CTAN sync 202003050300

45 files changed, 0 insertions, 9847 deletions

diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/Arara.java b/support/arara/source/src/main/java/com/github/cereda/arara/Arara.java
deleted file mode 100644
index 36405b1b47..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/Arara.java
+++ /dev/null
@@ -1,205 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara;
-
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.controller.LoggingController;
-import com.github.cereda.arara.model.AraraException;
-import com.github.cereda.arara.model.Configuration;
-import com.github.cereda.arara.model.Directive;
-import com.github.cereda.arara.model.Extractor;
-import com.github.cereda.arara.model.Interpreter;
-import com.github.cereda.arara.model.Parser;
-import com.github.cereda.arara.model.StopWatch;
-import com.github.cereda.arara.utils.CommonUtils;
-import com.github.cereda.arara.utils.DirectiveUtils;
-import com.github.cereda.arara.utils.DisplayUtils;
-import java.util.List;
-
-/**
- * Main class. This class wraps all classes from the application model as well
- * as utilitary classes in order to provide modularity.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Arara {
-
-    /**
-     * Main method. This is the application entry point.
-     * @param args A string array containing all command line arguments.
-     */
-    public static void main(String[] args) {
-
-        // the first component to be initialized is the
-        // language controller; note that init() actually
-        // has no body at all, but it's a dirty maneuver to
-        // trigger the static class startup
-        LanguageController.init();
-
-        // the second component to be initalized is the
-        // logging controller; note init() actually disables
-        // the logging, so early exceptions won't generate
-        // a lot of noise in the terminal
-        LoggingController.init();
-
-        // print the arara logo in the terminal; I just
-        // hope people use this tool in a good terminal with
-        // fixed-width fonts, otherwise the logo will be messed
-        DisplayUtils.printLogo();
-
-        try {
-
-            // first of all, let's try to load a potential
-            // configuration file located at the current
-            // user's home directory; if there's a bad
-            // configuration file, arara will panic and
-            // end the execution
-            Configuration.load();
-
-            // if we are here, either there was no configuration
-            // file at all or we managed to load the settings; now,
-            // it's time to properly parse the command line arguments;
-            // this is done by creating a brand new instance of arara's
-            // command line parser and providing the string array to it
-            Parser parser = new Parser(args);
-
-            // now let's see if we are good to go; parse() will return
-            // a boolean value indicating if the provided arguments
-            // allow the tool to continue (we might reach some special
-            // flags as well, like --help or --version, which simply
-            // do their jobs and return false, since there's no point
-            // of continuing processing with such flags)
-            if (parser.parse()) {
-
-                // let's print the current file information; it is a
-                // basic display, just the file name, the size properly
-                // formatted as a human readable format, and the last
-                // modification date; also, in this point, the logging
-                // feature starts to collect data (of course, if enabled
-                // either through the configuration file or manually
-                // in the command line)
-                DisplayUtils.printFileInformation();
-
-                // time to read the file and try to extract the directives;
-                // this class does a pretty good job on finding directives,
-                // including the multiline ones; it was a long awaited
-                // feature people were asking me to implement, so here
-                // it is!
-                Extractor extractor = new Extractor();
-
-                // extract() brings us a list of directives properly parsed
-                // and almost ready to be handled; note that no directives
-                // in the provided file will raise an exception; this is
-                // by design and I opted to not include a default fallback
-                // (although it wouldn't be so difficult to write one,
-                // I decided not to take the risk)
-                List<Directive> directives = extractor.extract();
-
-                // once we have our nice list of directives, it is time to
-                // actually validate them (for example, we have a couple of
-                // keywords that cannot be used as directive parameters);
-                // another interesting feature of the validate() method is
-                // to replicate a directive that has the 'files' keyword on
-                // it, since it's the whole point of having 'files' in the
-                // first place; if you check the log file, you will see
-                // that the list of extracted directives might differ from
-                // the final list of directives to be effectively processed
-                // by arara
-                directives = DirectiveUtils.validate(directives);
-
-                // arara features now a cool stopwatch, so we can see how
-                // much time has passed since everything started; start(),
-                // for obvious reasons, starts the stopwatch and keeps track
-                // of time for us; internally, this class makes use of
-                // nano time, so we might get an interesting precision here
-                // (although timing is not a serious business in here, it's
-                // just a cool addition)
-                StopWatch.start();
-
-                // this is surely the golden heart of arara; this class
-                // implements a powerful interpreter that will handle all
-                // rules and their corresponding tasks
-                Interpreter interpreter = new Interpreter();
-
-                // once we have this bad boy ready, let's provide the list
-                // of directives previously extracted and validated; it is
-                // like loading a cannon, I guess
-                interpreter.setDirectives(directives);
-
-                // time to shine, now the interpreter class will interpret
-                // one directive at a time, get the corresponding rule,
-                // set the parameters, evaluate it, get the tasks, run them,
-                // evaluate the result and print the status; note that
-                // arara, from this version on, will try to evaluate things
-                // progressively, so in case of an error, the previous tasks
-                // were already processed and potentially executed
-                interpreter.execute();
-            }
-
-        } catch (AraraException exception) {
-
-            // something bad just happened, so arara will print the proper
-            // exception and provide details on it, if available; the idea
-            // here is to propagate an exception throughout the whole
-            // application and catch it here instead of a local treatment
-            DisplayUtils.printException(exception);
-        }
-
-        // we are done here (with or without errors, that makes no difference
-        // at this point), so let's stop our stopwatch; now it's just an easy
-        // subtraction to be made (note that the values are internally
-        // represented as nanoseconds, but the result is printed as seconds)
-        StopWatch.stop();
-
-        // this is the last command from arara; once the execution time is
-        // available, print it; note that this notification is suppressed
-        // when the command line parsing returns false as result (it makes
-        // no sense to print the execution time for a help message, I guess)
-        DisplayUtils.printTime();
-
-        // gets the application exit status; the rule here is:
-        // 0 : everything went just fine (note that the dry-run mode always
-        //     makes arara exit with 0, unless it is an error in the directive
-        //     builder itself).
-        // 1 : one of the tasks failed, so the execution ended abruptly. This
-        //     means the error relies on the command line call, not with arara.
-        // 2 : arara just handled an exception, meaning that something bad
-        //     just happened and might require user intervention.
-        System.exit(CommonUtils.getExitStatus());
-
-        // I owe David Carlisle $100
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/controller/ConfigurationController.java b/support/arara/source/src/main/java/com/github/cereda/arara/controller/ConfigurationController.java
deleted file mode 100644
index 2dbc3a2bff..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/controller/ConfigurationController.java
+++ /dev/null
@@ -1,106 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.controller;
-
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * Implements the configuration controller. The idea here is to provide a map
- * that holds all configuration settings used by model and utilitary classes
- * throughout the execution. This controller is implemented as a singleton.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class ConfigurationController {
-
-    // the controller itself, since we have a singleton;
-    // this is the reference instance, instantiated once
-    private static final ConfigurationController instance =
-            new ConfigurationController();
-    
-    // the configuration settings are stored in a map;
-    // pretty much everything can be stored in this map,
-    // as long as you know what to retrieve later on
-    private final Map<String, Object> map;
-
-    /**
-     * Private constructor. Called once for creating the proper singleton.
-     */
-    private ConfigurationController() {
-        map = new HashMap<String, Object>();
-    }
-
-    /**
-     * Gets the current configuration controller. Since this class is
-     * implemented as a singleton, you will get the same controller every
-     * single time, and that's good.
-     * @return The configuration controller, which hold the settings map.
-     */
-    public static ConfigurationController getInstance() {
-        return instance;
-    }
-
-    /**
-     * Returns the object indexed by the provided key. This method provides an
-     * easy access to the underlying map.
-     * @param key A string representing the key.
-     * @return An object indexed by the provided key.
-     */
-    public Object get(String key) {
-        return map.get(key);
-    }
-
-    /**
-     * Puts the object in the map and indexes it in the provided key. This
-     * method provides an easy access to the underlying map.
-     * @param key A string representing the key.
-     * @param value The object to be indexed by the provided key.
-     */
-    public void put(String key, Object value) {
-        map.put(key, value);
-    }
-
-    /**
-     * Checks if the map contains the provided key. This is actually a wrapper
-     * to the private map's method of the same name.
-     * @param key The key to be checked.
-     * @return A boolean value indicating if the map contains the provided key.
-     */
-    public boolean contains(String key) {
-        return map.containsKey(key);
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/controller/LanguageController.java b/support/arara/source/src/main/java/com/github/cereda/arara/controller/LanguageController.java
deleted file mode 100644
index 85bfc3a43d..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/controller/LanguageController.java
+++ /dev/null
@@ -1,120 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.controller;
-
-import ch.qos.cal10n.IMessageConveyor;
-import ch.qos.cal10n.MessageConveyor;
-import java.util.Locale;
-
-/**
- * Implements the language controller. This controller provides a singleton
- * object that holds the application messages, easily available to all model
- * and utilitary classes.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class LanguageController {
-
-    // the controller itself, since we have a singleton;
-    // this is the reference instance, instantiated once
-    private static final LanguageController instance =
-            new LanguageController();
-    
-    // the message conveyor helps us to get localized messages
-    // according to the provided locale
-    private IMessageConveyor conveyor;
-
-    /**
-     * Private constructor. The fallback language is set to English for all
-     * messages in arara.
-     */
-    private LanguageController() {
-        conveyor = new MessageConveyor(new Locale("en"));
-    }
-
-    /**
-     * Initializes the class. This method actually does nothing, it just
-     * triggers the static attributions. Dirty, isn't it?
-     */
-    public static void init() {
-        // quack, quack, quack!
-    }
-
-    /**
-     * Gets the singleton reference. Since this class is implemented as a
-     * singleton, you will get the same controller every single time.
-     * @return The language controller which holds the conveyor.
-     */
-    public static LanguageController getInstance() {
-        return instance;
-    }
-
-    /**
-     * Sets the current locale. This method actually resets the language
-     * conveyor in order to use the new locale. It's quite simple.
-     * @param locale The new locale for localized messages through the language
-     * conveyor.
-     */
-    public void setLocale(Locale locale) {
-        conveyor = new MessageConveyor(locale);
-    }
-
-    /**
-     * Gets the localized message indexed by the provided enumeration key,
-     * applying an array of objects as parameters. This method is a wrapper to
-     * the conveyor's method of the same name.
-     * @param <E> Enumeration type that represents the conveyor messages.
-     * @param key Key set in the provided enumeration type.
-     * @param parameters Array of objects to be used as parameters.
-     * @return A string containing a localized message indexed by the provided
-     * enumeration key and applied the array of objects as parameters.
-     */
-    public <E extends Enum<?>> String getMessage(E key, Object... parameters) {
-        return conveyor.getMessage(key, parameters);
-    }
-
-    /**
-     * Gets the localized message indexed by the provided enumeration key. This
-     * method is a wrapper to the conveyor's method of the same name.
-     * @param <E> Enumeration type that represents the conveyor messages.
-     * @param key Key set in the provided enumeration type.
-     * @return A string containing a localized message indexed by the provided
-     * enumeration key.
-     */
-    public <E extends Enum<?>> String getMessage(E key) {
-        return conveyor.getMessage(key);
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/controller/LoggingController.java b/support/arara/source/src/main/java/com/github/cereda/arara/controller/LoggingController.java
deleted file mode 100644
index 958beec291..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/controller/LoggingController.java
+++ /dev/null
@@ -1,109 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.controller;
-
-import ch.qos.logback.classic.LoggerContext;
-import ch.qos.logback.classic.joran.JoranConfigurator;
-import ch.qos.logback.core.joran.spi.JoranException;
-import java.io.InputStream;
-import org.slf4j.LoggerFactory;
-
-/**
- * Implements the logging controller. This class actually sets the logging
- * configuration in order to allow appending results to a file.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class LoggingController {
-
-    /**
-     * Sets the logging configuration according to the provided boolean value.
-     * If the value is set to true, the log entries will be appended to a file,
-     * otherwise the logging feature will keep silent.
-     * @param enable A boolean value that indicates the logging behaviour
-     * throughout the application.
-     */
-    public static void enableLogging(boolean enable) {
-
-        // get the logger context from a factory, set a
-        // new context and reset it
-        LoggerContext loggerContext =
-                (LoggerContext) LoggerFactory.getILoggerFactory();
-
-        try {
-            
-            // get a new configuration and set
-            // the context
-            JoranConfigurator configurator = new JoranConfigurator();
-            configurator.setContext(loggerContext);
-            loggerContext.reset();
-            
-            // if enabled, the log entries will be
-            // appended to a file, otherwise it will
-            // remain silent
-            if (enable) {
-                
-                // set the file name and configure
-                // the logging controller to append
-                // entries to the file
-                String name = (String) ConfigurationController.
-                        getInstance().get("execution.log.name");
-                loggerContext.putProperty("name", name);
-                configurator.doConfigure(getResource());
-            }
-        } catch (JoranException exception) {
-            // quack, quack, quack!
-        }
-    }
-
-    /**
-     * Get the configuration resource as an input stream. The configuration
-     * is actually a XML file.
-     * @return An input stream of the provided configuration XML resource.
-     */
-    private static InputStream getResource() {
-        String resource = "/com/github/cereda/arara/configuration/logback.xml";
-        return LoggingController.class.getResourceAsStream(resource);
-    }
-
-    /**
-     * Initializes the logging controller by disabling it. I don't want an odd
-     * behaviour out of the box.
-     */
-    public static void init() {
-        enableLogging(false);
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/controller/SessionController.java b/support/arara/source/src/main/java/com/github/cereda/arara/controller/SessionController.java
deleted file mode 100644
index 41c627dc98..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/controller/SessionController.java
+++ /dev/null
@@ -1,124 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.controller;
-
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * Implements a session controller. This class wraps a map that holds the
- * execution session, that is, a dirty maneuver to exchange pretty much any
- * data between commands and even rules.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class SessionController {
-
-    // the controller itself, since we have a singleton;
-    // this is the reference instance, instantiated once
-    private static final SessionController instance =
-            new SessionController();
-    
-    // the session map which holds the execution session;
-    // the idea here is to provide wrappers to the map
-    // methods, so it could be easily manipulated
-    private final Map<String, Object> map;
-
-    /**
-     * Private constructor. Called once when the singleton is created.
-     */
-    private SessionController() {
-        map = new HashMap<String, Object>();
-    }
-
-    /**
-     * Gets the singleton reference. Since this class is implemented as a
-     * singleton, you will get the same controller every single time.
-     * @return The session controller which holds the session map.
-     */
-    public static SessionController getInstance() {
-        return instance;
-    }
-
-    /**
-     * Gets the object indexed by the provided key. This method actually holds
-     * the map method of the very same name.
-     * @param key The provided map key.
-     * @return The object indexed by the provided map key.
-     */
-    public Object get(String key) {
-        return map.get(key);
-    }
-
-    /**
-     * Puts the object in the session map and indexes it under the provided
-     * key. This method actually holds the map method of the very same name.
-     * @param key The provided map key.
-     * @param value The object to be indexed under the provided key.
-     */
-    public void put(String key, Object value) {
-        map.put(key, value);
-    }
-
-    /**
-     * Checks if the session map contains the provided key. This method holds
-     * the map method of the very same name.
-     * @param key The key to be checked.
-     * @return A boolean value indicating if the session map contains the
-     * provided key.
-     */
-    public boolean contains(String key) {
-        return map.containsKey(key);
-    }
-
-    /**
-     * Remove an entry from the map according to the provided key. This method
-     * holds the map method of the same name.
-     * @param key The provided key to indicate which session map entry should
-     * be removed.
-     */
-    public void remove(String key) {
-        map.remove(key);
-    }
-
-    /**
-     * Clears the session map. This method, as usual, holds the map method of
-     * the same name.
-     */
-    public void clear() {
-        map.clear();
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/controller/SystemCallController.java b/support/arara/source/src/main/java/com/github/cereda/arara/controller/SystemCallController.java
deleted file mode 100644
index 4d87adc8a8..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/controller/SystemCallController.java
+++ /dev/null
@@ -1,153 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.controller;
-
-import java.util.HashMap;
-import java.util.Map;
-import org.zeroturnaround.exec.ProcessExecutor;
-
-/**
- * Implements a system call controller. This class wraps a map that holds the
- * result of system specific variables not directly available at runtime.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class SystemCallController {
-
-    /**
-     * Implements a private command interface.
-     */
-    private interface Command {
-        
-        /**
-         * Executes the command body.
-         * @return An object.
-         */
-        public Object execute();
-    }
-    
-    // the controller itself, since we have a singleton;
-    // this is the reference instance, instantiated once
-    private static final SystemCallController instance =
-            new SystemCallController();
-    
-    // the system call map which holds the result of
-    // system specific variables not directly available
-    // at runtime; the idea here is to provide wrappers
-    // to the map getter, so it could be easily manipulated
-    private final Map<String, Object> map;
-    
-    // the commands map will allow the system call map being
-    // populated only on demand, that is, if the key is not
-    // found, this map will provide the corresponding method
-    // and update the value
-    private final Map<String, Command> commands;
-    
-    /**
-     * Private constructor. Called once when the singleton is created.
-     */
-    private SystemCallController() {
-        
-        // create the new map instance to be
-        // populated on demand
-        map = new HashMap<String, Object>();
-        
-        // create the new map of commands and
-        // add the corresponding system calls
-        commands = new HashMap<String, Command>();
-        
-        // add the check for a Cygwin
-        // environment in here
-        commands.put("cygwin", new Command() {
-            
-            /**
-             * Implements the body of the command. In this particular
-             * instance, it checks if we are inside a Cygwin environment.
-             * @return A boolean value indicating if we are inside a Cygwin
-             * environment.
-             */
-            public Object execute() {
-                try {
-
-                    // execute a new system call to 'uname -s', read the output
-                    // as an UTF-8 string, lowercase it and check if it starts
-                    // with the 'cygwin' string; if so, we are inside Cygwin
-                    return (
-                            new ProcessExecutor().command("uname", "-s").
-                                    readOutput(true).execute().outputUTF8()
-                            ).toLowerCase().startsWith("cygwin");
-
-                } catch (Exception exception) {
-
-                    // gracefully fallback in case of any nasty and evil
-                    // exception, e.g, if the command is unavailable
-                    return false;
-                }
-            }
-        });
-    }
-    
-    /**
-     * Gets the singleton reference. Since this class is implemented as a
-     * singleton, you will get the same controller every single time.
-     * @return The system call controller which holds the system call map.
-     */
-    public static SystemCallController getInstance() {
-        return instance;
-    }
-     
-    /**
-     * Gets the object indexed by the provided key. This method actually holds
-     * the map method of the very same name.
-     * @param key The provided map key.
-     * @return The object indexed by the provided map key.
-     */
-    public Object get(String key) {
-        
-        // if key is not found, meaning that
-        // the value wasn't required before
-        if (!map.containsKey(key)) {
-            
-            // perform the system call and
-            // populate the corresponding value
-            map.put(key, commands.get(key).execute());
-        }
-        
-        // simply return the corresponding
-        // value based on the provided key
-        return map.get(key);
-    }
-    
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/AraraException.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/AraraException.java
deleted file mode 100644
index 5f5d788e0f..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/AraraException.java
+++ /dev/null
@@ -1,88 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-/**
- * Implements the specific exception model for arara.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class AraraException extends Exception {
-
-    // the underlying exception,
-    // used to hold more details
-    // on what really happened
-    private Exception exception;
-
-    /**
-     * Constructor. Takes the exception message.
-     * @param message The exception message.
-     */
-    public AraraException(String message) {
-        super(message);
-    }
-
-    /**
-     * Constructor. Takes the exception message and the underlying exception.
-     * @param message The exception message.
-     * @param exception The underlying exception object.
-     */
-    public AraraException(String message, Exception exception) {
-        super(message);
-        this.exception = exception;
-    }
-
-    /**
-     * Gets the underlying exception.
-     * @return The underlying message.
-     */
-    public Exception getException() {
-        return exception;
-    }
-
-    /**
-     * Checks if there is an underlying exception defined in the current object.
-     * @return A boolean value indicating if the current object has an
-     * underlying exception.
-     */
-    public boolean hasException() {
-        if (exception != null) {
-            return (exception.getMessage() != null);
-        } else {
-            return false;
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Argument.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Argument.java
deleted file mode 100644
index b0e7d2bca6..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Argument.java
+++ /dev/null
@@ -1,125 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.utils.CommonUtils;
-
-/**
- * The rule argument model.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Argument {
-
-    // the argument identifier
-    private String identifier;
-    
-    // a boolean indicating if the
-    // current argument is required
-    private boolean required;
-    
-    // the flag to hold the argument
-    // value manipulation
-    private String flag;
-    
-    // the argument fallback if it is
-    // not defined in the directive
-    private String fallback;
-
-    /**
-     * Gets the identifier.
-     * @return The identifier.
-     */
-    public String getIdentifier() {
-        return CommonUtils.removeKeyword(identifier);
-    }
-
-    /**
-     * Sets the identifier.
-     * @param identifier The identifier.
-     */
-    public void setIdentifier(String identifier) {
-        this.identifier = identifier;
-    }
-
-    /**
-     * Checks if the argument is required.
-     * @return A boolean value indicating if the argument is required.
-     */
-    public boolean isRequired() {
-        return required;
-    }
-
-    /**
-     * Sets the argument requirement.
-     * @param required A boolean value.
-     */
-    public void setRequired(boolean required) {
-        this.required = required;
-    }
-
-    /**
-     * Gets the argument flag.
-     * @return The flag.
-     */
-    public String getFlag() {
-        return CommonUtils.removeKeyword(flag);
-    }
-
-    /**
-     * Sets the argument flag.
-     * @param flag The argument flag.
-     */
-    public void setFlag(String flag) {
-        this.flag = flag;
-    }
-
-    /**
-     * Gets the argument fallback.
-     * @return The argument fallback.
-     */
-    public String getDefault() {
-        return CommonUtils.removeKeyword(fallback);
-    }
-
-    /**
-     * Sets the argument fallback.
-     * @param fallback The argument fallback.
-     */
-    public void setDefault(String fallback) {
-        this.fallback = fallback;
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Command.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Command.java
deleted file mode 100644
index 848f3f3010..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Command.java
+++ /dev/null
@@ -1,127 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.utils.CommonUtils;
-import java.io.File;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-/**
- * Implements a command model, containing a list of strings.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Command {
-
-    // a list of elements which are components
-    // of a command and represented as strings
-    private final List<String> elements;
-    
-    // an optional file acting as a reference
-    // for the default working directory
-    private File workingDirectory;
-
-    /**
-     * Constructor.
-     * @param values An array of objects.
-     */
-    public Command(Object... values) {
-        elements = new ArrayList<String>();
-        List result = CommonUtils.flatten(Arrays.asList(values));
-        for (Object value : result) {
-            String element = String.valueOf(value);
-            if (!CommonUtils.checkEmptyString(element)) {
-                elements.add(element);
-            }
-        }
-    }
-
-    /**
-     * Constructor.
-     * @param elements A list of strings.
-     */
-    public Command(List<String> elements) {
-        this.elements = elements;
-    }
-
-    /**
-     * Gets the list of strings representing each element of a command.
-     * @return A list of strings.
-     */
-    public List<String> getElements() {
-        return elements;
-    }
-
-    /**
-     * Sets the working directory.
-     * @param workingDirectory A file representing the working directory.
-     */
-    public void setWorkingDirectory(File workingDirectory) {
-        this.workingDirectory = workingDirectory;
-    }
-
-    /**
-     * Gets the working directory, if any.
-     * @return A file representing the working directory.
-     */
-    public File getWorkingDirectory() {
-        return workingDirectory;
-    }
-    
-    /**
-     * Checks if a working directory was defined.
-     * @return A logic value indicating if a working directory was defined.
-     */
-    public boolean hasWorkingDirectory() {
-        return workingDirectory != null;
-    }
-
-    /**
-     * Provides a textual representation of the current command.
-     * @return A string representing the current command.
-     */
-    @Override
-    public String toString() {
-        return CommonUtils.getCollectionElements(elements, "[ ", " ]", ", ").
-                concat(
-                        hasWorkingDirectory()
-                        ? " @ " + workingDirectory.toString()
-                        : ""
-                );
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Conditional.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Conditional.java
deleted file mode 100644
index d8f0543709..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Conditional.java
+++ /dev/null
@@ -1,139 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-/**
- * The conditional class, it represents the type of conditional available
- * for a directive and its corresponding expression to be evaluated.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Conditional {
-
-    // these are all types of conditionals arara
-    // is able to recognize; personally, I believe
-    // they are more than sufficient to cover the
-    // majority of test cases
-    public enum ConditionalType {
-
-        // evaluated beforehand, directive is interpreted
-        // if and only if the result is true
-        IF,
-        
-        // there is no evaluation, directive is interpreted,
-        // no extra effort is needed
-        NONE,
-        
-        // evaluated beforehand, directive is interpreted
-        // if and only if the result is false
-        UNLESS,
-        
-        // directive is interpreted the first time, then the
-        // evaluation is done; while the result is false,
-        // the directive is interpreted again and again
-        UNTIL,
-        
-        // evaluated beforehand, directive is interpreted if
-        // and oly if the result is true, and the process is
-        // repeated while the result still holds true
-        WHILE
-    }
-
-    // the conditional type, specified above; the
-    // default fallback, as seen in the constructor,
-    // is set to NONE, that is, no conditional at all
-    private ConditionalType type;
-    
-    // the expression to be evaluated according to its
-    // type; the default fallback, as seen in the
-    // constructor, is set to an empty string
-    private String condition;
-
-    /**
-     * Constructor.
-     */
-    public Conditional() {
-        type = ConditionalType.NONE;
-        condition = "";
-    }
-
-    /**
-     * Gets the conditional type.
-     * @return The conditional type.
-     */
-    public ConditionalType getType() {
-        return type;
-    }
-
-    /**
-     * Sets the conditional type.
-     * @param type The conditional type.
-     */
-    public void setType(ConditionalType type) {
-        this.type = type;
-    }
-    
-    /**
-     * Gets the condition, that is, the expression to be evaluated.
-     * @return A string representing the condition.
-     */
-    public String getCondition() {
-        return condition;
-    }
-
-    /**
-     * Sets the condition, that is, the expression to be evaluated.
-     * @param condition A string representing the condition.
-     */
-    public void setCondition(String condition) {
-        this.condition = condition;
-    }
-
-    /**
-     * Provides a textual representation of the conditional object.
-     * @return A string representation of this object.
-     */
-    @Override
-    public String toString() {
-        StringBuilder builder = new StringBuilder();
-        builder.append("{ ").append(type);
-        if (type != ConditionalType.NONE) {
-            builder.append(", expression: ").append(condition.trim());
-        }
-        builder.append(" }");
-        return builder.toString();
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Configuration.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Configuration.java
deleted file mode 100644
index 70f6382364..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Configuration.java
+++ /dev/null
@@ -1,246 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.utils.CommonUtils;
-import com.github.cereda.arara.utils.ConfigurationUtils;
-import java.io.File;
-import java.nio.charset.Charset;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.concurrent.TimeUnit;
-
-/**
- * Implements the configuration model, which holds the default settings and can
- * load the configuration file.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Configuration {
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Loads the application configuration.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static void load() throws AraraException {
-
-        // initialize both file type and language models,
-        // since we can track errors from there instead
-        // of relying on a check on this level
-        FileType.init();
-        Language.init();
-
-        // reset everything
-        reset();
-
-        // get the configuration file, if any
-        File file = ConfigurationUtils.getConfigFile();
-        if (file != null) {
-            
-            // set the configuration file name for
-            // logging purposes
-            ConfigurationController.getInstance().
-                    put("execution.configuration.name",
-                            CommonUtils.getCanonicalPath(file)
-                    );
-            
-            // then validate it and update the
-            // configuration accordingly
-            Resource resource = ConfigurationUtils.validateConfiguration(file);
-            update(resource);
-        }
-
-        // just to be sure, update the
-        // current locale in order to
-        // display localized messages
-        Locale locale = ((Language) ConfigurationController.
-                getInstance().get("execution.language")).getLocale();
-        LanguageController.getInstance().setLocale(locale);
-    }
-
-    /**
-     * Resets the configuration to initial settings.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private static void reset() throws AraraException {
-
-        // put everything in a map to be
-        // later assigned to the configuration
-        // controller, which holds the settings
-        Map<String, Object> mapping = new HashMap<String, Object>();
-
-        mapping.put("execution.loops", 10L);
-        mapping.put("directives.charset", Charset.forName("UTF-8"));
-        mapping.put("execution.errors.halt", true);
-        mapping.put("execution.timeout", false);
-        mapping.put("execution.timeout.value", 0L);
-        mapping.put("execution.timeout.unit", TimeUnit.MILLISECONDS);
-        mapping.put("application.version", "4.0");
-        mapping.put("application.revision", "2");
-        mapping.put("directives.linebreak.pattern", "^\\s*-->\\s(.*)$");
-
-        String directive = "^\\s*(\\w+)\\s*(:\\s*(\\{.*\\})\\s*)?";
-        String pattern = "(\\s+(if|while|until|unless)\\s+(\\S.*))?$";
-
-        mapping.put("directives.pattern", directive.concat(pattern));
-        mapping.put("application.pattern", "arara:\\s");
-        mapping.put("application.width", 65);
-        mapping.put("execution.database.name", "arara");
-        mapping.put("execution.log.name", "arara");
-        mapping.put("execution.verbose", false);
-
-        mapping.put("trigger.halt", false);
-        mapping.put("execution.language", new Language("en"));
-        mapping.put("execution.logging", false);
-        mapping.put("execution.dryrun", false);
-        mapping.put("execution.status", 0);
-        mapping.put("application.copyright.year", "2012-2019");
-        mapping.put("execution.filetypes", ConfigurationUtils.
-                getDefaultFileTypes());
-        mapping.put("execution.rule.paths",
-                Arrays.asList(
-                        CommonUtils.buildPath(
-                                ConfigurationUtils.getApplicationPath(),
-                                "rules"
-                        )
-                )
-        );
-        
-        mapping.put("execution.preambles", new HashMap<String, String>());
-        mapping.put("execution.preamble.active", false);
-        mapping.put("execution.configuration.name", "[none]");
-        mapping.put("execution.header", false);
-        mapping.put("ui.lookandfeel", "none");
-
-        // get the configuration controller and
-        // set every map key to it
-        ConfigurationController controller =
-                ConfigurationController.getInstance();
-        for (String key : mapping.keySet()) {
-            controller.put(key, mapping.get(key));
-        }
-    }
-
-    /**
-     * Update the configuration based on the provided map.
-     * @param data Map containing the new configuration settings.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private static void update(Resource resource) throws AraraException {
-
-        ConfigurationController controller =
-                ConfigurationController.getInstance();
-
-        if (resource.getPaths() != null) {
-            List<String> paths = resource.getPaths();
-            paths = ConfigurationUtils.normalizePaths(paths);
-            controller.put("execution.rule.paths", paths);
-        }
-
-        if (resource.getFiletypes() != null) {
-            List<FileTypeResource> resources = resource.getFiletypes();
-            List<FileType> filetypes = new ArrayList<FileType>();
-            for (FileTypeResource type : resources) {
-                if (type.getPattern() != null) {
-                    filetypes.add(
-                            new FileType(type.getExtension(), type.getPattern())
-                    );
-                } else {
-                    filetypes.add(new FileType(type.getExtension()));
-                }
-            }
-            filetypes = ConfigurationUtils.normalizeFileTypes(filetypes);
-            controller.put("execution.filetypes", filetypes);
-        }
-
-        controller.put("execution.verbose", resource.isVerbose());
-        controller.put("execution.logging", resource.isLogging());
-        controller.put("execution.header", resource.isHeader());
-
-        if (resource.getDbname() != null) {
-            controller.put("execution.database.name",
-                    ConfigurationUtils.cleanFileName(resource.getDbname()));
-        }
-
-        if (resource.getLogname() != null) {
-            controller.put("execution.log.name",
-                    ConfigurationUtils.cleanFileName(resource.getLogname()));
-        }
-
-        if (resource.getLanguage() != null) {
-            controller.put("execution.language",
-                    new Language(resource.getLanguage()));
-        }
-
-        long loops = resource.getLoops();
-        if (loops > 0) {
-            controller.put("execution.loops", loops);
-        } else {
-            if (loops < 0) {
-                throw new AraraException(
-                        messages.getMessage(
-                                Messages.ERROR_CONFIGURATION_LOOPS_INVALID_RANGE
-                        )
-                );
-            }
-        }
-        
-        if (resource.getPreambles() != null) {
-            controller.put("execution.preambles",
-                    resource.getPreambles());
-        }
-        
-        if (resource.getLaf() != null) {
-            controller.put("ui.lookandfeel",
-                    resource.getLaf());
-        }
-        
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Database.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Database.java
deleted file mode 100644
index 474209e405..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Database.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import java.util.HashMap;
-import org.simpleframework.xml.ElementMap;
-import org.simpleframework.xml.Root;
-
-/**
- * The XML database model, which keeps track on file changes. I am using the
- * Simple framework to marshall and unmarshall objects and XML files.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-@Root(name = "status")
-public class Database {
-
-    // the whole database is implemented as a map, where
-    // the key is the absolute canonical file and the value
-    // is its corresponding CRC32 hash; the XML map is done
-    // inline, so it does not clutter the output a lot
-    @ElementMap(entry = "hash", key = "file", attribute = true, inline = true)
-    private HashMap<String, String> map;
-
-    /**
-     * Constructor. It creates a new map.
-     */
-    public Database() {
-        map = new HashMap<String, String>();
-    }
-
-    /**
-     * Gets the map.
-     * @return The map.
-     */
-    public HashMap<String, String> getMap() {
-        return map;
-    }
-
-    /**
-     * Sets the map.
-     * @param map The map.
-     */
-    public void setMap(HashMap<String, String> map) {
-        this.map = map;
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Directive.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Directive.java
deleted file mode 100644
index a3831db8b2..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Directive.java
+++ /dev/null
@@ -1,146 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import java.util.List;
-import java.util.Map;
-
-/**
- * Implements the directive model.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Directive {
-
-    // the directive identifier, it is resolved
-    // to the rule identifier later on
-    private String identifier;
-    
-    // a map containing the parameters; they
-    // are validated later on in order to
-    // ensure they are valid
-    private Map<String, Object> parameters;
-    
-    // a conditional containing the type and
-    // the expression to be evaluated later on
-    private Conditional conditional;
-    
-    // a list contained all line numbers from
-    // the main file which built the current
-    // directive
-    private List<Integer> lineNumbers;
-
-    /**
-     * Gets the directive identifier.
-     * @return A string representing the directive identifier.
-     */
-    public String getIdentifier() {
-        return identifier;
-    }
-
-    /**
-     * Sets the directive identifier.
-     * @param identifier A string representing the directive identifier.
-     */
-    public void setIdentifier(String identifier) {
-        this.identifier = identifier;
-    }
-
-    /**
-     * Gets the directive parameters.
-     * @return A map containing the directive parameters.
-     */
-    public Map<String, Object> getParameters() {
-        return parameters;
-    }
-
-    /**
-     * Sets the directive parameters.
-     * @param parameters A map containing the directive parameters.
-     */
-    public void setParameters(Map<String, Object> parameters) {
-        this.parameters = parameters;
-    }
-
-    /**
-     * Gets the conditional object from the current directive.
-     * @return The conditional object from the current directive.
-     */
-    public Conditional getConditional() {
-        return conditional;
-    }
-
-    /**
-     * Sets the conditional object from the current directive.
-     * @param conditional The conditional object from the current directive.
-     */
-    public void setConditional(Conditional conditional) {
-        this.conditional = conditional;
-    }
-
-    /**
-     * Gets the list containing all line numbers from the current directive.
-     * @return A list containing all line numbers from the current directive.
-     */
-    public List<Integer> getLineNumbers() {
-        return lineNumbers;
-    }
-
-    /**
-     * Sets the list containing all line numbers from the current directive.
-     * @param lineNumbers A list containing all line numbers from the current
-     * directive.
-     */
-    public void setLineNumbers(List<Integer> lineNumbers) {
-        this.lineNumbers = lineNumbers;
-    }
-
-    /**
-     * Provides a textual representation of the current directive.
-     * @return A string containing a textual representation of the current
-     * directive.
-     */
-    @Override
-    public String toString() {
-        StringBuilder builder = new StringBuilder();
-        builder.append("Directive: { ");
-        builder.append("identifier: ").append(identifier).append(", ");
-        builder.append("parameters: ").append(parameters).append(", ");
-        builder.append("conditional: ").append(conditional).append(", ");
-        builder.append("lines: ").append(lineNumbers).append(" }");
-        return builder.toString();
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Evaluator.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Evaluator.java
deleted file mode 100644
index 30995ecaf9..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Evaluator.java
+++ /dev/null
@@ -1,158 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.utils.CommonUtils;
-import com.github.cereda.arara.utils.Methods;
-import java.util.HashMap;
-import java.util.Map;
-import org.mvel2.templates.TemplateRuntime;
-
-/**
- * Implements the evaluator model, on which a conditional can be analyzed and
- * processed.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Evaluator {
-
-    // this attribute holds the maximum number of
-    // loops arara will accept; it's like
-    // reaching infinity
-    private final long loops;
-    
-    // the counter for the current execution, it
-    // helps us keep track of the number of times
-    // this evaluation has happened, and also to
-    // prevent potential infinite loops
-    private long counter;
-    
-    // a flag that indicates the
-    // evaluation to halt regardless
-    // of the the result
-    private boolean halt;
-    
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Constructor. It gets the application maximum number of loops and reset
-     * all counters.
-     */
-    public Evaluator() {
-        loops = (Long) ConfigurationController.getInstance().
-                get("execution.loops");
-        counter = 0;
-        halt = false;
-    }
-
-    /**
-     * Evaluate the provided conditional.
-     * @param conditional The conditional object.
-     * @return A boolean value indicating if the conditional holds.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public boolean evaluate(Conditional conditional) throws AraraException {
-        
-        // when in dry-run mode, arara
-        // always ignore conditional evaluations
-        if (((Boolean) ConfigurationController.
-                getInstance().get("execution.dryrun")) == true) {
-            return false;
-        }
-
-        switch (conditional.getType()) {
-            case NONE:
-                return false;
-            case IF:
-            case UNLESS:
-                if (!halt) {
-                    halt = true;
-                } else {
-                    return false;
-                }
-                break;
-        }
-
-        // check counters and see if the execution
-        // has reached our concept of infinity,
-        // thus breaking the cycles
-        counter++;
-        if (((conditional.getType() == Conditional.ConditionalType.WHILE) &&
-                (counter > loops)) ||
-                ((conditional.getType() == Conditional.ConditionalType.UNTIL) &&
-                (counter >= loops))) {
-            return false;
-        } else {
-
-            Map<String, Object> context = new HashMap<String, Object>();
-            Methods.addConditionalMethods(context);
-
-            try {
-                Object result = TemplateRuntime.eval("@{ ".concat(
-                        conditional.getCondition()).concat(" }"), context);
-                if (!CommonUtils.checkClass(Boolean.class, result)) {
-                    throw new AraraException(
-                            messages.getMessage(
-                                    Messages.ERROR_EVALUATE_NOT_BOOLEAN_VALUE
-                            )
-                    );
-                } else {
-                    boolean value = (Boolean) result;
-                    switch (conditional.getType()) {
-                        case UNLESS:
-                        case UNTIL:
-                            value = !value;
-                            break;
-                    }
-                    return value;
-                }
-            } catch (RuntimeException exception) {
-                throw new AraraException(
-                        messages.getMessage(
-                                Messages.ERROR_EVALUATE_COMPILATION_FAILED
-                        ),
-                        exception
-                );
-            }
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Extractor.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Extractor.java
deleted file mode 100644
index b4a248688a..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Extractor.java
+++ /dev/null
@@ -1,88 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.utils.CommonUtils;
-import com.github.cereda.arara.utils.DirectiveUtils;
-import java.io.File;
-import java.io.IOException;
-import java.nio.charset.Charset;
-import java.util.List;
-import org.apache.commons.io.FileUtils;
-
-/**
- * It extracts directives from the provided main file.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Extractor {
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Extracts a list of directives from the provided main file, obtained from
-     * the configuration controller.
-     * @return A list of directives.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public List<Directive> extract() throws AraraException {
-
-        File file = (File) ConfigurationController.
-                getInstance().get("execution.reference");
-        Charset charset = (Charset) ConfigurationController.
-                getInstance().get("directives.charset");
-
-        try {
-            List<String> content = CommonUtils.getPreambleContent();
-            List<String> lines = FileUtils.readLines(file, charset.name());
-            content.addAll(lines);
-            return DirectiveUtils.extractDirectives(content);
-        } catch (IOException ioexception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_EXTRACTOR_IO_ERROR
-                    ),
-                    ioexception
-            );
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/FileType.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/FileType.java
deleted file mode 100644
index e7403bee51..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/FileType.java
+++ /dev/null
@@ -1,170 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.utils.CommonUtils;
-import java.util.HashMap;
-import java.util.Map;
-import org.apache.commons.lang.builder.EqualsBuilder;
-import org.apache.commons.lang.builder.HashCodeBuilder;
-
-/**
- * Implements the file type model.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class FileType {
-
-    // string representing the
-    // file extension
-    private String extension;
-    
-    // string representing the
-    // file pattern to be used
-    // as directive lookup
-    private String pattern;
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    // a map containing all file
-    // types that arara accepts
-    private static final Map<String, String> types =
-            new HashMap<String, String>();
-
-    /**
-     * Initializes the file type class by setting the default file types and
-     * their corresponding patterns.
-     */
-    public static void init() {
-        types.put("tex", "^\\s*%\\s+");
-        types.put("dtx", "^\\s*%\\s+");
-        types.put("ltx", "^\\s*%\\s+");
-        types.put("drv", "^\\s*%\\s+");
-        types.put("ins", "^\\s*%\\s+");
-    }
-
-    /**
-     * Constructor. It takes both file extension and pattern lookup.
-     * @param extension The file extension.
-     * @param pattern The file pattern.
-     */
-    public FileType(String extension, String pattern) {
-        this.extension = extension;
-        this.pattern = pattern;
-    }
-
-    /**
-     * Constructor. It takes the extension, but it might raise an exception if
-     * the extension is unknown. This constructor is used when you just want
-     * to reorganize the file lookup priority without the need of changing the
-     * default extensions.
-     * @param extension The file extension.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public FileType(String extension) throws AraraException {
-        if (types.containsKey(extension)) {
-            this.extension = extension;
-            this.pattern = types.get(extension);
-        } else {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_FILETYPE_UNKNOWN_EXTENSION,
-                            extension,
-                            CommonUtils.getFileTypesList()
-                    )
-            );
-        }
-    }
-
-    /**
-     * Implements the file type hash code. Note that only the file extension is
-     * considered.
-     * @return An integer representing the file type hash code.
-     */
-    @Override
-    public int hashCode() {
-        return new HashCodeBuilder().append(extension).toHashCode();
-    }
-
-    /**
-     * Implements the file type equals method, checking if one file type is
-     * equal to another. Note that only the file extension is considered.
-     * @param object The object to be analyzed.
-     * @return A boolean value indicating if those two objects are equal.
-     */
-    @Override
-    public boolean equals(Object object) {
-        if (object == null) {
-            return false;
-        }
-        if (getClass() != object.getClass()) {
-            return false;
-        }
-        final FileType reference = (FileType) object;
-        return new EqualsBuilder().append(extension, reference.extension).isEquals();
-    }
-
-    /**
-     * Gets the file type extension.
-     * @return String representing the file type extension.
-     */
-    public String getExtension() {
-        return extension;
-    }
-
-    /**
-     * Gets the file type pattern.
-     * @return String representing the file type pattern.
-     */
-    public String getPattern() {
-        return pattern;
-    }
-    
-    /**
-     * Provides a textual representation of the current file type object.
-     * @return A string containing a textual representation of the current file
-     * type object.
-     */
-    @Override
-    public String toString() {
-        return ".".concat(extension);
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/FileTypeResource.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/FileTypeResource.java
deleted file mode 100644
index d23b10f9f5..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/FileTypeResource.java
+++ /dev/null
@@ -1,84 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.utils.CommonUtils;
-
-/**
- * Implements the file type resource model.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class FileTypeResource {
-
-    // the file extension
-    private String extension;
-    
-    // the file pattern
-    private String pattern;
-
-    /**
-     * Gets the extension.
-     * @return The extension.
-     */
-    public String getExtension() {
-        return CommonUtils.removeKeyword(extension);
-    }
-
-    /**
-     * Sets the extension.
-     * @param extension The extension.
-     */
-    public void setExtension(String extension) {
-        this.extension = extension;
-    }
-
-    /**
-     * Gets the pattern.
-     * @return The pattern.
-     */
-    public String getPattern() {
-        return CommonUtils.removeKeyword(pattern);
-    }
-
-    /**
-     * Sets the pattern.
-     * @param pattern The pattern.
-     */
-    public void setPattern(String pattern) {
-        this.pattern = pattern;
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Interpreter.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Interpreter.java
deleted file mode 100644
index 30c18a3074..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Interpreter.java
+++ /dev/null
@@ -1,486 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.utils.CommonUtils;
-import com.github.cereda.arara.utils.DisplayUtils;
-import com.github.cereda.arara.utils.InterpreterUtils;
-import com.github.cereda.arara.utils.Methods;
-import com.github.cereda.arara.utils.RuleUtils;
-import java.io.File;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import org.mvel2.templates.TemplateRuntime;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * Interprets the list of directives.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Interpreter {
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages
-            = LanguageController.getInstance();
-
-    // the class logger obtained from
-    // the logger factory
-    private static final Logger logger
-            = LoggerFactory.getLogger(Interpreter.class);
-
-    // list of directives to be
-    // interpreted in here
-    private List<Directive> directives;
-
-    /**
-     * Sets the list of directives.
-     * @param directives The list of directives.
-     */
-    public void setDirectives(List<Directive> directives) {
-        this.directives = directives;
-    }
-
-    /**
-     * Executes each directive, throwing an exception if something bad has
-     * happened.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public void execute() throws AraraException {
-
-        for (Directive directive : directives) {
-
-            logger.info(
-                    messages.getMessage(
-                            Messages.LOG_INFO_INTERPRET_RULE,
-                            directive.getIdentifier()
-                    )
-            );
-
-            ConfigurationController.getInstance().
-                    put("execution.file",
-                            directive.getParameters().get("reference")
-                    );
-            File file = getRule(directive);
-
-            logger.info(
-                    messages.getMessage(
-                            Messages.LOG_INFO_RULE_LOCATION,
-                            file.getParent()
-                    )
-            );
-
-            ConfigurationController.getInstance().
-                    put("execution.info.rule.id", directive.getIdentifier());
-            ConfigurationController.getInstance().
-                    put("execution.info.rule.path", file.getParent());
-            ConfigurationController.getInstance().
-                    put("execution.directive.lines",
-                            directive.getLineNumbers()
-                    );
-            ConfigurationController.getInstance().
-                    put("execution.directive.reference",
-                            directive.getParameters().get("reference")
-                    );
-
-            Rule rule = parseRule(file, directive);
-            Map<String, Object> parameters = parseArguments(rule, directive);
-            Methods.addRuleMethods(parameters);
-
-            String name = rule.getName();
-            List<String> authors = rule.getAuthors() == null
-                    ? new ArrayList<String>() : rule.getAuthors();
-            ConfigurationController.getInstance().
-                    put("execution.rule.arguments",
-                            InterpreterUtils.getRuleArguments(rule)
-                    );
-
-            Evaluator evaluator = new Evaluator();
-
-            boolean available = true;
-            if (InterpreterUtils.
-                    runPriorEvaluation(directive.getConditional())) {
-                available = evaluator.evaluate(directive.getConditional());
-            }
-
-            if (available) {
-
-                do {
-
-                    List<RuleCommand> commands = rule.getCommands();
-                    for (RuleCommand command : commands) {
-                        String closure = command.getCommand();
-                        Object result = null;
-                        try {
-                            result = TemplateRuntime.eval(closure, parameters);
-                        } catch (RuntimeException exception) {
-                            throw new AraraException(
-                                    CommonUtils.getRuleErrorHeader().concat(
-                                            messages.getMessage(
-                                                    Messages.ERROR_INTERPRETER_COMMAND_RUNTIME_ERROR
-                                            )
-                                    ),
-                                    exception
-                            );
-                        }
-
-                        List<Object> execution = new ArrayList<Object>();
-                        if (CommonUtils.checkClass(List.class, result)) {
-                            execution = CommonUtils.flatten((List<?>) result);
-                        } else {
-                            execution.add(result);
-                        }
-
-                        for (Object current : execution) {
-
-                            if (current == null) {
-                                throw new AraraException(
-                                        CommonUtils.getRuleErrorHeader().concat(
-                                                messages.getMessage(
-                                                        Messages.ERROR_INTERPRETER_NULL_COMMAND
-                                                )
-                                        )
-                                );
-                            } else {
-
-                                if (!CommonUtils.checkEmptyString(
-                                        String.valueOf(current))) {
-
-                                    DisplayUtils.printEntry(name,
-                                            command.getName() == null
-                                            ? messages.getMessage(
-                                                    Messages.INFO_LABEL_UNNAMED_TASK
-                                            )
-                                            : command.getName()
-                                    );
-                                    boolean success = true;
-
-                                    if (CommonUtils.checkClass(
-                                            Trigger.class, current)) {
-                                        if (((Boolean) ConfigurationController.
-                                                getInstance().
-                                                get("execution.dryrun")) == false) {
-                                            if (((Boolean) ConfigurationController.
-                                                    getInstance().
-                                                    get("execution.verbose")) == true) {
-                                                DisplayUtils.wrapText(
-                                                        messages.getMessage(
-                                                                Messages.INFO_INTERPRETER_VERBOSE_MODE_TRIGGER_MODE
-                                                        )
-                                                );
-                                            }
-                                        } else {
-                                            DisplayUtils.printAuthors(authors);
-                                            DisplayUtils.wrapText(
-                                                    messages.getMessage(
-                                                            Messages.INFO_INTERPRETER_DRYRUN_MODE_TRIGGER_MODE
-                                                    )
-                                            );
-                                            DisplayUtils.printConditional(
-                                                    directive.getConditional()
-                                            );
-                                        }
-                                        Trigger trigger = (Trigger) current;
-                                        trigger.process();
-                                    } else {
-                                        if (CommonUtils.checkClass(
-                                                Boolean.class, current)) {
-                                            success = (Boolean) current;
-                                            logger.info(
-                                                    messages.getMessage(
-                                                            Messages.LOG_INFO_BOOLEAN_MODE,
-                                                            String.valueOf(success)
-                                                    )
-                                            );
-
-                                            if (((Boolean) ConfigurationController.
-                                                    getInstance().
-                                                    get("execution.dryrun")) == true) {
-
-                                                DisplayUtils.printAuthors(authors);
-                                                DisplayUtils.wrapText(
-                                                        messages.getMessage(
-                                                                Messages.INFO_INTERPRETER_DRYRUN_MODE_BOOLEAN_MODE,
-                                                                success
-                                                        )
-                                                );
-                                                DisplayUtils.printConditional(
-                                                        directive.getConditional()
-                                                );
-                                            }
-                                        } else {
-
-                                            Object representation
-                                                    = CommonUtils.checkClass(
-                                                            Command.class,
-                                                            current
-                                                    )
-                                                    ? current
-                                                    : String.valueOf(current);
-                                            logger.info(
-                                                    messages.getMessage(
-                                                            Messages.LOG_INFO_SYSTEM_COMMAND,
-                                                            representation
-                                                    )
-                                            );
-
-                                            if (((Boolean) ConfigurationController.
-                                                    getInstance().
-                                                    get("execution.dryrun")) == false) {
-                                                int code = InterpreterUtils.
-                                                        run(representation);
-                                                Object check = null;
-                                                try {
-                                                    Map<String, Object> context
-                                                            = new HashMap<String, Object>();
-                                                    context.put("value", code);
-                                                    check = TemplateRuntime.eval(
-                                                            "@{ ".concat(
-                                                                    command.getExit() == null
-                                                                    ? "value == 0"
-                                                                    : command.getExit()).concat(" }"),
-                                                            context);
-                                                } catch (RuntimeException exception) {
-                                                    throw new AraraException(
-                                                            CommonUtils.getRuleErrorHeader().
-                                                                    concat(
-                                                                            messages.getMessage(
-                                                                                    Messages.ERROR_INTERPRETER_EXIT_RUNTIME_ERROR
-                                                                            )
-                                                                    ),
-                                                            exception
-                                                    );
-                                                }
-                                                if (CommonUtils.
-                                                        checkClass(
-                                                                Boolean.class,
-                                                                check)) {
-                                                    success = (Boolean) check;
-                                                } else {
-                                                    throw new AraraException(
-                                                            CommonUtils.getRuleErrorHeader().concat(
-                                                                    messages.getMessage(
-                                                                            Messages.ERROR_INTERPRETER_WRONG_EXIT_CLOSURE_RETURN
-                                                                    )
-                                                            )
-                                                    );
-                                                }
-                                            } else {
-                                                DisplayUtils.printAuthors(authors);
-                                                DisplayUtils.wrapText(
-                                                        messages.getMessage(
-                                                                Messages.INFO_INTERPRETER_DRYRUN_MODE_SYSTEM_COMMAND,
-                                                                representation
-                                                        )
-                                                );
-                                                DisplayUtils.printConditional(
-                                                        directive.getConditional()
-                                                );
-                                            }
-                                        }
-                                    }
-
-                                    DisplayUtils.printEntryResult(success);
-
-                                    if (((Boolean) ConfigurationController.
-                                            getInstance().get("trigger.halt"))
-                                            || (((Boolean) ConfigurationController.
-                                                    getInstance().
-                                                    get("execution.errors.halt")
-                                            && !success))) {
-                                        return;
-                                    }
-                                }
-                            }
-                        }
-                    }
-                } while (evaluator.evaluate(directive.getConditional()));
-            }
-        }
-    }
-
-    /**
-     * Gets the rule according to the provided directive.
-     * @param directive The provided directive.
-     * @return The absolute canonical path of the rule, given the provided
-     * directive.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private File getRule(Directive directive) throws AraraException {
-        File file = InterpreterUtils.buildRulePath(directive.getIdentifier());
-        if (file == null) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_INTERPRETER_RULE_NOT_FOUND,
-                            directive.getIdentifier(),
-                            CommonUtils.getCollectionElements(
-                                    CommonUtils.getAllRulePaths(),
-                                    "(",
-                                    ")",
-                                    "; "
-                            )
-                    )
-            );
-        } else {
-            return file;
-        }
-    }
-
-    /**
-     * Parses the rule against the provided directive.
-     * @param file The file representing the rule.
-     * @param directive The directive to be analyzed.
-     * @return A rule object.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private Rule parseRule(File file, Directive directive)
-            throws AraraException {
-        return RuleUtils.parseRule(file, directive.getIdentifier());
-    }
-
-    /**
-     * Parses the rule arguments against the provided directive.
-     * @param rule The rule object.
-     * @param directive The directive.
-     * @return A map containing all arguments resolved according to the
-     * directive parameters.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private Map<String, Object> parseArguments(Rule rule, Directive directive)
-            throws AraraException {
-
-        List<Argument> arguments = rule.getArguments();
-
-        Set<String> unknown = CommonUtils.
-                getUnknownKeys(directive.getParameters(), arguments);
-        unknown.remove("file");
-        unknown.remove("reference");
-        if (!unknown.isEmpty()) {
-            throw new AraraException(
-                    CommonUtils.getRuleErrorHeader().concat(
-                            messages.getMessage(
-                                    Messages.ERROR_INTERPRETER_UNKNOWN_KEYS,
-                                    CommonUtils.getCollectionElements(
-                                            unknown,
-                                            "(",
-                                            ")",
-                                            ", "
-                                    )
-                            )
-                    )
-            );
-        }
-
-        Map<String, Object> mapping = new HashMap<String, Object>();
-        mapping.put("file", directive.getParameters().get("file"));
-        mapping.put("reference", directive.getParameters().get("reference"));
-
-        Map<String, Object> context = new HashMap<String, Object>();
-        context.put("parameters", directive.getParameters());
-        context.put("file", directive.getParameters().get("file"));
-        context.put("reference", directive.getParameters().get("reference"));
-        Methods.addRuleMethods(context);
-
-        for (Argument argument : arguments) {
-            if ((argument.isRequired())
-                    && (!directive.getParameters().containsKey(
-                            argument.getIdentifier()))) {
-                throw new AraraException(
-                        CommonUtils.getRuleErrorHeader().concat(
-                                messages.getMessage(
-                                        Messages.ERROR_INTERPRETER_ARGUMENT_IS_REQUIRED,
-                                        argument.getIdentifier()
-                                )
-                        )
-                );
-            }
-
-            if (argument.getDefault() != null) {
-                try {
-                    Object result = TemplateRuntime.
-                            eval(argument.getDefault(), context);
-                    mapping.put(argument.getIdentifier(), result);
-                } catch (RuntimeException exception) {
-                    throw new AraraException(
-                            CommonUtils.getRuleErrorHeader().
-                                    concat(messages.getMessage(
-                                            Messages.ERROR_INTERPRETER_DEFAULT_VALUE_RUNTIME_ERROR
-                                    )
-                                    ),
-                            exception
-                    );
-                }
-            } else {
-                mapping.put(argument.getIdentifier(), "");
-            }
-
-            if ((argument.getFlag() != null)
-                    && (directive.getParameters().containsKey(
-                            argument.getIdentifier()))) {
-
-                try {
-                    Object result = TemplateRuntime.eval(
-                            argument.getFlag(),
-                            context
-                    );
-                    mapping.put(argument.getIdentifier(), result);
-                } catch (RuntimeException exception) {
-                    throw new AraraException(CommonUtils.getRuleErrorHeader().
-                            concat(
-                                    messages.getMessage(
-                                            Messages.ERROR_INTERPRETER_FLAG_RUNTIME_EXCEPTION
-                                    )
-                            ),
-                            exception
-                    );
-                }
-            }
-        }
-
-        return mapping;
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Language.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Language.java
deleted file mode 100644
index ff1b16a03f..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Language.java
+++ /dev/null
@@ -1,148 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.utils.CommonUtils;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-
-/**
- * Implements the language model.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Language {
-
-    // the language code, based on
-    // ISO 639-1 and language variants
-    private final String code;
-    
-    // map containing all languages
-    // supported by nightingale
-    private static final Map<String, Pair<String, Locale>> languages =
-            new HashMap<String, Pair<String, Locale>>();
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Initialize the language model. All supported languages are added in here.
-     */
-    public static void init() {
-        languages.put("en", new Pair<String, Locale>(
-                "English",
-                new Locale("en")
-        ));
-        languages.put("de", new Pair<String, Locale>(
-                "German",
-                new Locale("de")
-        ));
-        languages.put("nl", new Pair<String, Locale>(
-                "Dutch",
-                new Locale("nl")
-        ));
-        languages.put("qn", new Pair<String, Locale>(
-                "Broad Norfolk",
-                new Locale("en", "QN")
-        ));
-        languages.put("ptbr", new Pair<String, Locale>(
-                "Brazilian Portuguese",
-                new Locale("pt", "BR")
-        ));
-        languages.put("it", new Pair<String, Locale>(
-                "Italian",
-                new Locale("it")
-        ));
-    }
-
-    /**
-     * Creates a new language object. It might raise an exception if the
-     * provided language does not exist in the map.
-     * @param code The language code, based on ISO 639-1 and language variants.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public Language(String code) throws AraraException {
-        if (languages.containsKey(code)) {
-            this.code = code;
-        } else {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_LANGUAGE_INVALID_CODE,
-                            getLanguagesList()
-                    )
-            );
-        }
-    }
-
-    /**
-     * Gets the language name.
-     * @return A string representing the language name.
-     */
-    public String getName() {
-        return languages.get(code).getFirstElement();
-    }
-
-    /**
-     * Gets the language locale.
-     * @return The language locale.
-     */
-    public Locale getLocale() {
-        return languages.get(code).getSecondElement();
-    }
-
-    /**
-     * Gets a string representing the list of available languages.
-     * @return String representing the list of available languages.
-     */
-    public static String getLanguagesList() {
-        List<String> entries = new ArrayList<String>();
-        for (String key : languages.keySet()) {
-            entries.add(languages.get(key).
-                    getFirstElement().
-                    concat(": ").
-                    concat(key)
-            );
-        }
-        return CommonUtils.getCollectionElements(entries, "(", ")", ", ");
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Messages.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Messages.java
deleted file mode 100644
index 901e61be6a..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Messages.java
+++ /dev/null
@@ -1,173 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import ch.qos.cal10n.BaseName;
-import ch.qos.cal10n.Locale;
-import ch.qos.cal10n.LocaleData;
-
-/**
- * This enumeration contains all application messages.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-@BaseName("com.github.cereda.arara.localization.messages")
-@LocaleData({
-    @Locale(value = "de", charset = "UTF-8"),
-    @Locale(value = "en", charset = "UTF-8"),
-    @Locale(value = "en_QN", charset = "UTF-8"),
-    @Locale(value = "it", charset = "UTF-8"),
-    @Locale(value = "nl", charset = "UTF-8"),
-    @Locale(value = "pt_BR", charset = "UTF-8")
-})
-public enum Messages {
-
-    ERROR_BASENAME_NOT_A_FILE,
-    ERROR_CALCULATEHASH_IO_EXCEPTION,
-    ERROR_CHECKBOOLEAN_NOT_VALID_BOOLEAN,
-    ERROR_CHECKOS_INVALID_OPERATING_SYSTEM,
-    ERROR_CHECKREGEX_IO_EXCEPTION,
-    ERROR_CONFIGURATION_GENERIC_ERROR,
-    ERROR_CONFIGURATION_INVALID_YAML,
-    ERROR_CONFIGURATION_LOOPS_INVALID_RANGE,
-    ERROR_DISCOVERFILE_FILE_NOT_FOUND,
-    ERROR_EVALUATE_COMPILATION_FAILED,
-    ERROR_EVALUATE_NOT_BOOLEAN_VALUE,
-    ERROR_EXTRACTOR_IO_ERROR,
-    ERROR_FILETYPE_NOT_A_FILE,
-    ERROR_FILETYPE_UNKNOWN_EXTENSION,
-    ERROR_GETAPPLICATIONPATH_ENCODING_EXCEPTION,
-    ERROR_GETCANONICALFILE_IO_EXCEPTION,
-    ERROR_GETCANONICALPATH_IO_EXCEPTION,
-    ERROR_GETPARENTCANONICALPATH_IO_EXCEPTION,
-    ERROR_INTERPRETER_ARGUMENT_IS_REQUIRED,
-    ERROR_INTERPRETER_COMMAND_RUNTIME_ERROR,
-    ERROR_INTERPRETER_DEFAULT_VALUE_RUNTIME_ERROR,
-    ERROR_INTERPRETER_EXIT_RUNTIME_ERROR,
-    ERROR_INTERPRETER_FLAG_RUNTIME_EXCEPTION,
-    ERROR_INTERPRETER_NULL_COMMAND,
-    ERROR_INTERPRETER_RULE_NOT_FOUND,
-    ERROR_INTERPRETER_UNKNOWN_KEYS,
-    ERROR_INTERPRETER_WRONG_EXIT_CLOSURE_RETURN,
-    ERROR_ISSUBDIRECTORY_NOT_A_DIRECTORY,
-    ERROR_LANGUAGE_INVALID_CODE,
-    ERROR_LOAD_COULD_NOT_LOAD_XML,
-    ERROR_PARSER_INVALID_PREAMBLE,
-    ERROR_PARSER_LOOPS_INVALID_RANGE,
-    ERROR_PARSER_LOOPS_NAN,
-    ERROR_PARSER_TIMEOUT_INVALID_RANGE,
-    ERROR_PARSER_TIMEOUT_NAN,
-    ERROR_PARSERULE_GENERIC_ERROR,
-    ERROR_PARSERULE_INVALID_YAML,
-    ERROR_REPLICATELIST_MISSING_FORMAT_ARGUMENTS_EXCEPTION,
-    ERROR_RULE_IDENTIFIER_AND_PATH,
-    ERROR_RUN_GENERIC_EXCEPTION,
-    ERROR_RUN_INTERRUPTED_EXCEPTION,
-    ERROR_RUN_INVALID_EXIT_VALUE_EXCEPTION,
-    ERROR_RUN_IO_EXCEPTION,
-    ERROR_RUN_TIMEOUT_EXCEPTION,
-    ERROR_RUN_TIMEOUT_INVALID_RANGE,
-    ERROR_SAVE_COULD_NOT_SAVE_XML,
-    ERROR_SESSION_OBTAIN_UNKNOWN_KEY,
-    ERROR_SESSION_REMOVE_UNKNOWN_KEY,
-    ERROR_TRIGGER_ACTION_NOT_FOUND,
-    ERROR_TRIGGER_CALL_EXCEPTION,
-    ERROR_VALIDATE_EMPTY_FILES_LIST,
-    ERROR_VALIDATE_FILE_IS_RESERVED,
-    ERROR_VALIDATE_FILES_IS_NOT_A_LIST,
-    ERROR_VALIDATE_INVALID_DIRECTIVE_FORMAT,
-    ERROR_VALIDATE_NO_DIRECTIVES_FOUND,
-    ERROR_VALIDATE_ORPHAN_LINEBREAK,
-    ERROR_VALIDATE_REFERENCE_IS_RESERVED,
-    ERROR_VALIDATE_YAML_EXCEPTION,
-    ERROR_VALIDATEBODY_ARGUMENT_ID_IS_RESERVED,
-    ERROR_VALIDATEBODY_ARGUMENTS_LIST,
-    ERROR_VALIDATEBODY_DUPLICATE_ARGUMENT_IDENTIFIERS,
-    ERROR_VALIDATEBODY_MISSING_KEYS,
-    ERROR_VALIDATEBODY_NULL_ARGUMENT_ID,
-    ERROR_VALIDATEBODY_NULL_COMMAND,
-    ERROR_VALIDATEBODY_NULL_COMMANDS_LIST,
-    ERROR_VALIDATEHEADER_NULL_ID,
-    ERROR_VALIDATEHEADER_NULL_NAME,
-    ERROR_VALIDATEHEADER_WRONG_IDENTIFIER,
-    ERROR_VELOCITY_FILE_NOT_FOUND,
-    ERROR_VELOCITY_PARSE_EXCEPTION,
-    ERROR_VELOCITY_METHOD_INVOCATION_EXCEPTION,
-    ERROR_VELOCITY_IO_EXCEPTION,
-    INFO_DISPLAY_EXCEPTION_MORE_DETAILS,
-    INFO_DISPLAY_EXECUTION_TIME,
-    INFO_DISPLAY_FILE_INFORMATION,
-    INFO_INTERPRETER_DRYRUN_MODE_BOOLEAN_MODE,
-    INFO_INTERPRETER_DRYRUN_MODE_SYSTEM_COMMAND,
-    INFO_INTERPRETER_DRYRUN_MODE_TRIGGER_MODE,
-    INFO_INTERPRETER_VERBOSE_MODE_TRIGGER_MODE,
-    INFO_LABEL_AUTHOR,
-    INFO_LABEL_AUTHORS,
-    INFO_LABEL_CONDITIONAL,
-    INFO_LABEL_NO_AUTHORS,
-    INFO_LABEL_ON_DETAILS,
-    INFO_LABEL_ON_ERROR,
-    INFO_LABEL_ON_FAILURE,
-    INFO_LABEL_ON_SUCCESS,
-    INFO_LABEL_UNNAMED_TASK,
-    INFO_PARSER_ALL_RIGHTS_RESERVED,
-    INFO_PARSER_DRYRUN_MODE_DESCRIPTION,
-    INFO_PARSER_HELP_DESCRIPTION,
-    INFO_PARSER_LANGUAGE_DESCRIPTION,
-    INFO_PARSER_LOG_DESCRIPTION,
-    INFO_PARSER_LOOPS_DESCRIPTION,
-    INFO_PARSER_NOTES,
-    INFO_PARSER_ONLY_HEADER,
-    INFO_PARSER_PREAMBLE_DESCRIPTION,
-    INFO_PARSER_SILENT_MODE_DESCRIPTION,
-    INFO_PARSER_TIMEOUT_DESCRIPTION,
-    INFO_PARSER_VERBOSE_MODE_DESCRIPTION,
-    INFO_PARSER_VERSION_DESCRIPTION,
-    LOG_INFO_BEGIN_BUFFER,
-    LOG_INFO_BOOLEAN_MODE,
-    LOG_INFO_DIRECTIVES_BLOCK,
-    LOG_INFO_END_BUFFER,
-    LOG_INFO_INTERPRET_RULE,
-    LOG_INFO_INTERPRET_TASK,
-    LOG_INFO_POTENTIAL_DIRECTIVE_FOUND,
-    LOG_INFO_POTENTIAL_PATTERN_FOUND,
-    LOG_INFO_RULE_LOCATION,
-    LOG_INFO_SYSTEM_COMMAND,
-    LOG_INFO_TASK_RESULT,
-    LOG_INFO_VALIDATED_DIRECTIVES,
-    LOG_INFO_WELCOME_MESSAGE,
-    ERROR_CONFIGURATION_FILETYPE_MISSING_EXTENSION
-    
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Pair.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Pair.java
deleted file mode 100644
index 427a5fca1d..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Pair.java
+++ /dev/null
@@ -1,92 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-/**
- * Implements a pair of objects.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Pair<T, V> {
-
-    // first element of the pair
-    private final T firstElement;
-    
-    // second element of the pair
-    private final V secondElement;
-
-    /**
-     * Constructor.
-     * @param firstElement The first element.
-     * @param secondElement The second element.
-     */
-    public Pair(T firstElement, V secondElement) {
-        this.firstElement = firstElement;
-        this.secondElement = secondElement;
-    }
-
-    /**
-     * Gets the first element.
-     * @return The first element.
-     */
-    public T getFirstElement() {
-        return firstElement;
-    }
-
-    /**
-     * Gets the second element.
-     * @return The second element.
-     */
-    public V getSecondElement() {
-        return secondElement;
-    }
-    
-    /**
-     * A shorter version for getting the first element.
-     * @return The first element.
-     */
-    public T first() {
-        return getFirstElement();
-    }
-    
-    /**
-     * A shorter version for getting the second element.
-     * @return The second element.
-     */
-    public V second() {
-        return getSecondElement();
-    }
-    
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Parser.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Parser.java
deleted file mode 100644
index 681c2f8fef..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Parser.java
+++ /dev/null
@@ -1,410 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.controller.LoggingController;
-import com.github.cereda.arara.utils.CommonUtils;
-import com.github.cereda.arara.utils.DisplayUtils;
-import java.util.Locale;
-import java.util.Map;
-import org.apache.commons.cli.CommandLine;
-import org.apache.commons.cli.CommandLineParser;
-import org.apache.commons.cli.DefaultParser;
-import org.apache.commons.cli.HelpFormatter;
-import org.apache.commons.cli.Option;
-import org.apache.commons.cli.Options;
-import org.apache.commons.cli.ParseException;
-
-/**
- * Implements the command line parser.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Parser {
-
-    // command line arguments to be
-    // processed by this parser
-    private final String[] arguments;
-
-    // command line options, it will
-    // group each option available
-    // in arara
-    private Options options;
-
-    // each option available in
-    // arara
-    private Option version;
-    private Option help;
-    private Option log;
-    private Option verbose;
-    private Option silent;
-    private Option dryrun;
-    private Option timeout;
-    private Option language;
-    private Option loops;
-    private Option preamble;
-    private Option onlyheader;
-
-    public Parser() {
-        this.arguments = null;
-    }
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Constructor.
-     * @param arguments Array of strings representing the command line
-     * arguments.
-     */
-    public Parser(String[] arguments) {
-        this.arguments = arguments;
-    }
-
-    /**
-     * Parses the command line arguments.
-     * @return A boolean value indicating if the parsing should allow the
-     * application to look for directives in the provided main file.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public boolean parse() throws AraraException {
-
-        // create new instances of the
-        // command line options, including
-        // the ones that require arguments
-        version = new Option("V", "version", false, "");
-        help = new Option("h", "help", false, "");
-        log = new Option("l", "log", false, "");
-        verbose = new Option("v", "verbose", false, "");
-        silent = new Option("s", "silent", false, "");
-        dryrun = new Option("n", "dry-run", false, "");
-        timeout = new Option("t", "timeout", true, "");
-        timeout.setArgName("number");
-        language = new Option("L", "language", true, "");
-        language.setArgName("code");
-        loops = new Option("m", "max-loops", true, "");
-        loops.setArgName("number");
-        preamble = new Option("p", "preamble", true, "");
-        preamble.setArgName("name");
-        onlyheader = new Option("H", "header", false, "");
-
-        // add all options to the options
-        // group, so they are recognized
-        // by the command line parser
-        options = new Options();
-        options.addOption(version);
-        options.addOption(help);
-        options.addOption(log);
-        options.addOption(verbose);
-        options.addOption(silent);
-        options.addOption(dryrun);
-        options.addOption(timeout);
-        options.addOption(language);
-        options.addOption(loops);
-        options.addOption(preamble);
-        options.addOption(onlyheader);
-
-        // update all descriptions based
-        // on the localized messages
-        updateDescriptions();
-
-        // a new default command line
-        // parser is created and the
-        // arguments are parsed
-        CommandLineParser parser = new DefaultParser();
-
-        try {
-
-            CommandLine line = parser.parse(options, arguments);
-
-            String reference;
-            if (line.hasOption("language")) {
-                ConfigurationController.getInstance().
-                        put("execution.language",
-                                new Language(line.getOptionValue("language"))
-                        );
-                Locale locale = ((Language) ConfigurationController.
-                        getInstance().get("execution.language")).getLocale();
-                messages.setLocale(locale);
-                updateDescriptions();
-            }
-
-            if (line.hasOption("help")) {
-                printVersion();
-                printUsage();
-                return false;
-            }
-
-            if (line.hasOption("version")) {
-                printVersion();
-                printNotes();
-                return false;
-            }
-
-            if (line.getArgs().length != 1) {
-                printVersion();
-                printUsage();
-                return false;
-            } else {
-                reference = line.getArgs()[0];
-            }
-
-            if (line.hasOption("timeout")) {
-                try {
-                    long value = Long.parseLong(line.getOptionValue("timeout"));
-                    if (value <= 0) {
-                        throw new AraraException(
-                                messages.getMessage(
-                                        Messages.ERROR_PARSER_TIMEOUT_INVALID_RANGE
-                                )
-                        );
-                    } else {
-                        ConfigurationController.getInstance().
-                                put("execution.timeout", true);
-                        ConfigurationController.getInstance().
-                                put("execution.timeout.value", value);
-                    }
-                } catch (NumberFormatException nfexception) {
-                    throw new AraraException(
-                            messages.getMessage(
-                                    Messages.ERROR_PARSER_TIMEOUT_NAN
-                            )
-                    );
-                }
-            }
-
-            if (line.hasOption("max-loops")) {
-                try {
-                    long value = Long.parseLong(
-                            line.getOptionValue("max-loops")
-                    );
-                    if (value <= 0) {
-                        throw new AraraException(
-                                messages.getMessage(
-                                        Messages.ERROR_PARSER_LOOPS_INVALID_RANGE
-                                )
-                        );
-                    } else {
-                        ConfigurationController.getInstance().
-                                put("execution.loops", value);
-                    }
-                } catch (NumberFormatException nfexception) {
-                    throw new AraraException(
-                            messages.getMessage(
-                                    Messages.ERROR_PARSER_LOOPS_NAN
-                            )
-                    );
-                }
-            }
-
-            if (line.hasOption("verbose")) {
-                ConfigurationController.getInstance().
-                        put("execution.verbose", true);
-            }
-            
-            if (line.hasOption("silent")) {
-                ConfigurationController.getInstance().
-                        put("execution.verbose", false);
-            }
-
-            if (line.hasOption("dry-run")) {
-                ConfigurationController.getInstance().
-                        put("execution.dryrun", true);
-                ConfigurationController.getInstance().
-                        put("execution.errors.halt", false);
-            }
-
-            if (line.hasOption("log")) {
-                ConfigurationController.getInstance().
-                        put("execution.logging", true);
-            }
-            
-            if (line.hasOption("preamble")) {
-                @SuppressWarnings("unchecked")
-                Map<String, String> preambles = (Map<String, String>) 
-                        ConfigurationController.getInstance().
-                        get("execution.preambles");
-                if (preambles.containsKey(line.getOptionValue("preamble"))) {
-                    ConfigurationController.getInstance().
-                        put("execution.preamble.active", true);
-                    ConfigurationController.getInstance().
-                        put("execution.preamble.content",
-                                preambles.get(line.getOptionValue("preamble"))
-                        );
-                }
-                else {
-                    throw new AraraException(
-                            messages.getMessage(
-                                    Messages.ERROR_PARSER_INVALID_PREAMBLE,
-                                    line.getOptionValue("preamble")
-                            )
-                    );
-                }
-            }
-            
-            if (line.hasOption("header")) {
-                ConfigurationController.getInstance().
-                        put("execution.header", true);
-            }
-
-            CommonUtils.discoverFile(reference);
-            LoggingController.enableLogging((Boolean) ConfigurationController.
-                    getInstance().get("execution.logging"));
-            ConfigurationController.getInstance().put("display.time", true);
-
-            return true;
-
-        } catch (ParseException pexception) {
-            printVersion();
-            printUsage();
-            return false;
-        }
-    }
-
-    /**
-     * Prints the application usage.
-     */
-    private void printUsage() {
-        HelpFormatter formatter = new HelpFormatter();
-        StringBuilder builder = new StringBuilder();
-        builder.append("arara [file [--dry-run] [--log] ");
-        builder.append("[--verbose | --silent] [--timeout N] ");
-        builder.append("[--max-loops N] [--language L] ");
-        builder.append("[ --preamble P ] [--header] | --help | --version]");
-        formatter.printHelp(builder.toString(), options);
-    }
-
-    /**
-     * Prints the application version.
-     */
-    private void printVersion() {
-        String year = (String) ConfigurationController.getInstance().
-                get("application.copyright.year");
-        String number = (String) ConfigurationController.getInstance().
-                get("application.version");
-        String revision = (String) ConfigurationController.getInstance().
-                get("application.revision");
-        StringBuilder builder = new StringBuilder();
-        builder.append("arara ");
-        builder.append(number);
-        builder.append(" (revision ");
-        builder.append(revision);
-        builder.append(")");
-        builder.append("\n");
-        builder.append("Copyright (c) ").append(year).append(", ");
-        builder.append("Paulo Roberto Massa Cereda");
-        builder.append("\n");
-        builder.append(messages.getMessage(
-                Messages.INFO_PARSER_ALL_RIGHTS_RESERVED)
-        );
-        builder.append("\n");
-        System.out.println(builder.toString());
-    }
-
-    /**
-     * Print the application notes.
-     */
-    private void printNotes() {
-        DisplayUtils.wrapText(messages.getMessage(Messages.INFO_PARSER_NOTES));
-    }
-
-    /**
-     * Updates all the descriptions in order to make them reflect the current
-     * language setting.
-     */
-    private void updateDescriptions() {
-        version.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_VERSION_DESCRIPTION
-                )
-        );
-        help.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_HELP_DESCRIPTION
-                )
-        );
-        log.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_LOG_DESCRIPTION
-                )
-        );
-        verbose.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_VERBOSE_MODE_DESCRIPTION
-                )
-        );
-        silent.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_SILENT_MODE_DESCRIPTION
-                )
-        );
-        dryrun.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_DRYRUN_MODE_DESCRIPTION
-                )
-        );
-        timeout.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_TIMEOUT_DESCRIPTION
-                )
-        );
-        language.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_LANGUAGE_DESCRIPTION
-                )
-        );
-        loops.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_LOOPS_DESCRIPTION
-                )
-        );
-        preamble.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_PREAMBLE_DESCRIPTION
-                )
-        );
-        onlyheader.setDescription(
-                messages.getMessage(
-                        Messages.INFO_PARSER_ONLY_HEADER
-                )
-        );
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Resource.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Resource.java
deleted file mode 100644
index 58eaa0dc40..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Resource.java
+++ /dev/null
@@ -1,291 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.utils.CommonUtils;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import org.apache.commons.collections4.CollectionUtils;
-import org.apache.commons.collections4.Transformer;
-import org.apache.commons.lang.SystemUtils;
-import org.mvel2.templates.TemplateRuntime;
-
-/**
- * Implements the configuration resource model.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Resource {
-
-    // rule paths
-    private List<String> paths;
-    
-    // file types
-    private List<FileTypeResource> filetypes;
-    
-    // the application language
-    private String language;
-    
-    // maximum number of loops
-    private long loops;
-    
-    // verbose flag
-    private boolean verbose;
-    
-    // logging flag
-    private boolean logging;
-    
-    // database name
-    private String dbname;
-    
-    // log name
-    private String logname;
-    
-    // header flag
-    private boolean header;
-
-    // map of preambles
-    private Map<String, String> preambles;
-    
-    // look and feel
-    private String laf;
-    
-    /**
-     * Gets the rule paths.
-     * @return The rule paths.
-     */
-    public List<String> getPaths() {
-        if (paths != null) {
-            
-            final Map<String, Object> map = new HashMap<String, Object>();
-            Map<String, Object> user = new HashMap<String, Object>();
-            user.put("home", SystemUtils.USER_HOME);
-            user.put("dir", SystemUtils.USER_DIR);
-            user.put("name", SystemUtils.USER_NAME);
-            map.put("user", user);
-            
-            Collection<String> result = CollectionUtils.collect(
-                    paths, new Transformer<String, String>() {
-                public String transform(String input) {
-                    String path = CommonUtils.removeKeyword(input);
-                    try {
-                        path = (String) TemplateRuntime.eval(path, map);
-                    }
-                    catch (RuntimeException nothandled) {
-                        // do nothing, gracefully fallback to
-                        // the default, unparsed path
-                    }
-                    return path;
-                }
-            });
-            paths = new ArrayList<String>(result);
-        }
-        return paths;
-    }
-
-    /**
-     * Sets the rule paths.
-     * @param paths The rule paths.
-     */
-    public void setPaths(List<String> paths) {
-        this.paths = paths;
-    }
-
-    /**
-     * Gets the list of file types.
-     * @return The list of file types.
-     */
-    public List<FileTypeResource> getFiletypes() {
-        return filetypes;
-    }
-    
-    /**
-     * Sets the list of file types.
-     * @param filetypes The list of file types.
-     */
-    public void setFiletypes(List<FileTypeResource> filetypes) {
-        this.filetypes = filetypes;
-    }
-
-    /**
-     * Gets the language.
-     * @return The language.
-     */
-    public String getLanguage() {
-        return CommonUtils.removeKeyword(language);
-    }
-
-    /**
-     * Sets the language.
-     * @param language The language.
-     */
-    public void setLanguage(String language) {
-        this.language = language;
-    }
-
-    /**
-     * Get the maximum number of loops.
-     * @return The maximum number of loops.
-     */
-    public long getLoops() {
-        return loops;
-    }
-
-    /**
-     * Sets the maximum number of loops.
-     * @param loops The maximum number of loops.
-     */
-    public void setLoops(long loops) {
-        this.loops = loops;
-    }
-
-    /**
-     * Checks if verbose mode is active.
-     * @return A boolean value.
-     */
-    public boolean isVerbose() {
-        return verbose;
-    }
-
-    /**
-     * Sets the verbose mode.
-     * @param verbose A boolean value.
-     */
-    public void setVerbose(boolean verbose) {
-        this.verbose = verbose;
-    }
-
-    /**
-     * Checks if logging mode is active.
-     * @return A boolean value.
-     */
-    public boolean isLogging() {
-        return logging;
-    }
-
-    /**
-     * Sets the logging mode.
-     * @param logging A boolean value.
-     */
-    public void setLogging(boolean logging) {
-        this.logging = logging;
-    }
-
-    /**
-     * Gets the database name.
-     * @return The database name.
-     */
-    public String getDbname() {
-        return CommonUtils.removeKeyword(dbname);
-    }
-
-    /**
-     * Sets the database name.
-     * @param dbname The database name.
-     */
-    public void setDbname(String dbname) {
-        this.dbname = dbname;
-    }
-
-    /**
-     * Gets the log name.
-     * @return The log name.
-     */
-    public String getLogname() {
-        return CommonUtils.removeKeyword(logname);
-    }
-
-    /**
-     * Sets the log name.
-     * @param logname The log name.
-     */
-    public void setLogname(String logname) {
-        this.logname = logname;
-    }
-
-    /**
-     * Gets the map of preambles.
-     * @return Map of preambles.
-     */
-    public Map<String, String> getPreambles() {
-        return preambles;
-    }
-
-    /**
-     * Sets the map of preambles.
-     * @param preambles Map of preambles.
-     */
-    public void setPreambles(Map<String, String> preambles) {
-        this.preambles = preambles;
-    }
-
-    /**
-     * Gets the logical value of the header flag.
-     * @return Logical value of the header flag.
-     */
-    public boolean isHeader() {
-        return header;
-    }
-
-    /**
-     * Sets the logical value of the header flag.
-     * @param header The header flag.
-     */
-    public void setHeader(boolean header) {
-        this.header = header;
-    }
-
-    /**
-     * Gets the look and feel reference.
-     * @return The look and feel reference.
-     */
-    public String getLaf() {
-        return CommonUtils.removeKeyword(laf);
-    }
-
-    /**
-     * Sets the look and feel reference.
-     * @param laf The look and feel reference.
-     */
-    public void setLaf(String laf) {
-        this.laf = laf;
-    }
-    
-    
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Rule.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Rule.java
deleted file mode 100644
index acf43cdf58..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Rule.java
+++ /dev/null
@@ -1,155 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.utils.CommonUtils;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.List;
-import org.apache.commons.collections4.CollectionUtils;
-import org.apache.commons.collections4.Transformer;
-
-/**
- * Implements the rule model.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Rule {
-
-    // the rule identifier
-    private String identifier;
-    
-    // the rule name
-    private String name;
-    
-    // the list of authors
-    private List<String> authors;
-    
-    // the list of commands
-    private List<RuleCommand> commands;
-    
-    // the list of arguments
-    private List<Argument> arguments;
-
-    /**
-     * Gets the rule identifier.
-     * @return The rule identifier.
-     */
-    public String getIdentifier() {
-        return CommonUtils.removeKeyword(identifier);
-    }
-
-    /**
-     * Sets the rule identifier.
-     * @param identifier The rule identifier.
-     */
-    public void setIdentifier(String identifier) {
-        this.identifier = identifier;
-    }
-
-    /**
-     * Gets the rule identifier.
-     * @return The rule identifier.
-     */
-    public String getName() {
-        return CommonUtils.removeKeyword(name);
-    }
-
-    /**
-     * Sets the rule name.
-     * @param name The rule name.
-     */
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    /**
-     * Gets the list of authors.
-     * @return A list of authors.
-     */
-    public List<String> getAuthors() {
-        if (authors != null) {
-            Collection<String> result = CollectionUtils.collect(
-                    authors, new Transformer<String, String>() {
-                public String transform(String input) {
-                    return CommonUtils.removeKeyword(input);
-                }
-            });
-            authors = new ArrayList<String>(result);
-        }
-        return authors;
-    }
-
-    /**
-     * Sets the list of authors.
-     * @param authors The list of authors.
-     */
-    public void setAuthors(List<String> authors) {
-        this.authors = authors;
-    }
-
-    /**
-     * Gets the list of commands.
-     * @return The list of commands.
-     */
-    public List<RuleCommand> getCommands() {
-        return commands;
-    }
-
-    /**
-     * Sets the list of commands.
-     * @param commands The list of commands.
-     */
-    public void setCommands(List<RuleCommand> commands) {
-        this.commands = commands;
-    }
-
-    /**
-     * Gets the list of arguments.
-     * @return The list of arguments.
-     */
-    public List<Argument> getArguments() {
-        return arguments;
-    }
-
-    /**
-     * Sets the list of arguments.
-     * @param arguments The list of arguments.
-     */
-    public void setArguments(List<Argument> arguments) {
-        this.arguments = arguments;
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/RuleCommand.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/RuleCommand.java
deleted file mode 100644
index e63430afeb..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/RuleCommand.java
+++ /dev/null
@@ -1,103 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.utils.CommonUtils;
-
-/**
- * Implements the rule command model.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class RuleCommand {
-
-    // the command name
-    private String name;
-    
-    // the command instruction
-    private String command;
-    
-    // the exit status expression
-    private String exit;
-
-    /**
-     * Gets the command name.
-     * @return The command name.
-     */
-    public String getName() {
-        return CommonUtils.removeKeyword(name);
-    }
-
-    /**
-     * Sets the command name.
-     * @param name The command name.
-     */
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    /**
-     * Gets the command instruction.
-     * @return The command instruction.
-     */
-    public String getCommand() {
-        return CommonUtils.removeKeyword(command);
-    }
-
-    /**
-     * Sets the command instruction.
-     * @param command The command instruction.
-     */
-    public void setCommand(String command) {
-        this.command = command;
-    }
-
-    /**
-     * Gets the exit status expression.
-     * @return The exit status expression.
-     */
-    public String getExit() {
-        return CommonUtils.removeKeyword(exit);
-    }
-
-    /**
-     * Sets the exit status expression.
-     * @param exit The exit status expression.
-     */
-    public void setExit(String exit) {
-        this.exit = exit;
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Session.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Session.java
deleted file mode 100644
index 4462c5e369..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Session.java
+++ /dev/null
@@ -1,122 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.controller.SessionController;
-
-/**
- * Implements the session model.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Session {
-
-    // get the current instance from the
-    // session controller
-    private static final SessionController session =
-            SessionController.getInstance();
-    
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Inserts the object into the session, indexed by the provided key.
-     * @param key The provided key.
-     * @param value The value to be inserted.
-     */
-    public void insert(String key, Object value) {
-        session.put(key, value);
-    }
-
-    /**
-     * Removes the entry indexed by the provided key from the session.
-     * @param key The provided key.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public void remove(String key) throws AraraException {
-        if (session.contains(key)) {
-            session.remove(key);
-        } else {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_SESSION_REMOVE_UNKNOWN_KEY,
-                            key
-                    )
-            );
-        }
-    }
-
-    /**
-     * Checks if the provided key exists in the session.
-     * @param key The provided key.
-     * @return A boolean value indicating if the provided key exists in the
-     * session.
-     */
-    public boolean exists(String key) {
-        return session.contains(key);
-    }
-
-    /**
-     * Clears the session.
-     */
-    public void forget() {
-        session.clear();
-    }
-
-    /**
-     * Gets the object indexed by the provided key from the session.
-     * @param key The provided key.
-     * @return The object indexed by the provided key.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public Object obtain(String key) throws AraraException {
-        if (session.contains(key)) {
-            return session.get(key);
-        } else {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_SESSION_OBTAIN_UNKNOWN_KEY,
-                            key
-                    )
-            );
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/StopWatch.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/StopWatch.java
deleted file mode 100644
index da7062cf19..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/StopWatch.java
+++ /dev/null
@@ -1,84 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-
-/**
- * Implements a stopwatch.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class StopWatch {
-
-    // two variables indicating the
-    // times the stopwatch started
-    // and stopped
-    private static long beginning = 0;
-    private static long end = 0;
-    
-    // a variable to indicate the
-    // stopwatch is enabled; so far,
-    // it hasn't started, then it is
-    // not enabled
-    private static boolean enabled = false;
-
-    /**
-     * Starts the stopwatch.
-     */
-    public static void start() {
-        beginning = System.nanoTime();
-        enabled = true;
-    }
-
-    /**
-     * Stops the stopwatch.
-     */
-    public static void stop() {
-        end = System.nanoTime();
-    }
-
-    /**
-     * Gets the string representation of the elapsed time.
-     * @return A string representation of the elapsed time.
-     */
-    public static String getTime() {
-        Language language = (Language) ConfigurationController.
-                getInstance().get("execution.language");
-        double result = enabled ? (double) (end - beginning) / 1000000000 : 0.0;
-        return String.format(language.getLocale(), "%1.2f", result);
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Trigger.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Trigger.java
deleted file mode 100644
index 7d8ae6ce79..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Trigger.java
+++ /dev/null
@@ -1,135 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.Callable;
-
-/**
- * Implements the trigger model. The tool provides triggers, which are a way
- * to alter its internal behaviour according to a list of parameters.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Trigger {
-
-    // the action name and its
-    // list of parameters
-    private final String action;
-    private final List<Object> parameters;
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Constructor.
-     * @param action The action name.
-     * @param parameters The list of parameters.
-     */
-    public Trigger(String action, List<Object> parameters) {
-        this.action = action;
-        this.parameters = parameters;
-    }
-
-    /**
-     * Gets the action name.
-     * @return The action name.
-     */
-    public String getAction() {
-        return action;
-    }
-
-    /**
-     * Gets the list of parameters.
-     * @return The list of parameters.
-     */
-    public List<Object> getParameters() {
-        return parameters;
-    }
-
-    /**
-     * Returns a textual representation of the current trigger.
-     * @return A string containing a textual representation of the current
-     * trigger.
-     */
-    @Override
-    public String toString() {
-        return "trigger";
-    }
-
-    /**
-     * Processes the current trigger.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public void process() throws AraraException {
-
-        Map<String, Callable<Object>> mapping =
-                new HashMap<String, Callable<Object>>();
-        mapping.put("halt", new Callable<Object>() {
-            public Object call() {
-                ConfigurationController.getInstance().put("trigger.halt", true);
-                return null;
-            }
-        });
-        if (mapping.containsKey(action)) {
-            try {
-                mapping.get(action).call();
-            } catch (Exception exception) {
-                throw new AraraException(
-                        messages.getMessage(
-                                Messages.ERROR_TRIGGER_CALL_EXCEPTION,
-                                action
-                        ),
-                        exception
-                );
-            }
-        } else {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_TRIGGER_ACTION_NOT_FOUND,
-                            action
-                    )
-            );
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/ClassLoadingUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/ClassLoadingUtils.java
deleted file mode 100644
index fdd642e21d..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/ClassLoadingUtils.java
+++ /dev/null
@@ -1,166 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.model.Pair;
-import java.io.File;
-import java.net.MalformedURLException;
-import java.net.URL;
-import java.net.URLClassLoader;
-
-/**
- * Implements utilitary methods for classloading and object instantiation.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class ClassLoadingUtils {
-
-    /**
-     * Loads a class from the provided file, potentially a Java archive.
-     * @param file File containing the Java bytecode (namely, a JAR).
-     * @param name The canonical name of the class.
-     * @return A pair representing the status and the class.
-     */
-    public static Pair<Integer, Class> loadClass(File file, String name) {
-
-        // status and class to be returned,
-        // it defaults to an object class
-        int status = 0;
-        Class value = Object.class;
-
-        // if file does not exist, nothing
-        // can be done, status is changed
-        if (!file.exists()) {
-            status = 1;
-        } else {
-            
-            // classloading involves defining
-            // a classloader and fetching the
-            // desired class from it, based on
-            // the provided file archive
-            try {
-                
-                // creates a new classloader with
-                // the provided file (potentially
-                // a JAR file)
-                URLClassLoader classloader = new URLClassLoader(
-                        new URL[]{
-                            file.toURI().toURL()
-                        },
-                        ClassLoadingUtils.class.getClassLoader()
-                );
-                
-                // fetches the class from the
-                // instantiated classloader
-                value = Class.forName(name, true, classloader);
-                
-            } catch (MalformedURLException nothandled1) {
-                
-                // the file URL is incorrect,
-                // update status accordingly
-                status = 2;
-                
-            } catch (ClassNotFoundException nothandled2) {
-                
-                // the class was not found,
-                // update status accordingly
-                status = 3;
-                
-            }
-        }
-
-        // return a new pair based on the
-        // current status and class holder
-        return new Pair<Integer, Class>(status, value);
-    }
-
-    /**
-     * Loads a class from the provided file, instantiating it.
-     * @param file File containing the Java bytecode (namely, a JAR).
-     * @param name The canonical name of the class.
-     * @return A pair representing the status and the class object.
-     */
-    public static Pair<Integer, Object> loadObject(File file, String name) {
-
-        // load the corresponding class
-        // based on the qualified name
-        Pair<Integer, Class> pair = loadClass(file, name);
-
-        // status and object to be returned,
-        // it defaults to an object
-        int status = pair.getFirstElement();
-        Object value = new Object();
-
-        // checks if the class actually
-        // exists, otherwise simply
-        // ignore instantiation
-        if (status == 0) {
-            
-            // object instantiation relies
-            // on the default constructor
-            // (without arguments), class
-            // must implement it
-            
-            // OBS: constructors with arguments
-            // must be invoked through reflection
-            try {
-                
-                // get the class reference from
-                // the pair and instantiate it
-                // by invoking the default
-                // constructor (without arguments)
-                value = pair.getSecondElement().newInstance();
-                
-            } catch (IllegalAccessException nothandled1) {
-                
-                // the object instantiation violated
-                // an access policy, status is updated
-                status = 4;
-                
-            } catch (InstantiationException nothandled2) {
-                
-                // an instantiation exception has
-                // occurred, status is updated
-                status = 5;
-                
-            }
-        }
-
-        // return a new pair based on the
-        // current status and object holder
-        return new Pair<Integer, Object>(status, value);
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/CommonUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/CommonUtils.java
deleted file mode 100644
index 0263f64eac..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/CommonUtils.java
+++ /dev/null
@@ -1,954 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.controller.SystemCallController;
-import com.github.cereda.arara.model.AraraException;
-import com.github.cereda.arara.model.Argument;
-import com.github.cereda.arara.model.Database;
-import com.github.cereda.arara.model.FileType;
-import com.github.cereda.arara.model.Messages;
-import java.io.File;
-import java.io.IOException;
-import java.nio.charset.Charset;
-import java.text.SimpleDateFormat;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.MissingFormatArgumentException;
-import java.util.Set;
-import java.util.StringTokenizer;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-import org.apache.commons.collections4.CollectionUtils;
-import org.apache.commons.collections4.Transformer;
-import org.apache.commons.io.FileUtils;
-import org.apache.commons.io.filefilter.NameFileFilter;
-import org.apache.commons.lang.StringUtils;
-import org.apache.commons.lang.SystemUtils;
-
-/**
- * Implements common utilitary methods.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class CommonUtils {
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Checks if the input string is equal to a valid boolean value.
-     * @param value The input string.
-     * @return A boolean value represented by the provided string.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean checkBoolean(String value) throws AraraException {
-        List<String> yes = Arrays.asList(
-                new String[]{"yes", "true", "1", "on"}
-        );
-        List<String> no = Arrays.asList(
-                new String[]{"no", "false", "0", "off"}
-        );
-        if (!union(yes, no).contains(value.toLowerCase())) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_CHECKBOOLEAN_NOT_VALID_BOOLEAN,
-                            value
-                    )
-            );
-        } else {
-            return yes.contains(value.toLowerCase());
-        }
-    }
-
-    /**
-     * Provides a union set operation between two lists.
-     * @param <T> The list type.
-     * @param list1 The first list.
-     * @param list2 The second list.
-     * @return The union of those two lists.
-     */
-    private static <T> List<T> union(List<T> list1, List<T> list2) {
-        Set<T> elements = new HashSet<T>();
-        elements.addAll(list1);
-        elements.addAll(list2);
-        return new ArrayList<T>(elements);
-    }
-
-    /**
-     * Build a system-dependant path based on the path and the file.
-     * @param path A string representing the path to be prepended.
-     * @param file A string representing the file to be appended.
-     * @return The full path as a string.
-     */
-    public static String buildPath(String path, String file) {
-        return path.endsWith(File.separator) ?
-                path.concat(file) : path.concat(File.separator).concat(file);
-    }
-
-    /**
-     * Checks if the provided string is empty. It does not handle a null value.
-     * @param string A string.
-     * @return A boolean value indicating if the string is empty.
-     */
-    public static boolean checkEmptyString(String string) {
-        return "".equals(string);
-    }
-
-    /**
-     * Removes the keyword from the beginning of the provided string.
-     * @param line A string to be analyzed.
-     * @return The provided string without the keyword.
-     */
-    public static String removeKeyword(String line) {
-        if (line != null) {
-            Pattern pattern = Pattern.compile("^(\\s)*<arara>\\s");
-            Matcher matcher = pattern.matcher(line);
-            if (matcher.find()) {
-                line = (line.substring(matcher.end(), line.length()));
-            }
-            line = line.trim();
-        }
-        return line;
-    }
-
-    /**
-     * Discovers the file through string reference lookup and sets the
-     * configuration accordingly.
-     * @param reference The string reference.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static void discoverFile(String reference) throws AraraException {
-        File file = lookupFile(reference);
-        if (file == null) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_DISCOVERFILE_FILE_NOT_FOUND,
-                            reference,
-                            getFileTypesList()
-                    )
-            );
-        }
-    }
-
-    /**
-     * Performs a file lookup based on a string reference.
-     * @param reference The file reference as a string.
-     * @return The file as result of the lookup operation.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private static File lookupFile(String reference) throws AraraException {
-        @SuppressWarnings("unchecked")
-        List<FileType> types = (List<FileType>) ConfigurationController.
-                getInstance().get("execution.filetypes");
-        File file = new File(reference);
-        String name = file.getName();
-        String parent = getParentCanonicalPath(file);
-        String path = buildPath(parent, name);
-        
-        // direct search, so we are considering
-        // the reference as a complete name
-        for (FileType type : types) {
-            if (path.endsWith(".".concat(type.getExtension()))) {
-                file = new File(path);
-                if (file.exists()) {
-                    if (file.isFile()) {
-                        ConfigurationController.
-                                getInstance().
-                                put("execution.file.pattern",
-                                        type.getPattern());
-                        ConfigurationController.
-                                getInstance().
-                                put("execution.reference", file);
-                        return file;
-                    }
-                }
-            }
-        }
-        
-        // indirect search; in this case, we are considering
-        // that the file reference has an implict extension,
-        // so we need to add it and look again
-        for (FileType type : types) {
-            path = buildPath(parent, name.concat(".").
-                    concat(type.getExtension()));
-            file = new File(path);
-            if (file.exists()) {
-                if (file.isFile()) {
-                    ConfigurationController.getInstance().
-                            put("execution.file.pattern", type.getPattern());
-                    ConfigurationController.getInstance().
-                            put("execution.reference", file);
-                    return file;
-                }
-            }
-        }
-        return null;
-    }
-
-    /**
-     * Gets the parent canonical path of a file.
-     * @param file The file.
-     * @return The parent canonical path of a file.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static String getParentCanonicalPath(File file)
-            throws AraraException {
-        try {
-            String path = file.getCanonicalFile().getParent();
-            return path;
-        } catch (IOException exception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_GETPARENTCANONICALPATH_IO_EXCEPTION
-                    ),
-                    exception
-            );
-        }
-    }
-
-    /**
-     * Gets the canonical file from a file.
-     * @param file The file.
-     * @return The canonical file.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static File getCanonicalFile(String file) throws AraraException {
-        try {
-            return (new File(file)).getCanonicalFile();
-        } catch (IOException exception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_GETCANONICALFILE_IO_EXCEPTION
-                    ),
-                    exception
-            );
-        }
-    }
-
-    /**
-     * Checks if the provided object is from a certain class.
-     * @param clazz The class.
-     * @param object The object.
-     * @return A boolean value indicating if the provided object is from a
-     * certain class.
-     */
-    public static boolean checkClass(Class clazz, Object object) {
-        return clazz.isInstance(object);
-    }
-
-    /**
-     * Helper method to flatten a potential list of lists into a list of
-     * objects.
-     * @param list First list.
-     * @param flat Second list.
-     */
-    private static void flatten(List<?> list, List<Object> flat) {
-        for (Object item : list) {
-            if (item instanceof List<?>) {
-                flatten((List<?>) item, flat);
-            } else {
-                flat.add(item);
-            }
-        }
-    }
-
-    /**
-     * Flattens a potential list of lists into a list of objects.
-     * @param list The list to be flattened.
-     * @return The flattened list.
-     */
-    public static List<Object> flatten(List<?> list) {
-        List<Object> result = new ArrayList<Object>();
-        flatten(list, result);
-        return result;
-    }
-
-    /**
-     * Gets the list of file types, in order.
-     * @return A string representation of the list of file types, in order.
-     */
-    public static String getFileTypesList() {
-        @SuppressWarnings("unchecked")
-        List<FileType> types = (List<FileType>) ConfigurationController.
-                getInstance().get("execution.filetypes");
-        return getCollectionElements(types, "[ ", " ]", " | ");
-    }
-
-    /**
-     * Gets a string representation of a collection.
-     * @param collection The collection.
-     * @param open The opening string.
-     * @param close The closing string.
-     * @param separator The element separator.
-     * @return A string representation of the provided collection.
-     */
-    public static String getCollectionElements(Collection collection,
-            String open, String close, String separator) {
-        StringBuilder builder = new StringBuilder();
-        builder.append(open);
-        builder.append(StringUtils.join(collection, separator));
-        builder.append(close);
-        return builder.toString();
-    }
-
-    /**
-     * Gets a set of strings containing unknown keys from a map and a list. It
-     * is a set difference from the keys in the map and the entries in the list.
-     * @param parameters The map of parameters.
-     * @param arguments The list of arguments.
-     * @return A set of strings representing unknown keys from a map and a list.
-     */
-    public static Set<String> getUnknownKeys(Map<String, Object> parameters,
-            List<Argument> arguments) {
-        Collection<String> found = parameters.keySet();
-        Collection<String> expected = CollectionUtils.collect(
-                arguments, new Transformer<Argument, String>() {
-            public String transform(Argument argument) {
-                return argument.getIdentifier();
-            }
-        });
-        Collection<String> difference = CollectionUtils.
-                subtract(found, expected);
-        return new HashSet<String>(difference);
-    }
-
-    /**
-     * Gets the rule error header, containing the identifier and the path, if
-     * any.
-     * @return A string representation of the rule error header, containing the
-     * identifier and the path, if any.
-     */
-    public static String getRuleErrorHeader() {
-        if ((ConfigurationController.getInstance().
-                contains("execution.info.rule.id")) &&
-                (ConfigurationController.getInstance().
-                        contains("execution.info.rule.path"))) {
-            String id = (String) ConfigurationController.getInstance().
-                    get("execution.info.rule.id");
-            String path = (String) ConfigurationController.getInstance().
-                    get("execution.info.rule.path");
-            return messages.getMessage(
-                    Messages.ERROR_RULE_IDENTIFIER_AND_PATH,
-                    id,
-                    path
-            ).concat(" ");
-        } else {
-            return "";
-        }
-    }
-
-    /**
-     * Trims spaces from every string of a list of strings.
-     * @param input The list of strings.
-     * @return A new list of strings, with each element trimmed.
-     */
-    public static List<String> trimSpaces(List<String> input) {
-        Collection<String> result = CollectionUtils.collect(
-                input, new Transformer<String, String>() {
-            public String transform(String input) {
-                return input.trim();
-            }
-        });
-        return new ArrayList<String>(result);
-    }
-
-    /**
-     * Gets a human readable representation of a file size.
-     * @param file The file.
-     * @return A string representation of the file size.
-     */
-    public static String calculateFileSize(File file) {
-        return FileUtils.byteCountToDisplaySize(file.length());
-    }
-
-    /**
-     * Gets the date the provided file was last modified.
-     * @param file The file.
-     * @return A string representation of the date the provided file was last
-     * modified.
-     */
-    public static String getLastModifiedInformation(File file) {
-        SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
-        return format.format(file.lastModified());
-    }
-
-    /**
-     * Gets a list of all rule paths.
-     * @return A list of all rule paths.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static List<String> getAllRulePaths() throws AraraException {
-        @SuppressWarnings("unchecked")
-        List<String> paths = (List<String>) ConfigurationController.
-                getInstance().get("execution.rule.paths");
-        List<String> result = new ArrayList<String>();
-        for (String path : paths) {
-            File location = new File(InterpreterUtils.construct(path, "quack"));
-            result.add(getParentCanonicalPath(location));
-        }
-        return result;
-    }
-
-     /**
-     * Gets the reference of the current file in execution. Note that this
-     * method might return a value different than the main file provided in
-     * the command line.
-     * @return A reference of the current file in execution. Might be different
-     * than the main file provided in the command line.
-     */
-    private static File getCurrentReference() {
-        return (File) ConfigurationController.getInstance().
-                get("execution.file");
-    }
-
-    /**
-     * Calculates the CRC32 checksum of the provided file.
-     * @param file The file.
-     * @return A string containing the CRC32 checksum of the provided file.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static String calculateHash(File file) throws AraraException {
-        try {
-            long result = FileUtils.checksumCRC32(file);
-            return String.format("%08x", result);
-        } catch (IOException exception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_CALCULATEHASH_IO_EXCEPTION
-                    ),
-                    exception
-            );
-        }
-    }
-
-    /**
-     * Gets the file type of a file.
-     * @param file The file.
-     * @return The corresponding file type.
-     */
-    public static String getFiletype(File file) {
-        return getFiletype(file.getName());
-    }
-
-    /**
-     * Gets the file type of a string representing the file.
-     * @param name A string representing the file.
-     * @return The corresponding file type.
-     */
-    public static String getFiletype(String name) {
-        name = name.lastIndexOf(".") != -1 ?
-                name.substring(name.lastIndexOf(".") + 1, name.length()) : "";
-        return name;
-    }
-
-    /**
-     * Gets the base name of a file.
-     * @param file The file.
-     * @return The corresponding base name.
-     */
-    public static String getBasename(File file) {
-        return getBasename(file.getName());
-    }
-
-    /**
-     * Gets the base name of a string representing the file.
-     * @param name A string representing the file.
-     * @return The corresponding base name.
-     */
-    public static String getBasename(String name) {
-        int index = name.lastIndexOf(".") != -1 ?
-                name.lastIndexOf(".") : name.length();
-        return name.substring(0, index);
-    }
-
-    /**
-     * Encloses the provided object in double quotes.
-     * @param object The object.
-     * @return A string representation of the provided object enclosed in double
-     * quotes.
-     */
-    public static String addQuotes(Object object) {
-        return "\"".concat(String.valueOf(object)).concat("\"");
-    }
-
-    /**
-     * Generates a string based on a list of objects, separating each one of
-     * them by one space.
-     * @param objects A list of objects.
-     * @return A string based on the list of objects, separating each one of
-     * them by one space. Empty values are not considered.
-     */
-    public static String generateString(Object... objects) {
-        List<String> values = new ArrayList<String>();
-        for (Object object : objects) {
-            if (!CommonUtils.checkEmptyString(String.valueOf(object))) {
-                values.add(String.valueOf(object));
-            }
-        }
-        return StringUtils.join(values, " ");
-    }
-
-    /**
-     * Checks if a file exists.
-     * @param file The file.
-     * @return A boolean value indicating if the file exists.
-     */
-    public static boolean exists(File file) {
-        return file.exists();
-    }
-
-    /**
-     * Checks if a file exists based on its extension.
-     * @param extension The extension.
-     * @return A boolean value indicating if the file exists.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean exists(String extension) throws AraraException {
-        File file = new File(getPath(extension));
-        return file.exists();
-    }
-
-    /**
-     * Checks if a file has changed since the last verification.
-     * @param file The file.
-     * @return A boolean value indicating if the file has changed since the last
-     * verification.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean hasChanged(File file) throws AraraException {
-        Database database = DatabaseUtils.load();
-        HashMap<String, String> map = database.getMap();
-        String path = getCanonicalPath(file);
-        if (!file.exists()) {
-            if (map.containsKey(path)) {
-                map.remove(path);
-                database.setMap(map);
-                DatabaseUtils.save(database);
-                return true;
-            } else {
-                return false;
-            }
-        } else {
-            String hash = calculateHash(file);
-            if (map.containsKey(path)) {
-                String value = map.get(path);
-                if (hash.equals(value)) {
-                    return false;
-                } else {
-                    map.put(path, hash);
-                    database.setMap(map);
-                    DatabaseUtils.save(database);
-                    return true;
-                }
-            } else {
-                map.put(path, hash);
-                database.setMap(map);
-                DatabaseUtils.save(database);
-                return true;
-            }
-        }
-    }
-
-    /**
-     * Checks if the file has changed since the last verification based on the
-     * provided extension.
-     * @param extension The provided extension.
-     * @return A boolean value indicating if the file has changed since the last
-     * verification.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean hasChanged(String extension) throws AraraException {
-        File file = new File(getPath(extension));
-        return hasChanged(file);
-    }
-
-    /**
-     * Gets the full file path based on the provided extension.
-     * @param extension The extension.
-     * @return A string containing the full file path.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private static String getPath(String extension) throws AraraException {
-        String name = getBasename(getCurrentReference());
-        String path = getParentCanonicalPath(getCurrentReference());
-        name = name.concat(".").concat(extension);
-        return buildPath(path, name);
-    }
-
-    /**
-     * Gets the canonical path from the provided file.
-     * @param file The file.
-     * @return The canonical path from the provided file.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static String getCanonicalPath(File file) throws AraraException {
-        try {
-            return file.getCanonicalPath();
-        } catch (IOException exception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_GETCANONICALPATH_IO_EXCEPTION
-                    ),
-                    exception
-            );
-        }
-    }
-
-    /**
-     * Checks if the file based on the provided extension contains the provided
-     * regex.
-     * @param extension The file extension.
-     * @param regex The regex.
-     * @return A boolean value indicating if the file contains the provided
-     * regex.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean checkRegex(String extension, String regex)
-            throws AraraException {
-        File file = new File(getPath(extension));
-        return checkRegex(file, regex);
-    }
-
-    /**
-     * Checks if the file contains the provided regex.
-     * @param file The file.
-     * @param regex The regex.
-     * @return A boolean value indicating if the file contains the provided
-     * regex.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean checkRegex(File file, String regex)
-            throws AraraException {
-        Charset charset = (Charset) ConfigurationController.
-                getInstance().get("directives.charset");
-        try {
-            String text = FileUtils.readFileToString(file, charset.name());
-            Pattern pattern = Pattern.compile(regex);
-            Matcher matcher = pattern.matcher(text);
-            return matcher.find();
-        } catch (IOException exception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_CHECKREGEX_IO_EXCEPTION,
-                            file.getName()
-                    ),
-                    exception
-            );
-        }
-    }
-
-    /**
-     * Replicates a string pattern based on a list of objects, generating a list
-     * as result.
-     * @param pattern The string pattern.
-     * @param values The list of objects to be merged with the pattern.
-     * @return A list containing the string pattern replicated to each object
-     * from the list.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static List<Object> replicateList(String pattern,
-            List<Object> values) throws AraraException {
-        List<Object> result = new ArrayList<Object>();
-        for (Object value : values) {
-            try {
-                result.add(String.format(pattern, value));
-            } catch (MissingFormatArgumentException exception) {
-                throw new AraraException(
-                        messages.getMessage(
-                                Messages.ERROR_REPLICATELIST_MISSING_FORMAT_ARGUMENTS_EXCEPTION
-                        ),
-                        exception
-                );
-            }
-        }
-        return result;
-    }
-
-    /**
-     * Checks if the provided operating system string holds according to the
-     * underlying operating system.
-     * @param value A string representing an operating system.
-     * @return A boolean value indicating if the provided string refers to the
-     * underlying operating system.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean checkOS(String value) throws AraraException {
-        Map<String, Boolean> values = new HashMap<String, Boolean>();
-        values.put("windows", SystemUtils.IS_OS_WINDOWS);
-        values.put("linux", SystemUtils.IS_OS_LINUX);
-        values.put("mac", SystemUtils.IS_OS_MAC_OSX);
-        values.put("unix", SystemUtils.IS_OS_UNIX);
-        values.put("aix", SystemUtils.IS_OS_AIX);
-        values.put("irix", SystemUtils.IS_OS_IRIX);
-        values.put("os2", SystemUtils.IS_OS_OS2);
-        values.put("solaris", SystemUtils.IS_OS_SOLARIS);
-        values.put("cygwin", (Boolean) SystemCallController.
-                getInstance().get("cygwin"));
-        if (!values.containsKey(value.toLowerCase())) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_CHECKOS_INVALID_OPERATING_SYSTEM,
-                            value
-                    )
-            );
-        }
-        return values.get(value.toLowerCase());
-    }
-    
-    /**
-     * Returns the exit status of the application.
-     * @return An integer representing the exit status of the application.
-     */
-    public static int getExitStatus() {
-        return (Integer) ConfigurationController.
-                getInstance().get("execution.status");
-    }
-    
-    /**
-     * Gets the system property according to the provided key, or resort to the
-     * fallback value if an exception is thrown or if the key is invalid.
-     * @param key The system property key.
-     * @param fallback The fallback value.
-     * @return A string containing the system property value or the fallback.
-     */
-    public static String getSystemProperty(String key, String fallback) {
-        try {
-            String result = System.getProperty(key, fallback);
-            return result.equals("") ? fallback : result;
-        } catch (Exception exception) {
-            return fallback;
-        }
-    }
-    
-    /**
-     * Gets the preamble content, converting a single string into a list of
-     * strings, based on new lines.
-     * @return A list of strings representing the preamble content.
-     */
-    public static List<String> getPreambleContent() {
-        if (((Boolean) ConfigurationController.
-                    getInstance().get("execution.preamble.active")) == true) {
-            return new ArrayList<String>(
-                    Arrays.asList(
-                            ((String) ConfigurationController.getInstance().
-                                    get("execution.preamble.content")
-                            ).split("\n"))
-            );
-        }
-        else {
-            return new ArrayList<String>();
-        }
-    }
-    
-    /**
-     * Generates a list of filenames from the provided command based on a list
-     * of extensions for each underlying operating system.
-     * @param command A string representing the command.
-     * @return A list of filenames.
-     */
-    private static List<String> appendExtensions(String command) {
-        
-        // the resulting list, to hold the
-        // filenames generated from the
-        // provided command
-        List<String> result = new ArrayList<String>();
-        
-        // list of extensions, specific for
-        // each operating system (in fact, it
-        // is more Windows specific)
-        List<String> extensions;
-        
-        // the application is running on
-        // Windows, so let's look for the
-        // following extensions in order
-        if (SystemUtils.IS_OS_WINDOWS) {
-            
-            // this list is actually a sublist from
-            // the original Windows PATHEXT environment
-            // variable which holds the list of executable
-            // extensions that Windows supports
-            extensions = Arrays.asList(".com", ".exe", ".bat", ".cmd");
-        }
-        else {
-            
-            // no Windows, so the default
-            // extension will be just an
-            // empty string
-            extensions = Arrays.asList("");
-        }
-        
-        // for each and every extension in the
-        // list, let's build the corresponding
-        // filename and add to the result
-        for (String extension : extensions) {
-            result.add(command.concat(extension));
-        }
-        
-        // return the resulting list
-        // holding the filenames
-        return result;
-    }
-    
-    /**
-     * Checks if the provided command name is reachable from the system path.
-     * @param command A string representing the command.
-     * @return A logic value.
-     */
-    public static boolean isOnPath(String command) {
-        try {
-            
-            // first and foremost, let's build the list
-            // of filenames based on the underlying
-            // operating system
-            List<String> filenames = appendExtensions(command);
-            
-            // break the path into several parts
-            // based on the path separator symbol
-            StringTokenizer tokenizer = new StringTokenizer(
-                    System.getenv("PATH"),
-                    File.pathSeparator
-            );
-            
-            // iterate through every part of the
-            // path looking for each filename
-            while (tokenizer.hasMoreTokens()) {
-                
-                // if the search does not return an empty
-                // list, one of the filenames got a match,
-                // and the command is available somewhere
-                // in the system path
-                if (
-                        !FileUtils.listFiles(
-                                new File(tokenizer.nextToken()),
-                                new NameFileFilter(filenames),
-                                null
-                        ).isEmpty()) {
-                    
-                    // command is found somewhere,
-                    // so it is on path
-                    return true;
-                }
-            }
-            
-            // nothing was found,
-            // command is not on path
-            return false;
-        }
-        catch (Exception exception) {
-            
-            // an exception was raised, simply
-            // return and forget about it
-            return false;
-        }
-    }
-
-    /**
-     * Gets the full base name of a file.
-     * @param file The file.
-     * @return The corresponding full base name.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static String getFullBasename(File file) throws AraraException {
-        
-        // if the provided file does not contain a
-        // file separator, fallback to the usual
-        // base name lookup
-        if (!file.toString().contains(File.separator)) {
-            return getBasename(file);
-        }
-        else {
-            
-            // we need to get the parent file, get the
-            // canonical path and build the corresponding
-            // full base name path
-            File parent = file.getParentFile();
-            String path = getCanonicalPath(parent == null ? file : parent);
-            return buildPath(path, getBasename(file));
-        }
-    }
-    
-    /**
-     * Checks whether a directory is under a root directory.
-     * @param f1 Directory to be inspected.
-     * @param f2 Root directory.
-     * @return Logical value indicating whether the directoy is under root.
-     * @throws AraraException There was a problem with path retrieval.
-     */
-    public static boolean isSubDirectory(File f1, File f2)
-            throws AraraException {
-        if (f1.isDirectory()) {
-            return getCanonicalPath(f1).
-                    startsWith(
-                            getParentCanonicalPath(f2).concat(File.separator)
-                    );
-        }
-        else {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_ISSUBDIRECTORY_NOT_A_DIRECTORY,
-                            f1.getName()
-                    )
-            );
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/ConfigurationUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/ConfigurationUtils.java
deleted file mode 100644
index 7336110ebe..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/ConfigurationUtils.java
+++ /dev/null
@@ -1,239 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.Arara;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.model.AraraException;
-import com.github.cereda.arara.model.FileType;
-import com.github.cereda.arara.model.FileTypeResource;
-import com.github.cereda.arara.model.Messages;
-import com.github.cereda.arara.model.Resource;
-import java.io.File;
-import java.io.FileReader;
-import java.io.UnsupportedEncodingException;
-import java.net.URLDecoder;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.LinkedHashSet;
-import java.util.List;
-import java.util.Set;
-import org.apache.commons.collections4.CollectionUtils;
-import org.apache.commons.collections4.Predicate;
-import org.apache.commons.lang.SystemUtils;
-import org.yaml.snakeyaml.Yaml;
-import org.yaml.snakeyaml.constructor.Constructor;
-import org.yaml.snakeyaml.error.MarkedYAMLException;
-import org.yaml.snakeyaml.nodes.Tag;
-import org.yaml.snakeyaml.representer.Representer;
-
-/**
- * Implements configuration utilitary methods.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class ConfigurationUtils {
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Gets the list of default file types provided by nightingale, in order.
-     * @return The list of default file types, in order.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static List<FileType> getDefaultFileTypes() throws AraraException {
-        return Arrays.asList(
-                new FileType("tex"),
-                new FileType("dtx"),
-                new FileType("ltx"),
-                new FileType("drv"),
-                new FileType("ins")
-        );
-    }
-
-    /**
-     * Gets the configuration file located at the user home directory, if any.
-     * @return The file reference to the external configuration, if any.
-     */
-    public static File getConfigFile() {
-        List<String> names = Arrays.asList(
-                ".araraconfig.yaml",
-                "araraconfig.yaml",
-                ".arararc.yaml",
-                "arararc.yaml"
-        );
-        
-        // look for configuration files in the user's working directory first
-        for (String name : names) {
-            String path = CommonUtils.buildPath(SystemUtils.USER_DIR, name);
-            File file = new File(path);
-            if (file.exists()) {
-                return file;
-            }
-        }
-        
-        // if no configuration files are found in the user's working directory,
-        // try to look up in a global directory, that is, the user home
-        for (String name : names) {
-            String path = CommonUtils.buildPath(SystemUtils.USER_HOME, name);
-            File file = new File(path);
-            if (file.exists()) {
-                return file;
-            }
-        }
-        return null;
-    }
-
-    /**
-     * Validates the configuration file.
-     * @param file The configuration file.
-     * @return The configuration file as a resource.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Resource validateConfiguration(File file)
-            throws AraraException {
-
-        Representer representer = new Representer();
-        representer.addClassTag(Resource.class, new Tag("!config"));
-        Yaml yaml = new Yaml(new Constructor(Resource.class), representer);
-        try {
-            Resource resource = yaml.loadAs(new FileReader(file),
-                    Resource.class);
-            if (resource.getFiletypes() != null) {
-                List<FileTypeResource> filetypes = resource.getFiletypes();
-                if (CollectionUtils.exists(filetypes,
-                        new Predicate<FileTypeResource>() {
-                    public boolean evaluate(FileTypeResource filetype) {
-                        return (filetype.getExtension() == null);
-                    }
-                })) {
-                    throw new AraraException(
-                            messages.getMessage(
-                                    Messages.ERROR_CONFIGURATION_FILETYPE_MISSING_EXTENSION
-                            )
-                    );
-                }
-            }
-            return resource;
-        } catch (MarkedYAMLException yamlException) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_CONFIGURATION_INVALID_YAML
-                    ),
-                    yamlException
-            );
-        } catch (Exception exception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_CONFIGURATION_GENERIC_ERROR
-                    )
-            );
-        }
-    }
-
-    /**
-     * Normalize a list of rule paths, removing all duplicates.
-     * @param paths The list of rule paths.
-     * @return A list of normalized paths, without duplicates.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static List<String> normalizePaths(List<String> paths)
-            throws AraraException {
-        paths.add(CommonUtils.buildPath(getApplicationPath(), "rules"));
-        Set<String> set = new LinkedHashSet<String>(paths);
-        List<String> result = new ArrayList<String>(set);
-        return result;
-    }
-
-    /**
-     * Normalize a list of file types, removing all duplicates.
-     * @param types The list of file types.
-     * @return A list of normalized file types, without duplicates.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static List<FileType> normalizeFileTypes(List<FileType> types)
-            throws AraraException {
-        types.addAll(getDefaultFileTypes());
-        Set<FileType> set = new LinkedHashSet<FileType>(types);
-        List<FileType> result = new ArrayList<FileType>(set);
-        return result;
-    }
-
-    /**
-     * Gets the canonical absolute application path.
-     * @return The string representation of the canonical absolute application
-     * path.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static String getApplicationPath() throws AraraException {
-        try {
-            String path = Arara.class.getProtectionDomain().
-                    getCodeSource().getLocation().getPath();
-            path = URLDecoder.decode(path, "UTF-8");
-            path = new File(path).getParentFile().getPath();
-            return path;
-        } catch (UnsupportedEncodingException exception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_GETAPPLICATIONPATH_ENCODING_EXCEPTION
-                    ),
-                    exception
-            );
-        }
-    }
-
-    /**
-     * Cleans the file name to avoid invalid entries.
-     * @param name The file name.
-     * @return A cleaned file name.
-     */
-    public static String cleanFileName(String name) {
-        String result = (new File(name)).getName().trim();
-        if (CommonUtils.checkEmptyString(result)) {
-            return "arara";
-        } else {
-            return result.trim();
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/DatabaseUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/DatabaseUtils.java
deleted file mode 100644
index 3a9b4eeea5..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/DatabaseUtils.java
+++ /dev/null
@@ -1,140 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.model.AraraException;
-import com.github.cereda.arara.model.Database;
-import com.github.cereda.arara.model.Messages;
-import java.io.File;
-import org.simpleframework.xml.Serializer;
-import org.simpleframework.xml.core.Persister;
-
-/**
- * Implements database utilitary methods.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class DatabaseUtils {
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Loads the XML file representing the database.
-     * @return The database object.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Database load() throws AraraException {
-        if (!exists()) {
-            return new Database();
-        } else {
-            File file = new File(getPath());
-            try {
-                Serializer serializer = new Persister();
-                Database database = serializer.read(Database.class, file);
-                return database;
-            } catch (Exception exception) {
-                throw new AraraException(
-                        messages.getMessage(
-                                Messages.ERROR_LOAD_COULD_NOT_LOAD_XML,
-                                file.getName()
-                        ),
-                        exception
-                );
-            }
-        }
-    }
-
-    /**
-     * Saves the database on a XML file.
-     * @param database The database object.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static void save(Database database) throws AraraException {
-        File file = new File(getPath());
-        try {
-            Serializer serializer = new Persister();
-            serializer.write(database, file);
-        } catch (Exception exception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_SAVE_COULD_NOT_SAVE_XML,
-                            file.getName()
-                    ),
-                    exception
-            );
-        }
-    }
-
-    /**
-     * Checks if the XML file representing the database exists.
-     * @return A boolean value indicating if the XML file exists.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private static boolean exists() throws AraraException {
-        File file = new File(getPath());
-        return file.exists();
-    }
-
-    /**
-     * Gets the path to the XML file representing the database.
-     * @return A string representing the path to the XML file.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private static String getPath() throws AraraException {
-        String name = ((String) ConfigurationController.
-                getInstance().get("execution.database.name")).concat(".xml");
-        String path = CommonUtils.getParentCanonicalPath(getReference());
-        return CommonUtils.buildPath(path, name);
-    }
-
-    /**
-     * Gets the main file reference.
-     * @return The main file reference.
-     */
-    private static File getReference() {
-        return (File) ConfigurationController.
-                getInstance().get("execution.reference");
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/DirectiveAssembler.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/DirectiveAssembler.java
deleted file mode 100644
index 6f6f676ab5..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/DirectiveAssembler.java
+++ /dev/null
@@ -1,106 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Implements a directive assembler in order to help build a directive from a
- * list of strings.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class DirectiveAssembler {
-
-    // this variable holds a list of
-    // line numbers indicating which
-    // lines composed the resulting
-    // potential directive
-    private final List<Integer> lineNumbers;
-    
-    // this variable holds the textual
-    // representation of the directive
-    private String text;
-
-    /**
-     * Constructor.
-     */
-    public DirectiveAssembler() {
-        lineNumbers = new ArrayList<Integer>();
-        text = "";
-    }
-
-     /**
-     * Checks if an append operation is allowed.
-     * @return A boolean value indicating if an append operation is allowed.
-     */
-    public boolean isAppendAllowed() {
-        return !lineNumbers.isEmpty();
-    }
-
-    /**
-     * Adds a line number to the assembler.
-     * @param line An integer representing the line number.
-     */
-    public void addLineNumber(int line) {
-        lineNumbers.add(line);
-    }
-
-    /**
-     * Appends the provided line to the assembler text.
-     * @param line The provided line.
-     */
-    public void appendLine(String line) {
-        text = text.concat(" ").concat(line.trim());
-    }
-
-    /**
-     * Gets the list of line numbers.
-     * @return The list of line numbers.
-     */
-    public List<Integer> getLineNumbers() {
-        return lineNumbers;
-    }
-
-    /**
-     * Gets the text.
-     * @return The assembler text, properly trimmed.
-     */
-    public String getText() {
-        return text.trim();
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/DirectiveResolver.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/DirectiveResolver.java
deleted file mode 100644
index b0a1af850b..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/DirectiveResolver.java
+++ /dev/null
@@ -1,59 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import org.yaml.snakeyaml.nodes.Tag;
-import org.yaml.snakeyaml.resolver.Resolver;
-
-/**
- * This class implements a directive resolver.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class DirectiveResolver extends Resolver {
-
-    /**
-     * Adds implicit resolvers to the YAML model. For arara, I disabled
-     * boolean and numeric values to be automatically parsed. They still can
-     * be used through an explicit conversion in the rule context.
-     */
-    @Override
-    protected void addImplicitResolvers() {
-        addImplicitResolver(Tag.MERGE, MERGE, "<");
-        addImplicitResolver(Tag.NULL, NULL, "~nN\0");
-        addImplicitResolver(Tag.NULL, EMPTY, null);
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/DirectiveUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/DirectiveUtils.java
deleted file mode 100644
index 6ea0404f72..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/DirectiveUtils.java
+++ /dev/null
@@ -1,438 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.model.AraraException;
-import com.github.cereda.arara.model.Conditional;
-import com.github.cereda.arara.model.Directive;
-import com.github.cereda.arara.model.Messages;
-import com.github.cereda.arara.model.Pair;
-import java.io.File;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.yaml.snakeyaml.DumperOptions;
-import org.yaml.snakeyaml.Yaml;
-import org.yaml.snakeyaml.constructor.Constructor;
-import org.yaml.snakeyaml.error.MarkedYAMLException;
-import org.yaml.snakeyaml.representer.Representer;
-
-/**
- * Implements directive utilitary methods.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class DirectiveUtils {
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-    
-    // get the logger context from a factory
-    private static final Logger logger =
-            LoggerFactory.getLogger(DirectiveUtils.class);
-
-    /**
-     * Extracts a list of directives from a list of strings.
-     * @param lines List of strings.
-     * @return A list of directives.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */    
-    public static List<Directive> extractDirectives(List<String> lines)
-            throws AraraException {
-
-        boolean header = (Boolean) ConfigurationController.
-                getInstance().get("execution.header");
-        String regex = (String) ConfigurationController.
-                getInstance().get("execution.file.pattern");
-        Pattern linecheck = Pattern.compile(regex);
-        regex = regex.concat((String) ConfigurationController.
-                getInstance().get("application.pattern"));
-        Pattern pattern = Pattern.compile(regex);
-        List<Pair<Integer, String>> pairs =
-                new ArrayList<Pair<Integer, String>>();
-        Matcher matcher;
-        for (int i = 0; i < lines.size(); i++) {
-            matcher = pattern.matcher(lines.get(i));
-            if (matcher.find()) {
-                String line = lines.get(i).substring(
-                        matcher.end(),
-                        lines.get(i).length()
-                );
-                Pair<Integer, String> pair =
-                        new Pair<Integer, String>(i + 1, line);
-                pairs.add(pair);
-
-                logger.info(
-                        messages.getMessage(
-                                Messages.LOG_INFO_POTENTIAL_PATTERN_FOUND,
-                                (i + 1),
-                                line.trim()
-                        )
-                );
-            }
-            else {
-                if (header) {
-                    if (!checkLinePattern(linecheck, lines.get(i))) {
-                        break;
-                    }
-                }
-            }
-        }
-
-        if (pairs.isEmpty()) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_VALIDATE_NO_DIRECTIVES_FOUND
-                    )
-            );
-        }
-
-        List<DirectiveAssembler> assemblers
-                = new ArrayList<DirectiveAssembler>();
-        DirectiveAssembler assembler = new DirectiveAssembler();
-        regex = (String) ConfigurationController.getInstance().
-                get("directives.linebreak.pattern");
-        pattern = Pattern.compile(regex);
-        for (Pair<Integer, String> pair : pairs) {
-            matcher = pattern.matcher(pair.getSecondElement());
-            if (matcher.find()) {
-                if (!assembler.isAppendAllowed()) {
-                    throw new AraraException(
-                            messages.getMessage(
-                                    Messages.ERROR_VALIDATE_ORPHAN_LINEBREAK,
-                                    pair.getFirstElement()
-                            )
-                    );
-                } else {
-                    assembler.addLineNumber(pair.getFirstElement());
-                    assembler.appendLine(matcher.group(1));
-                }
-            } else {
-                if (assembler.isAppendAllowed()) {
-                    assemblers.add(assembler);
-                }
-                assembler = new DirectiveAssembler();
-                assembler.addLineNumber(pair.getFirstElement());
-                assembler.appendLine(pair.getSecondElement());
-            }
-        }
-        if (assembler.isAppendAllowed()) {
-            assemblers.add(assembler);
-        }
-
-        List<Directive> directives = new ArrayList<Directive>();
-        for (DirectiveAssembler current : assemblers) {
-            directives.add(generateDirective(current));
-        }
-        return directives;
-
-    }
-
-    /**
-     * Generates a directive from a directive assembler.
-     * @param assembler The directive assembler.
-     * @return The corresponding directive.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Directive generateDirective(DirectiveAssembler assembler)
-            throws AraraException {
-        String regex = (String) ConfigurationController.getInstance().
-                get("directives.pattern");
-        Pattern pattern = Pattern.compile(regex);
-        Matcher matcher = pattern.matcher(assembler.getText());
-        if (matcher.find()) {
-            Directive directive = new Directive();
-            directive.setIdentifier(matcher.group(1));
-            directive.setParameters(
-                    getParameters(matcher.group(3), assembler.getLineNumbers())
-            );
-            Conditional conditional = new Conditional();
-            conditional.setType(getType(matcher.group(5)));
-            conditional.setCondition(getCondition(matcher.group(6)));
-            directive.setConditional(conditional);
-            directive.setLineNumbers(assembler.getLineNumbers());
-
-            logger.info(
-                    messages.getMessage(
-                            Messages.LOG_INFO_POTENTIAL_DIRECTIVE_FOUND,
-                            directive
-                    )
-            );
-
-            return directive;
-        } else {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_VALIDATE_INVALID_DIRECTIVE_FORMAT,
-                            CommonUtils.getCollectionElements(
-                                    assembler.getLineNumbers(),
-                                    "(",
-                                    ")",
-                                    ", "
-                            )
-                    )
-            );
-        }
-    }
-
-    /**
-     * Gets the conditional type based on the input string.
-     * @param text The input string.
-     * @return The conditional type.
-     */
-    private static Conditional.ConditionalType getType(String text) {
-        if (text == null) {
-            return Conditional.ConditionalType.NONE;
-        } else {
-            if (text.equals("if")) {
-                return Conditional.ConditionalType.IF;
-            } else {
-                if (text.equals("while")) {
-                    return Conditional.ConditionalType.WHILE;
-                } else {
-                    if (text.equals("until")) {
-                        return Conditional.ConditionalType.UNTIL;
-                    } else {
-                        return Conditional.ConditionalType.UNLESS;
-                    }
-                }
-            }
-        }
-    }
-
-    /**
-     * Gets the condition from the input string.
-     * @param text The input string.
-     * @return A string representing the condition.
-     */
-    private static String getCondition(String text) {
-        return text == null ? "" : text;
-    }
-
-    /**
-     * Gets the parameters from the input string.
-     * @param text The input string.
-     * @param numbers The list of line numbers.
-     * @return A map containing the directive parameters.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private static Map<String, Object> getParameters(String text,
-            List<Integer> numbers) throws AraraException {
-
-        if (text == null) {
-            return new HashMap<String, Object>();
-        }
-
-        Yaml yaml = new Yaml(
-                new Constructor(),
-                new Representer(),
-                new DumperOptions(),
-                new DirectiveResolver()
-        );
-        try {
-            @SuppressWarnings("unchecked")
-            HashMap<String, Object> map = yaml.loadAs(text, HashMap.class);
-            return map;
-        } catch (MarkedYAMLException exception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_VALIDATE_YAML_EXCEPTION,
-                            CommonUtils.getCollectionElements(
-                                    numbers,
-                                    "(",
-                                    ")",
-                                    ", "
-                            )
-                    ),
-                    exception
-            );
-        }
-    }
-
-    /**
-     * Validates the list of directives, returning a new list.
-     * @param directives The list of directives.
-     * @return A new list of directives.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static List<Directive> validate(List<Directive> directives)
-            throws AraraException {
-
-        ArrayList<Directive> result = new ArrayList<Directive>();
-        for (Directive directive : directives) {
-            Map<String, Object> parameters = directive.getParameters();
-
-            if (parameters.containsKey("file")) {
-                throw new AraraException(
-                        messages.getMessage(
-                                Messages.ERROR_VALIDATE_FILE_IS_RESERVED,
-                                CommonUtils.getCollectionElements(
-                                        directive.getLineNumbers(),
-                                        "(",
-                                        ")",
-                                        ", "
-                                )
-                        )
-                );
-            }
-
-            if (parameters.containsKey("reference")) {
-                throw new AraraException(
-                        messages.getMessage(
-                                Messages.ERROR_VALIDATE_REFERENCE_IS_RESERVED,
-                                CommonUtils.getCollectionElements(
-                                        directive.getLineNumbers(),
-                                        "(",
-                                        ")",
-                                        ", "
-                                )
-                        )
-                );
-            }
-
-            if (parameters.containsKey("files")) {
-
-                Object holder = parameters.get("files");
-                if (holder instanceof List) {
-                    @SuppressWarnings("unchecked")
-                    List<Object> files = (List<Object>) holder;
-                    parameters.remove("files");
-                    if (files.isEmpty()) {
-                        throw new AraraException(
-                                messages.getMessage(
-                                        Messages.ERROR_VALIDATE_EMPTY_FILES_LIST,
-                                        CommonUtils.getCollectionElements(
-                                                directive.getLineNumbers(),
-                                                "(",
-                                                ")",
-                                                ", "
-                                        )
-                                )
-                        );
-                    }
-                    for (Object file : files) {
-                        Map<String, Object> map = new HashMap<String, Object>();
-                        for (String key : parameters.keySet()) {
-                            map.put(key, parameters.get(key));
-                        }
-                        File representation = CommonUtils.
-                                getCanonicalFile(String.valueOf(file));
-
-                        map.put("reference", representation);
-                        map.put("file", representation.getName());
-
-                        Directive addition = new Directive();
-                        Conditional conditional = new Conditional();
-                        conditional.setCondition(directive.getConditional().
-                                getCondition()
-                        );
-                        conditional.setType(directive.getConditional().
-                                getType()
-                        );
-                        addition.setIdentifier(directive.getIdentifier());
-                        addition.setConditional(conditional);
-                        addition.setParameters(map);
-                        addition.setLineNumbers(directive.getLineNumbers());
-                        result.add(addition);
-                    }
-                } else {
-                    throw new AraraException(
-                            messages.getMessage(
-                                    Messages.ERROR_VALIDATE_FILES_IS_NOT_A_LIST,
-                                    CommonUtils.getCollectionElements(
-                                            directive.getLineNumbers(),
-                                            "(",
-                                            ")",
-                                            ", "
-                                    )
-                            )
-                    );
-                }
-            } else {
-                File representation = (File) ConfigurationController.
-                        getInstance().get("execution.reference");
-                parameters.put("file", representation.getName());
-                parameters.put("reference", representation);
-                directive.setParameters(parameters);
-                result.add(directive);
-            }
-        }
-
-        logger.info(
-                messages.getMessage(
-                        Messages.LOG_INFO_VALIDATED_DIRECTIVES
-                )
-        );
-        logger.info(DisplayUtils.displayOutputSeparator(
-                messages.getMessage(
-                        Messages.LOG_INFO_DIRECTIVES_BLOCK
-                )
-        ));
-        for (Directive directive : result) {
-            logger.info(directive.toString());
-        }
-
-        logger.info(DisplayUtils.displaySeparator());
-
-        return result;
-    }
-    
-    /**
-     * Checks if the provided line contains the corresponding pattern, based on
-     * the file type, or an empty line.
-     * @param pattern Pattern to be matched, based on the file type.
-     * @param line Provided line.
-     * @return Logical value indicating if the provided line contains the
-     * corresponding pattern, based on the file type, or an empty line.
-     */
-    private static boolean checkLinePattern(Pattern pattern, String line) {
-        return CommonUtils.checkEmptyString(line.trim()) ||
-                pattern.matcher(line).find();
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/DisplayUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/DisplayUtils.java
deleted file mode 100644
index 75cda6f99a..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/DisplayUtils.java
+++ /dev/null
@@ -1,502 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.model.AraraException;
-import com.github.cereda.arara.model.Conditional;
-import com.github.cereda.arara.model.Messages;
-import com.github.cereda.arara.model.StopWatch;
-import java.io.File;
-import java.util.List;
-import org.apache.commons.lang.StringUtils;
-import org.apache.commons.lang.WordUtils;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * Implements display utilitary methods.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class DisplayUtils {
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    // get the logger context from a factory
-    private static final Logger logger =
-            LoggerFactory.getLogger(DisplayUtils.class);
-
-    /**
-     * Displays the short version of the current entry in the terminal.
-     * @param name Rule name.
-     * @param task Task name.
-     */
-    private static void buildShortEntry(String name, String task) {
-        int width = getWidth();
-        int result = getLongestMatch();
-        if (result >= width) {
-            result = 10;
-        }
-        int space = width - result - 1;
-        StringBuilder entry = new StringBuilder();
-        entry.append("(").append(name).append(") ");
-        entry.append(task).append(" ");
-        String line = StringUtils.abbreviate(entry.toString(), space - 4);
-        entry = new StringBuilder();
-        entry.append(StringUtils.rightPad(line, space, ".")).append(" ");
-        System.out.print(entry);
-    }
-
-    /**
-     * Displays the short version of the current entry result in the terminal.
-     * @param value The boolean value to be displayed.
-     */
-    private static void buildShortResult(boolean value) {
-        int result = getLongestMatch();
-        System.out.println(StringUtils.leftPad(getResult(value), result));
-    }
-
-    /**
-     * Displays the current entry result in the terminal.
-     * @param value The boolean value to be displayed.
-     */
-    public static void printEntryResult(boolean value) {
-        ConfigurationController.getInstance().put("display.line", false);
-        ConfigurationController.getInstance().put("display.result", true);
-        ConfigurationController.getInstance()
-                .put("execution.status", value ? 0 : 1);
-        logger.info(
-                messages.getMessage(
-                        Messages.LOG_INFO_TASK_RESULT
-                ).concat(" ").concat(getResult(value))
-        );
-        if (!isDryRunMode()) {
-            if (!isVerboseMode()) {
-                buildShortResult(value);
-            } else {
-                buildLongResult(value);
-            }
-        }
-    }
-
-    /**
-     * Displays a long version of the current entry result in the terminal.
-     * @param value The boolean value to be displayed
-     */
-    private static void buildLongResult(boolean value) {
-        int width = getWidth();
-        System.out.println("\n".concat(StringUtils.leftPad(
-                " ".concat(getResult(value)), width, "-"
-        )));
-    }
-
-    /**
-     * Displays the current entry in the terminal.
-     * @param name The rule name.
-     * @param task The task name.
-     */
-    public static void printEntry(String name, String task) {
-        logger.info(
-                messages.getMessage(
-                        Messages.LOG_INFO_INTERPRET_TASK,
-                        task,
-                        name
-                )
-        );
-        ConfigurationController.getInstance().put("display.line", true);
-        ConfigurationController.getInstance().put("display.result", false);
-        if (!isDryRunMode()) {
-            if (!isVerboseMode()) {
-                buildShortEntry(name, task);
-            } else {
-                buildLongEntry(name, task);
-            }
-        } else {
-            buildDryRunEntry(name, task);
-        }
-    }
-
-    /**
-     * Gets the length of the longest result match.
-     * @return An integer value representing the longest result match.
-     */
-    private static int getLongestMatch() {
-        String[] values = new String[]{
-            messages.getMessage(Messages.INFO_LABEL_ON_SUCCESS),
-            messages.getMessage(Messages.INFO_LABEL_ON_FAILURE),
-            messages.getMessage(Messages.INFO_LABEL_ON_ERROR)
-        };
-        int max = values[0].length();
-        for (String value : values) {
-            if (max < value.length()) {
-                max = value.length();
-            }
-        }
-        return max;
-    }
-
-    /**
-     * Displays a long version of the current entry in the terminal.
-     * @param name Rule name.
-     * @param task Task name.
-     */
-    private static void buildLongEntry(String name, String task) {
-        if (ConfigurationController.getInstance().contains("display.rolling")) {
-            addNewLine();
-        } else {
-            ConfigurationController.getInstance().put("display.rolling", true);
-        }
-        StringBuilder line = new StringBuilder();
-        line.append("(").append(name).append(") ");
-        line.append(task);
-        System.out.println(displaySeparator());
-        System.out.println(StringUtils.abbreviate(line.toString(), getWidth()));
-        System.out.println(displaySeparator());
-    }
-
-    /**
-     * Displays a dry-run version of the current entry in the terminal.
-     * @param name The rule name.
-     * @param task The task name.
-     */
-    private static void buildDryRunEntry(String name, String task) {
-        if (ConfigurationController.getInstance().contains("display.rolling")) {
-            addNewLine();
-        } else {
-            ConfigurationController.getInstance().put("display.rolling", true);
-        }
-        StringBuilder line = new StringBuilder();
-        line.append("[DR] (").append(name).append(") ");
-        line.append(task);
-        System.out.println(StringUtils.abbreviate(line.toString(), getWidth()));
-        System.out.println(displaySeparator());
-    }
-
-    /**
-     * Displays the exception in the terminal.
-     * @param exception The exception object.
-     */
-    public static void printException(AraraException exception) {
-        ConfigurationController.getInstance().put("display.exception", true);
-        ConfigurationController.getInstance().put("execution.status", 2);
-        boolean display = false;
-        if (ConfigurationController.getInstance().contains("display.line")) {
-            display = (Boolean) ConfigurationController.
-                    getInstance().get("display.line");
-        }
-        if (ConfigurationController.getInstance().contains("display.result")) {
-            if (((Boolean) ConfigurationController.
-                    getInstance().get("display.result")) == true) {
-                addNewLine();
-            }
-        }
-        if (display) {
-            if (!isDryRunMode()) {
-                if (!isVerboseMode()) {
-                    buildShortError();
-                } else {
-                    buildLongError();
-                }
-                addNewLine();
-            }
-        }
-        String text = exception.hasException() ?
-                exception.getMessage().concat(" ").concat(
-                        messages.getMessage(
-                                Messages.INFO_DISPLAY_EXCEPTION_MORE_DETAILS
-                        )
-                )
-                : exception.getMessage();
-        logger.error(text);
-        wrapText(text);
-        if (exception.hasException()) {
-            addNewLine();
-            displayDetailsLine();
-            String details = exception.getException().getMessage();
-            logger.error(details);
-            wrapText(details);
-        }
-    }
-
-    /**
-     * Gets the string representation of the provided boolean value.
-     * @param value The boolean value.
-     * @return The string representation.
-     */
-    private static String getResult(boolean value) {
-        return (value == true ?
-                messages.getMessage(
-                        Messages.INFO_LABEL_ON_SUCCESS
-                )
-                : messages.getMessage(Messages.INFO_LABEL_ON_FAILURE));
-    }
-
-    /**
-     * Displays the short version of an error in the terminal.
-     */
-    private static void buildShortError() {
-        int result = getLongestMatch();
-        System.out.println(StringUtils.leftPad(
-                messages.getMessage(
-                        Messages.INFO_LABEL_ON_ERROR
-                ),
-                result
-        ));
-    }
-
-    /**
-     * Displays the long version of an error in the terminal.
-     */
-    private static void buildLongError() {
-        String line = StringUtils.leftPad(
-                " ".concat(messages.getMessage(Messages.INFO_LABEL_ON_ERROR)),
-                getWidth(), "-");
-        System.out.println(line);
-    }
-
-    /**
-     * Gets the default terminal width defined in the settings.
-     * @return An integer representing the terminal width.
-     */
-    private static int getWidth() {
-        return (Integer) ConfigurationController.
-                getInstance().get("application.width");
-    }
-
-    /**
-     * Displays the provided text wrapped nicely according to the default
-     * terminal width.
-     * @param text The text to be displayed.
-     */
-    public static void wrapText(String text) {
-        System.out.println(WordUtils.wrap(text, getWidth()));
-    }
-
-    /**
-     * Checks if the execution is in dry-run mode.
-     * @return A boolean value indicating if the execution is in dry-run mode.
-     */
-    private static boolean isDryRunMode() {
-        return (Boolean) ConfigurationController.
-                getInstance().get("execution.dryrun");
-    }
-
-    /**
-     * Checks if the execution is in verbose mode.
-     * @return A boolean value indicating if the execution is in verbose mode.
-     */
-    private static boolean isVerboseMode() {
-        return (Boolean) ConfigurationController.
-                getInstance().get("execution.verbose");
-    }
-
-    /**
-     * Displays the rule authors in the terminal.
-     * @param authors The list of authors.
-     */
-    public static void printAuthors(List<String> authors) {
-        StringBuilder line = new StringBuilder();
-        line.append(authors.size() == 1 ?
-                messages.getMessage(Messages.INFO_LABEL_AUTHOR)
-                : messages.getMessage(Messages.INFO_LABEL_AUTHORS));
-        String text = authors.isEmpty() ?
-                messages.getMessage(Messages.INFO_LABEL_NO_AUTHORS)
-                : CommonUtils.getCollectionElements(
-                        CommonUtils.trimSpaces(authors), "", "", ", ");
-        line.append(" ").append(text);
-        wrapText(line.toString());
-    }
-
-    /**
-     * Displays the current conditional in the terminal.
-     * @param conditional The conditional object.
-     */
-    public static void printConditional(Conditional conditional) {
-        if (conditional.getType() != Conditional.ConditionalType.NONE) {
-            StringBuilder line = new StringBuilder();
-            line.append(messages.getMessage(Messages.INFO_LABEL_CONDITIONAL));
-            line.append(" (");
-            line.append(String.valueOf(conditional.getType()));
-            line.append(") ").append(conditional.getCondition());
-            wrapText(line.toString());
-        }
-    }
-
-    /**
-     * Displays the file information in the terminal.
-     */
-    public static void printFileInformation() {
-        File file = (File) ConfigurationController.
-                getInstance().get("execution.reference");
-        String version = (String) ConfigurationController.
-                getInstance().get("application.version");
-        String revision = (String) ConfigurationController.
-                getInstance().get("application.revision");
-        String line = messages.getMessage(
-                Messages.INFO_DISPLAY_FILE_INFORMATION,
-                file.getName(),
-                CommonUtils.calculateFileSize(file),
-                CommonUtils.getLastModifiedInformation(file)
-        );
-        logger.info(messages.getMessage(
-                Messages.LOG_INFO_WELCOME_MESSAGE,
-                version,
-                revision
-        ));
-        logger.info(displaySeparator());
-        logger.info(String.format("::: arara @ %s",
-                getApplicationPath()
-        ));
-        logger.info(String.format("::: Java %s, %s",
-                CommonUtils.getSystemProperty("java.version",
-                        "[unknown version]"),
-                CommonUtils.getSystemProperty("java.vendor",
-                        "[unknown vendor]")
-        ));
-        logger.info(String.format("::: %s",
-                CommonUtils.getSystemProperty("java.home",
-                        "[unknown location]")
-        ));
-        logger.info(String.format("::: %s, %s, %s",
-                CommonUtils.getSystemProperty("os.name",
-                        "[unknown OS name]"),
-                CommonUtils.getSystemProperty("os.arch",
-                        "[unknown OS arch]"),
-                CommonUtils.getSystemProperty("os.version",
-                        "[unknown OS version]")
-        ));
-        logger.info(String.format("::: user.home @ %s",
-                CommonUtils.getSystemProperty("user.home",
-                        "[unknown user's home directory]")
-        ));
-        logger.info(String.format("::: user.dir @ %s",
-                CommonUtils.getSystemProperty("user.dir",
-                        "[unknown user's working directory]")
-        ));
-        logger.info(String.format("::: CF @ %s",
-                (String) ConfigurationController.
-                        getInstance().get("execution.configuration.name")
-        ));
-        logger.info(displaySeparator());
-        logger.info(line);
-        wrapText(line);
-        addNewLine();
-    }
-
-    /**
-     * Displays the elapsed time in the terminal.
-     */
-    public static void printTime() {
-        if (ConfigurationController.getInstance().contains("display.time")) {
-            if ((ConfigurationController.getInstance().contains("display.line"))
-                    || (ConfigurationController.getInstance().
-                            contains("display.exception"))) {
-                addNewLine();
-            }
-            String text = messages.getMessage(
-                    Messages.INFO_DISPLAY_EXECUTION_TIME, StopWatch.getTime());
-            logger.info(text);
-            wrapText(text);
-        }
-    }
-
-    /**
-     * Displays the application logo in the terminal.
-     */
-    public static void printLogo() {
-        StringBuilder builder = new StringBuilder();
-        builder.append("  __ _ _ __ __ _ _ __ __ _ ").append("\n");
-        builder.append(" / _` | '__/ _` | '__/ _` |").append("\n");
-        builder.append("| (_| | | | (_| | | | (_| |").append("\n");
-        builder.append(" \\__,_|_|  \\__,_|_|  \\__,_|");
-        System.out.println(builder.toString());
-        addNewLine();
-    }
-
-    /**
-     * Adds a new line in the terminal.
-     */
-    private static void addNewLine() {
-        System.out.println();
-    }
-
-    /**
-     * Displays a line containing details.
-     */
-    private static void displayDetailsLine() {
-        String line = messages.getMessage(
-                Messages.INFO_LABEL_ON_DETAILS).concat(" ");
-        line = StringUtils.rightPad(
-                StringUtils.abbreviate(line, getWidth()), getWidth(), "-");
-        System.out.println(line);
-    }
-
-    /**
-     * Gets the output separator with the provided text.
-     * @param message The provided text.
-     * @return A string containing the output separator with the provided text.
-     */
-    public static String displayOutputSeparator(String message) {
-        return StringUtils.center(" ".concat(message).concat(" "),
-                getWidth(), "-");
-    }
-
-     /**
-     * Gets the line separator.
-     * @return A string containing the line separator.
-     */
-    public static String displaySeparator() {
-        return StringUtils.repeat("-", getWidth());
-    }
-    
-    /**
-     * Gets the application path.
-     * @return A string containing the application path.
-     */
-    private static String getApplicationPath() {
-        try {
-            return ConfigurationUtils.getApplicationPath();
-        }
-        catch (AraraException ae) {
-            return "[unknown application path]";
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/FileHandlingUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/FileHandlingUtils.java
deleted file mode 100644
index fdd1ab36c6..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/FileHandlingUtils.java
+++ /dev/null
@@ -1,124 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-import org.apache.commons.io.FileUtils;
-
-/**
- * Implements file handling utilitary methods.
- *
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class FileHandlingUtils {
-
-    /**
-     * Writes the string to a file, using UTF-8 as default encoding.
-     * @param file The file.
-     * @param text The string to be written.
-     * @param append A flag whether to append the content.
-     * @return A logical value indicating whether it was successful.
-     */
-    public static boolean writeToFile(File file, String text, boolean append) {
-        try {
-
-            // try to write the provided
-            // string to the file, with
-            // UTF-8 as encoding
-            FileUtils.writeStringToFile(file, text, "UTF-8", append);
-            return true;
-
-        } catch (IOException nothandled) {
-
-            // if something bad happens,
-            // gracefully fallback to
-            // reporting the failure
-            return false;
-        }
-    }
-
-    /**
-     * Writes the string list to a file, using UTF-8 as default encoding.
-     * @param file The file.
-     * @param lines The string list to be written.
-     * @param append A flag whether to append the content.
-     * @return A logical value indicating whether it was successful.
-     */
-    public static boolean writeToFile(File file, List<String> lines,
-            boolean append) {
-        try {
-
-            // try to write the provided
-            // string lists to the file,
-            // with UTF-8 as encoding
-            FileUtils.writeLines(file, "UTF-8", lines, append);
-            return true;
-
-        } catch (IOException nothandled) {
-
-            // if something bad happens,
-            // gracefully fallback to
-            // reporting the failure
-            return false;
-        }
-    }
-
-    /**
-     * Reads the provided file into a list of strings.
-     * @param file The file.
-     * @return A list of strings.
-     */
-    public static List<String> readFromFile(File file) {
-        try {
-
-            // returns the contents of
-            // the provided file as
-            // a list of strings
-            return FileUtils.readLines(file, "UTF-8");
-
-        } catch (IOException nothandled) {
-
-            // if something bad happens,
-            // gracefully fallback to
-            // an empty file list
-            return new ArrayList<String>();
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/FileSearchingUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/FileSearchingUtils.java
deleted file mode 100644
index 9f0c03c143..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/FileSearchingUtils.java
+++ /dev/null
@@ -1,117 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import java.io.File;
-import java.util.ArrayList;
-import java.util.List;
-import org.apache.commons.io.FileUtils;
-import org.apache.commons.io.filefilter.FalseFileFilter;
-import org.apache.commons.io.filefilter.TrueFileFilter;
-import org.apache.commons.io.filefilter.WildcardFileFilter;
-
-/**
- * Implements file searching utilitary methods.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class FileSearchingUtils {
-
-    /**
-     * List all files from the provided directory according to the list of
-     * extensions. The leading dot must be omitted, unless it is part of the
-     * extension.
-     * @param directory The provided directory.
-     * @param extensions The list of extensions.
-     * @param recursive A flag indicating whether the search is recursive.
-     * @return A list of files.
-     */
-    public static List<File> listFilesByExtensions(File directory,
-            List<String> extensions, boolean recursive) {
-        try {
-
-            // convert the provided extension
-            // list to an extension array
-            String[] array = new String[extensions.size()];
-            array = extensions.toArray(array);
-
-            // return the result of the
-            // provided search
-            return new ArrayList<File>(
-                    FileUtils.listFiles(directory, array, recursive)
-            );
-        } catch (Exception nothandled) {
-
-            // if something bad happens,
-            // gracefully fallback to
-            // an empty file list
-            return new ArrayList<File>();
-        }
-    }
-
-    /**
-     * List all files from the provided directory matching the list of file
-     * name patterns. Such list can contain wildcards.
-     * @param directory The provided directory.
-     * @param patterns The list of file name patterns.
-     * @param recursive A flag indicating whether the search is recursive.
-     * @return A list of files.
-     */
-    public static List<File> listFilesByPatterns(File directory,
-            List<String> patterns, boolean recursive) {
-        try {
-
-            // return the result of the provided
-            // search, with the wildcard filter
-            // and a potential recursive search
-            return new ArrayList<File>(
-                    FileUtils.listFiles(
-                            directory,
-                            new WildcardFileFilter(patterns),
-                            recursive
-                                    ? TrueFileFilter.INSTANCE
-                                    : FalseFileFilter.INSTANCE
-                    )
-            );
-        } catch (Exception nothandled) {
-
-            // if something bad happens,
-            // gracefully fallback to
-            // an empty file list
-            return new ArrayList<File>();
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/InterpreterUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/InterpreterUtils.java
deleted file mode 100644
index d60de0884b..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/InterpreterUtils.java
+++ /dev/null
@@ -1,257 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.model.AraraException;
-import com.github.cereda.arara.model.Argument;
-import com.github.cereda.arara.model.Command;
-import com.github.cereda.arara.model.Conditional;
-import com.github.cereda.arara.model.Messages;
-import com.github.cereda.arara.model.Rule;
-import java.io.ByteArrayOutputStream;
-import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.List;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.TimeoutException;
-import org.apache.commons.collections4.CollectionUtils;
-import org.apache.commons.collections4.Transformer;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.zeroturnaround.exec.InvalidExitValueException;
-import org.zeroturnaround.exec.ProcessExecutor;
-import org.zeroturnaround.exec.listener.ShutdownHookProcessDestroyer;
-
-/**
- * Implements interpreter utilitary methods.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class InterpreterUtils {
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-    
-    // get the logger context from a factory
-    private static final Logger logger =
-            LoggerFactory.getLogger(InterpreterUtils.class);
-
-    /**
-     * Gets a list of all rule arguments.
-     * @param rule The provided rule.
-     * @return A list of strings containing all rule arguments.
-     */
-    public static List<String> getRuleArguments(Rule rule) {
-        Collection<String> result = CollectionUtils.collect(
-                rule.getArguments(), new Transformer<Argument, String>() {
-            public String transform(Argument input) {
-                return input.getIdentifier();
-            }
-        });
-        return new ArrayList<String>(result);
-    }
-
-    /**
-     * Checks if the current conditional has a prior evaluation.
-     * @param conditional The current conditional object.
-     * @return A boolean value indicating if the current conditional has a prior
-     * evaluation.
-     */
-    public static boolean runPriorEvaluation(Conditional conditional) {
-        if (((Boolean) ConfigurationController.getInstance().
-                get("execution.dryrun")) == true) {
-            return false;
-        }
-        switch (conditional.getType()) {
-            case IF:
-            case WHILE:
-            case UNLESS:
-                return true;
-            default:
-                return false;
-        }
-    }
-
-    /**
-     * Runs the command in the underlying operating system.
-     * @param command An object representing the command.
-     * @return An integer value representing the exit code.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static int run(Object command) throws AraraException {
-        boolean verbose = (Boolean) ConfigurationController.
-                getInstance().get("execution.verbose");
-        boolean timeout = (Boolean) ConfigurationController.
-                getInstance().get("execution.timeout");
-        long value = (Long) ConfigurationController.
-                getInstance().get("execution.timeout.value");
-        TimeUnit unit = (TimeUnit) ConfigurationController.
-                getInstance().get("execution.timeout.unit");
-        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
-        ProcessExecutor executor = new ProcessExecutor();
-        if (CommonUtils.checkClass(Command.class, command)) {
-            executor = executor.command(((Command) command).getElements());
-            if (((Command) command).hasWorkingDirectory()) {
-                executor = executor.directory(
-                        ((Command) command).getWorkingDirectory()
-                );
-            }
-        } else {
-            executor = executor.commandSplit((String) command);
-        }
-        if (timeout) {
-            if (value == 0) {
-                throw new AraraException(
-                        messages.getMessage(
-                                Messages.ERROR_RUN_TIMEOUT_INVALID_RANGE
-                        )
-                );
-            }
-            executor = executor.timeout(value, unit);
-        }
-        TeeOutputStream tee;
-        if (verbose) {
-            tee = new TeeOutputStream(System.out, buffer);
-            executor = executor.redirectInput(System.in);
-        } else {
-            tee = new TeeOutputStream(buffer);
-        }
-        executor = executor.redirectOutput(tee).redirectError(tee);
-        ShutdownHookProcessDestroyer hook = new ShutdownHookProcessDestroyer();
-        executor = executor.addDestroyer(hook);
-        try {
-            int exit = executor.execute().getExitValue();
-            logger.info(DisplayUtils.displayOutputSeparator(
-                    messages.getMessage(
-                            Messages.LOG_INFO_BEGIN_BUFFER
-                    )
-            ));
-            logger.info(buffer.toString());
-            logger.info(DisplayUtils.displayOutputSeparator(
-                    messages.getMessage(
-                            Messages.LOG_INFO_END_BUFFER
-                    )
-            ));
-            return exit;
-        } catch (IOException ioexception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_RUN_IO_EXCEPTION
-                    ),
-                    ioexception
-            );
-        } catch (InterruptedException iexception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_RUN_INTERRUPTED_EXCEPTION
-                    ),
-                    iexception
-            );
-        } catch (InvalidExitValueException ievexception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_RUN_INVALID_EXIT_VALUE_EXCEPTION
-                    ),
-                    ievexception
-            );
-        } catch (TimeoutException texception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_RUN_TIMEOUT_EXCEPTION
-                    ),
-                    texception
-            );
-        } catch (Exception exception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_RUN_GENERIC_EXCEPTION
-                    ),
-                    exception
-            );
-        }
-    }
-
-    /**
-     * Builds the rule path based on the rule name and returns the corresponding
-     * file location.
-     * @param name The rule name.
-     * @return The rule file.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static File buildRulePath(String name) throws AraraException {
-        @SuppressWarnings("unchecked")
-        List<String> paths = (List<String>) ConfigurationController.
-                getInstance().get("execution.rule.paths");
-        for (String path : paths) {
-            File location = new File(construct(path, name));
-            if (location.exists()) {
-                return location;
-            }
-        }
-        return null;
-    }
-
-    /**
-     * Constructs the path given the current path and the rule name.
-     * @param path The current path.
-     * @param name The rule name.
-     * @return The constructed path.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static String construct(String path, String name)
-            throws AraraException {
-        name = name.concat(".yaml");
-        File location = new File(path);
-        if (location.isAbsolute()) {
-            return CommonUtils.buildPath(path, name);
-        } else {
-            File reference = (File) ConfigurationController.
-                    getInstance().get("execution.reference");
-            String parent = CommonUtils.buildPath(
-                    CommonUtils.getParentCanonicalPath(reference), path);
-            return CommonUtils.buildPath(parent, name);
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/MessageUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/MessageUtils.java
deleted file mode 100644
index b36bda8808..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/MessageUtils.java
+++ /dev/null
@@ -1,313 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import javax.swing.JOptionPane;
-import javax.swing.UIManager;
-
-/**
- * Implements utilitary methods for displaying messages.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class MessageUtils {
-    
-    // holds the default width for the
-    // message body, in pixels
-    private static final int WIDTH = 250;
-    
-    // let's start the UI manager and set
-    // the default look and feel to be as
-    // close as possible to the system
-    static {
-        
-        // get the current look and feel
-        String laf = (String) ConfigurationController.
-                getInstance().get("ui.lookandfeel");
-        
-        // check if one is actually set
-        if (!laf.equals("none")) {
-        
-            // use a special keyword to indicate
-            // the use of a system look and feel
-            if (laf.equals("system")) {
-                laf = UIManager.getSystemLookAndFeelClassName();
-            }
-            
-            // let's try it, in case it fails,
-            // rely to the default look and feel
-            try {
-
-                // get the system look and feel name
-                // and try to set it as default
-                UIManager.setLookAndFeel(laf);
-            }
-            catch (Exception exception) {
-                // quack, quack, quack
-            }
-            
-        }
-    }
-    
-    /**
-     * Normalizes the icon type to one of the five available icons.
-     * @param value An integer value.
-     * @return The normalized integer value.
-     */
-    private static int normalizeIconType(int value) {
-        
-        // do the normalization according to the available
-        // icons in the underlying message implementation
-        switch (value) {
-            case 1:
-                value = JOptionPane.ERROR_MESSAGE;
-                break;
-            case 2:
-                value = JOptionPane.INFORMATION_MESSAGE;
-                break;
-            case 3:
-                value = JOptionPane.WARNING_MESSAGE;
-                break;
-            case 4:
-                value = JOptionPane.QUESTION_MESSAGE;
-                break;
-            default:
-                value = JOptionPane.PLAIN_MESSAGE;
-                break;
-        }
-        return value;
-    }
-    
-    /**
-     * Normalizes the message width, so only valid nonzero values are accepted.
-     * @param value An integer value corresponding to the message width.
-     * @return The normalized width.
-     */
-    private static int normalizeMessageWidth(int value) {
-        return (value > 0 ? value : WIDTH);
-    }
-    
-    /**
-     * Shows the message.
-     * @param width Integer value, in pixels.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     */
-    public static void showMessage(int width, int type,
-            String title, String text) {
-        
-        // effectively shows the message based
-        // on the provided parameters
-        JOptionPane.showMessageDialog(
-                null,
-                String.format(
-                        "<html><body style=\"width:%dpx\">%s</body></html>",
-                        normalizeMessageWidth(width),
-                        text
-                ),
-                title,
-                normalizeIconType(type)
-        );
-    }
-    
-    /**
-     * Shows the message. It relies on the default width.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     */
-    public static void showMessage(int type, String title, String text) {
-        showMessage(WIDTH, type, title, text);
-    }
-    
-    /**
-     * Shows a message with options presented as an array of buttons.
-     * @param width Integer value, in pixels.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @param buttons An array of objects to be presented as buttons.
-     * @return The index of the selected button, starting from 1.
-     */
-    public static int showOptions(int width, int type, String title,
-            String text, Object... buttons) {
-        
-        // returns the index of the selected button,
-        // zero if nothing is selected
-        return JOptionPane.showOptionDialog(
-                null,
-                String.format(
-                        "<html><body style=\"width:%dpx\">%s</body></html>",
-                        normalizeMessageWidth(width),
-                        text
-                ),
-                title,
-                JOptionPane.DEFAULT_OPTION,
-                normalizeIconType(type),
-                null,
-                buttons,
-                buttons[0]
-        ) + 1;
-    }
-    
-    /**
-     * Shows a message with options presented as an array of buttons. It relies
-     * on the default width.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @param buttons An array of objects to be presented as buttons.
-     * @return  The index of the selected button, starting from 1.
-     */
-    public static int showOptions(int type, String title,
-            String text, Object... buttons) {
-        return showOptions(WIDTH, type, title, text, buttons);
-    }
-    
-    /**
-     * Shows a message with a text input.
-     * @param width Integer value, in pixels.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @return The string representing the input text.
-     */
-    public static String showInput(int width, int type,
-            String title, String text) {
-        
-        // get the string from the
-        // input text, if any
-        String input = JOptionPane.showInputDialog(
-                null,
-                String.format(
-                        "<html><body style=\"width:%dpx\">%s</body></html>",
-                        normalizeMessageWidth(width),
-                        text
-                ),
-                title,
-                normalizeIconType(type)
-        );
-        
-        // if the input is not null, that is,
-        // the user actually typed something
-        if (input != null) {
-            
-            // return the trimmed string
-            return input.trim();
-        }
-        
-        // nothing was typed, so let's
-        // return an empty string
-        return "";      
-    }
-    
-    /**
-     * Shows a message with a text input. It relies on the default width.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @return The string representing the input text.
-     */
-    public static String showInput(int type, String title, String text) {
-        return showInput(WIDTH, type, title, text);
-    }
-    
-    /**
-     * Shows a message with options presented as a dropdown list of elements.
-     * @param width Integer value, in pixels.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @param elements An array of objects representing the elements.
-     * @return The index of the selected element, starting from 1.
-     */
-    public static int showDropdown(int width, int type, String title,
-            String text, Object... elements) {
-        
-        // show the dropdown list and get
-        // the selected object, if any
-        Object index = JOptionPane.showInputDialog(
-                null,
-                String.format(
-                        "<html><body style=\"width:%dpx\">%s</body></html>",
-                        normalizeMessageWidth(width),
-                        text
-                ),
-                title,
-                normalizeIconType(type),
-                null,
-                elements,
-                elements[0]
-        );
-        
-        // if it's not a null object, let's
-        // find the corresponding index
-        if (index != null) {
-            
-            // iterate through the array of elements
-            for (int i = 0; i < elements.length; i++) {
-                
-                // if the element is found, simply
-                // return the index plus 1, as zero
-                // corresponds to no selection at all
-                if (elements[i].equals(index)) {
-                    return i + 1;
-                }
-                
-            }
-        }
-        
-        // nothing was selected,
-        // simply return zero
-        return 0;
-    }
-    
-    /**
-     * Shows a message with options presented as a dropdown list of elements. It
-     * relies on the default width.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @param elements An array of objects representing the elements.
-     * @return The index of the selected element, starting from 1.
-     */
-    public static int showDropdown(int type, String title,
-            String text, Object... elements) {
-        return showDropdown(WIDTH, type, title, text, elements);
-    }
-    
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/Methods.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/Methods.java
deleted file mode 100644
index 24982dace9..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/Methods.java
+++ /dev/null
@@ -1,1368 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.controller.ConfigurationController;
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.model.AraraException;
-import com.github.cereda.arara.model.Command;
-import com.github.cereda.arara.model.Messages;
-import com.github.cereda.arara.model.Pair;
-import com.github.cereda.arara.model.Session;
-import com.github.cereda.arara.model.Trigger;
-import java.io.File;
-import java.util.Arrays;
-import java.util.List;
-import java.util.Map;
-
-/**
- * Implements some auxiliary methods for runtime evaluation.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Methods {
-
-    // the language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-    
-    // the session controller
-    private static final Session session = new Session();
-
-    /**
-     * Adds the rule methods to the provided map.
-     * @param map The map.
-     */
-    public static void addRuleMethods(Map<String, Object> map) {
-        addConditionalMethods(map);
-        try {
-            map.put("getOriginalFile", Methods.class.getMethod("getOriginalFile"));
-            map.put("getOriginalReference", Methods.class.getMethod("getOriginalReference"));
-            map.put("isEmpty", Methods.class.getMethod("isEmpty", String.class));
-            map.put("isNotEmpty", Methods.class.getMethod("isNotEmpty", String.class));
-            map.put("isEmpty", Methods.class.getMethod("isEmpty", String.class, Object.class));
-            map.put("isNotEmpty", Methods.class.getMethod("isNotEmpty", String.class, Object.class));
-            map.put("isEmpty", Methods.class.getMethod("isEmpty", String.class, Object.class, Object.class));
-            map.put("isNotEmpty", Methods.class.getMethod("isNotEmpty", String.class, Object.class, Object.class));
-            map.put("isTrue", Methods.class.getMethod("isTrue", String.class));
-            map.put("isFalse", Methods.class.getMethod("isFalse", String.class));
-            map.put("isTrue", Methods.class.getMethod("isTrue", String.class, Object.class));
-            map.put("isFalse", Methods.class.getMethod("isFalse", String.class, Object.class));
-            map.put("isTrue", Methods.class.getMethod("isTrue", String.class, Object.class, Object.class));
-            map.put("isFalse", Methods.class.getMethod("isFalse", String.class, Object.class, Object.class));
-            map.put("isTrue", Methods.class.getMethod("isTrue", String.class, Object.class, Object.class, Object.class));
-            map.put("isFalse", Methods.class.getMethod("isFalse", String.class, Object.class, Object.class, Object.class));
-            map.put("trimSpaces", Methods.class.getMethod("trimSpaces", String.class));
-            map.put("isTrue", Methods.class.getMethod("isTrue", boolean.class, Object.class));
-            map.put("isFalse", Methods.class.getMethod("isFalse", boolean.class, Object.class));
-            map.put("isTrue", Methods.class.getMethod("isTrue", boolean.class, Object.class, Object.class));
-            map.put("isFalse", Methods.class.getMethod("isFalse", boolean.class, Object.class, Object.class));
-            map.put("getBasename", Methods.class.getMethod("getBasename", File.class));
-            map.put("getBasename", Methods.class.getMethod("getBasename", String.class));
-            map.put("getFullBasename", Methods.class.getMethod("getFullBasename", File.class));
-            map.put("getFullBasename", Methods.class.getMethod("getFullBasename", String.class));
-            map.put("getFiletype", Methods.class.getMethod("getFiletype", File.class));
-            map.put("getFiletype", Methods.class.getMethod("getFiletype", String.class));
-            map.put("throwError", Methods.class.getMethod("throwError", String.class));
-            map.put("getSession", Methods.class.getMethod("getSession"));
-            map.put("isWindows", Methods.class.getMethod("isWindows"));
-            map.put("isLinux", Methods.class.getMethod("isLinux"));
-            map.put("isMac", Methods.class.getMethod("isMac"));
-            map.put("isUnix", Methods.class.getMethod("isUnix"));
-            map.put("isAIX", Methods.class.getMethod("isAIX"));
-            map.put("isIrix", Methods.class.getMethod("isIrix"));
-            map.put("isOS2", Methods.class.getMethod("isOS2"));
-            map.put("isSolaris", Methods.class.getMethod("isSolaris"));
-            map.put("isCygwin", Methods.class.getMethod("isCygwin"));
-            map.put("isWindows", Methods.class.getMethod("isWindows", Object.class, Object.class));
-            map.put("isLinux", Methods.class.getMethod("isLinux", Object.class, Object.class));
-            map.put("isMac", Methods.class.getMethod("isMac", Object.class, Object.class));
-            map.put("isUnix", Methods.class.getMethod("isUnix", Object.class, Object.class));
-            map.put("isAIX", Methods.class.getMethod("isAIX", Object.class, Object.class));
-            map.put("isIrix", Methods.class.getMethod("isIrix", Object.class, Object.class));
-            map.put("isOS2", Methods.class.getMethod("isOS2", Object.class, Object.class));
-            map.put("isSolaris", Methods.class.getMethod("isSolaris", Object.class, Object.class));
-            map.put("isCygwin", Methods.class.getMethod("isCygwin", Object.class, Object.class));
-            map.put("replicatePattern", Methods.class.getMethod("replicatePattern", String.class, List.class));
-            map.put("buildString", Methods.class.getMethod("buildString", Object[].class));
-            map.put("addQuotes", Methods.class.getMethod("addQuotes", Object.class));
-            map.put("getCommand", Methods.class.getMethod("getCommand", List.class));
-            map.put("getCommand", Methods.class.getMethod("getCommand", Object[].class));
-            map.put("getTrigger", Methods.class.getMethod("getTrigger", String.class));
-            map.put("getTrigger", Methods.class.getMethod("getTrigger", String.class, Object[].class));
-            map.put("checkClass", Methods.class.getMethod("checkClass", Class.class, Object.class));
-            map.put("isString", Methods.class.getMethod("isString", Object.class));
-            map.put("isList", Methods.class.getMethod("isList", Object.class));
-            map.put("isMap", Methods.class.getMethod("isMap", Object.class));
-            map.put("isBoolean", Methods.class.getMethod("isBoolean", Object.class));
-            map.put("isVerboseMode", Methods.class.getMethod("isVerboseMode"));
-            map.put("showMessage", Methods.class.getMethod("showMessage", int.class, String.class, String.class));
-            map.put("showMessage", Methods.class.getMethod("showMessage", int.class, int.class, String.class, String.class));
-            map.put("isOnPath", Methods.class.getMethod("isOnPath", String.class));
-            map.put("unsafelyExecuteSystemCommand", Methods.class.getMethod("unsafelyExecuteSystemCommand", Command.class));
-            map.put("mergeVelocityTemplate", Methods.class.getMethod("mergeVelocityTemplate", File.class, File.class, Map.class));
-            map.put("getCommandWithWorkingDirectory", Methods.class.getMethod("getCommandWithWorkingDirectory", String.class, List.class));
-            map.put("getCommandWithWorkingDirectory", Methods.class.getMethod("getCommandWithWorkingDirectory", String.class, Object[].class));
-            map.put("getCommandWithWorkingDirectory", Methods.class.getMethod("getCommandWithWorkingDirectory", File.class, List.class));
-            map.put("getCommandWithWorkingDirectory", Methods.class.getMethod("getCommandWithWorkingDirectory", File.class, Object[].class));
-            map.put("listFilesByExtensions", Methods.class.getMethod("listFilesByExtensions", File.class, List.class, boolean.class));
-            map.put("listFilesByExtensions", Methods.class.getMethod("listFilesByExtensions", String.class, List.class, boolean.class));
-            map.put("listFilesByPatterns", Methods.class.getMethod("listFilesByPatterns", File.class, List.class, boolean.class));
-            map.put("listFilesByPatterns", Methods.class.getMethod("listFilesByPatterns", String.class, List.class, boolean.class));
-            map.put("writeToFile", Methods.class.getMethod("writeToFile", File.class, String.class, boolean.class));
-            map.put("writeToFile", Methods.class.getMethod("writeToFile", File.class, List.class, boolean.class));
-            map.put("writeToFile", Methods.class.getMethod("writeToFile", String.class, String.class, boolean.class));
-            map.put("writeToFile", Methods.class.getMethod("writeToFile", String.class, List.class, boolean.class));
-            map.put("readFromFile", Methods.class.getMethod("readFromFile", File.class));
-            map.put("readFromFile", Methods.class.getMethod("readFromFile", String.class));
-            map.put("isSubdirectory", Methods.class.getMethod("isSubdirectory", File.class));
-        } catch (Exception exception) {
-            // quack, quack, quack
-        }
-    }
-
-    /**
-     * Adds conditional methods to the provided map.
-     * @param map The map.
-     */
-    public static void addConditionalMethods(Map<String, Object> map) {
-        try {
-            map.put("exists", Methods.class.getMethod("exists", String.class));
-            map.put("exists", Methods.class.getMethod("exists", File.class));
-            map.put("missing", Methods.class.getMethod("missing", String.class));
-            map.put("missing", Methods.class.getMethod("missing", File.class));
-            map.put("changed", Methods.class.getMethod("changed", String.class));
-            map.put("changed", Methods.class.getMethod("changed", File.class));
-            map.put("unchanged", Methods.class.getMethod("unchanged", String.class));
-            map.put("unchanged", Methods.class.getMethod("unchanged", File.class));
-            map.put("found", Methods.class.getMethod("found", String.class, String.class));
-            map.put("found", Methods.class.getMethod("found", File.class, String.class));
-            map.put("toFile", Methods.class.getMethod("toFile", String.class));
-            map.put("showDropdown", Methods.class.getMethod("showDropdown", int.class, String.class, String.class, Object[].class));
-            map.put("showDropdown", Methods.class.getMethod("showDropdown", int.class, int.class, String.class, String.class, Object[].class));
-            map.put("showInput", Methods.class.getMethod("showInput", int.class, String.class, String.class));
-            map.put("showInput", Methods.class.getMethod("showInput", int.class, int.class, String.class, String.class));
-            map.put("showOptions", Methods.class.getMethod("showOptions", int.class, String.class, String.class, Object[].class));
-            map.put("showOptions", Methods.class.getMethod("showOptions", int.class, int.class, String.class, String.class, Object[].class));
-            map.put("currentFile", Methods.class.getMethod("currentFile"));
-            map.put("loadClass", Methods.class.getMethod("loadClass", File.class, String.class));
-            map.put("loadClass", Methods.class.getMethod("loadClass", String.class, String.class));
-            map.put("loadObject", Methods.class.getMethod("loadObject", File.class, String.class));
-            map.put("loadObject", Methods.class.getMethod("loadObject", String.class, String.class));
-        } catch (Exception exception) {
-            // quack, quack, quack
-        }
-    }
-
-    /**
-     * Gets the original file.
-     * @return The original file.
-     */
-    public static String getOriginalFile() {
-        File file = (File) ConfigurationController.getInstance().get("execution.reference");
-        return file.getName();
-    }
-
-    /**
-     * Gets the original reference.
-     * @return The original reference.
-     */
-    public static File getOriginalReference() {
-        return (File) ConfigurationController.getInstance().get("execution.reference");
-    }
-
-    /**
-     * Checks if the string is empty.
-     * @param string The string.
-     * @return A boolean value.
-     */
-    public static boolean isEmpty(String string) {
-        return CommonUtils.checkEmptyString(string);
-    }
-
-    /**
-     * Checks if the string is not empty.
-     * @param string The string.
-     * @return A boolean value.
-     */
-    public static boolean isNotEmpty(String string) {
-        return !isEmpty(string);
-    }
-
-    /**
-     * Checks if the string is empty.
-     * @param string The string.
-     * @param yes Object to return if true.
-     * @return An object or empty string.
-     */
-    public static Object isEmpty(String string, Object yes) {
-        return isEmpty(string) ? yes : "";
-    }
-
-    /**
-     * Checks if the string is not empty.
-     * @param string The string.
-     * @param yes Object to return if true.
-     * @return An object or empty string.
-     */
-    public static Object isNotEmpty(String string, Object yes) {
-        return isNotEmpty(string) ? yes : "";
-    }
-
-    /**
-     * Checks if the string is empty.
-     * @param string The string.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     */
-    public static Object isEmpty(String string, Object yes, Object no) {
-        return isEmpty(string) ? yes : no;
-    }
-
-    /**
-     * Checks if the string is not empty.
-     * @param string The string.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     */
-    public static Object isNotEmpty(String string, Object yes, Object no) {
-        return isNotEmpty(string) ? yes : no;
-    }
-
-    /**
-     * Checks if the string holds a true value.
-     * @param string The string.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isTrue(String string) throws AraraException {
-        return isEmpty(string) ? false : CommonUtils.checkBoolean(string);
-    }
-
-    /**
-     * Checks if the string holds a false value.
-     * @param string The string.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isFalse(String string) throws AraraException {
-        return isEmpty(string) ? false : !CommonUtils.checkBoolean(string);
-    }
-
-    /**
-     * Checks if the string holds a true value.
-     * @param string The string.
-     * @param yes Object to return if true.
-     * @return An object or an empty string.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isTrue(String string, Object yes)
-            throws AraraException {
-        return isTrue(string) ? yes : "";
-    }
-
-    /**
-     * Checks if the string holds a false value.
-     * @param string The string.
-     * @param yes Object to return if true.
-     * @return An object or an empty string.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isFalse(String string, Object yes)
-            throws AraraException {
-        return (isFalse(string) ? yes : "");
-    }
-
-    /**
-     * Checks if the string holds a true value.
-     * @param string The string.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isTrue(String string, Object yes, Object no)
-            throws AraraException {
-        return (isTrue(string) ? yes : no);
-    }
-
-    /**
-     * Checks if the string holds a false value.
-     * @param string The string.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isFalse(String string, Object yes, Object no)
-            throws AraraException {
-        return (isFalse(string) ? yes : no);
-    }
-
-    /**
-     * Checks if the string holds a true value.
-     * @param string The string.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @param fallback Object to return if string is empty.
-     * @return One of the three options.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isTrue(String string, Object yes, Object no,
-            Object fallback) throws AraraException {
-        return isEmpty(string) ? fallback : (isTrue(string) ? yes : no);
-    }
-
-    /**
-     * Checks if the string holds a false value.
-     * @param string The string.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @param fallback Object to return if string is empty.
-     * @return One of the three options.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isFalse(String string, Object yes, Object no,
-            Object fallback) throws AraraException {
-        return isEmpty(string) ? fallback : (isFalse(string) ? yes : no);
-    }
-
-    /**
-     * Trim spaces from the string.
-     * @param string The string.
-     * @return A trimmed string.
-     */
-    public static String trimSpaces(String string) {
-        return string.trim();
-    }
-
-    /**
-     * Checks if the expression resolves to true.
-     * @param value The expression.
-     * @param yes Object to return if true.
-     * @return An object or an empty string.
-     */
-    public static Object isTrue(boolean value, Object yes) {
-        return value ? yes : "";
-    }
-
-    /**
-     * Checks if the expression resolves to false.
-     * @param value The expression.
-     * @param yes Object to return if true.
-     * @return An object or an empty string.
-     */
-    public static Object isFalse(boolean value, Object yes) {
-        return !value ? yes : "";
-    }
-
-    /**
-     * Checks if the expression resolves to true.
-     * @param value The expression.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     */
-    public static Object isTrue(boolean value, Object yes, Object no) {
-        return value ? yes : no;
-    }
-
-    /**
-     * Checks if the expression resolves to false.
-     * @param value The expression.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     */
-    public static Object isFalse(boolean value, Object yes, Object no) {
-        return !value ? yes : no;
-    }
-
-    /**
-     * Gets the basename.
-     * @param file The file.
-     * @return The basename of the provided file.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static String getBasename(File file) throws AraraException {
-        if (file.isFile()) {
-            return CommonUtils.getBasename(file);
-        } else {
-            throw new AraraException(
-                    CommonUtils.getRuleErrorHeader().concat(
-                            messages.getMessage(
-                                    Messages.ERROR_BASENAME_NOT_A_FILE,
-                                    file.getName()
-                            )
-                    )
-            );
-        }
-    }
-
-    /**
-     * Gets the basename.
-     * @param filename The string.
-     * @return The basename.
-     */
-    public static String getBasename(String filename) {
-        return CommonUtils.getBasename(filename);
-    }
-
-    /**
-     * Gets the file type.
-     * @param file The provided file.
-     * @return The file type.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels. 
-     */
-    public static String getFiletype(File file) throws AraraException {
-        if (file.isFile()) {
-            return CommonUtils.getFiletype(file);
-        } else {
-            throw new AraraException(
-                    CommonUtils.getRuleErrorHeader().concat(
-                            messages.getMessage(
-                                    Messages.ERROR_FILETYPE_NOT_A_FILE,
-                                    file.getName()
-                            )
-                    )
-            );
-        }
-    }
-
-    /**
-     * Gets the file type.
-     * @param filename The provided string.
-     * @return The file type.
-     */
-    public static String getFiletype(String filename) {
-        return CommonUtils.getFiletype(filename);
-    }
-
-    /**
-     * Replicates the pattern to each element of a list.
-     * @param pattern The pattern.
-     * @param values The list.
-     * @return A list of strings containing the pattern applied to the list.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static List<Object> replicatePattern(String pattern,
-            List<Object> values) throws AraraException {
-        return CommonUtils.replicateList(pattern, values);
-    }
-
-    /**
-     * Throws an exception.
-     * @param text The text to be thrown as the exception message.
-     * @throws AraraException The exception to be thrown by this method.
-     */
-    public static void throwError(String text) throws AraraException {
-        throw new AraraException(text);
-    }
-
-    /**
-     * Gets the session.
-     * @return The session.
-     */
-    public static Session getSession() {
-        return session;
-    }
-
-    /**
-     * Checks if Windows is the underlying operating system.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isWindows() throws AraraException {
-        return CommonUtils.checkOS("windows");
-    }
-    
-    /**
-     * Checks if we are inside a Cygwin environment.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isCygwin() throws AraraException {
-        return CommonUtils.checkOS("cygwin");
-    }
-
-    /**
-     * Checks if Linux is the underlying operating system.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isLinux() throws AraraException {
-        return CommonUtils.checkOS("linux");
-    }
-
-    /**
-     * Checks if Mac is the underlying operating system.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isMac() throws AraraException {
-        return CommonUtils.checkOS("mac");
-    }
-
-    /**
-     * Checks if Unix is the underlying operating system.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isUnix() throws AraraException {
-        return CommonUtils.checkOS("unix");
-    }
-
-    /**
-     * Checks if AIX is the underlying operating system.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isAIX() throws AraraException {
-        return CommonUtils.checkOS("aix");
-    }
-
-    /**
-     * Checks if Irix is the underlying operating system.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isIrix() throws AraraException {
-        return CommonUtils.checkOS("irix");
-    }
-
-    /**
-     * Checks if OS2 is the underlying operating system.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isOS2() throws AraraException {
-        return CommonUtils.checkOS("os2");
-    }
-
-    /**
-     * Checks if Solaris is the underlying operating system.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean isSolaris() throws AraraException {
-        return CommonUtils.checkOS("solaris");
-    }
-
-    /**
-     * Checks if Windows is the underlying operating system.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isWindows(Object yes, Object no)
-            throws AraraException {
-        return CommonUtils.checkOS("windows") ? yes : no;
-    }
-    
-    /**
-     * Checks if we are inside a Cygwin environment.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isCygwin(Object yes, Object no) throws AraraException {
-        return CommonUtils.checkOS("cygwin") ? yes : no;
-    }
-
-    /**
-     * Checks if Linux is the underlying operating system.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isLinux(Object yes, Object no) throws AraraException {
-        return CommonUtils.checkOS("linux") ? yes : no;
-    }
-
-    /**
-     * Checks if Mac is the underlying operating system.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isMac(Object yes, Object no) throws AraraException {
-        return CommonUtils.checkOS("mac") ? yes : no;
-    }
-
-    /**
-     * Checks if Unix is the underlying operating system.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isUnix(Object yes, Object no) throws AraraException {
-        return CommonUtils.checkOS("unix") ? yes : no;
-    }
-
-    /**
-     * Checks if AIX is the underlying operating system.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isAIX(Object yes, Object no) throws AraraException {
-        return CommonUtils.checkOS("aix") ? yes : no;
-    }
-
-    /**
-     * Checks if Irix is the underlying operating system.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isIrix(Object yes, Object no) throws AraraException {
-        return CommonUtils.checkOS("irix") ? yes : no;
-    }
-
-    /**
-     * Checks if OS2 is the underlying operating system.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isOS2(Object yes, Object no) throws AraraException {
-        return CommonUtils.checkOS("os2") ? yes : no;
-    }
-
-    /**
-     * Checks if Solaris is the underlying operating system.
-     * @param yes Object to return if true.
-     * @param no Object to return if false.
-     * @return One of the two objects.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Object isSolaris(Object yes, Object no) throws AraraException {
-        return CommonUtils.checkOS("solaris") ? yes : no;
-    }
-
-    /**
-     * Checks if the file exists according to its extension.
-     * @param extension The extension.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean exists(String extension) throws AraraException {
-        return CommonUtils.exists(extension);
-    }
-
-    /**
-     * Checks if the file is missing according to its extension.
-     * @param extension The extension.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean missing(String extension) throws AraraException {
-        return !exists(extension);
-    }
-
-    /**
-     * Checks if the file has changed, according to its extension.
-     * @param extension The extension.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean changed(String extension) throws AraraException {
-        return CommonUtils.hasChanged(extension);
-    }
-
-    /**
-     * Checks if the file is unchanged according to its extension.
-     * @param extension The extension.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean unchanged(String extension) throws AraraException {
-        return !changed(extension);
-    }
-
-    /**
-     * Checks if the file exists.
-     * @param filename The file.
-     * @return A boolean value.
-     */
-    public static boolean exists(File filename) {
-        return CommonUtils.exists(filename);
-    }
-
-    /**
-     * Checks if the file is missing.
-     * @param filename The file.
-     * @return A boolean value.
-     */
-    public static boolean missing(File filename) {
-        return !exists(filename);
-    }
-
-    /**
-     * Checks if the file has changed.
-     * @param filename The file.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean changed(File filename) throws AraraException {
-        return CommonUtils.hasChanged(filename);
-    }
-
-    /**
-     * Checks if the file is unchanged.
-     * @param filename The file.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean unchanged(File filename) throws AraraException {
-        return !changed(filename);
-    }
-
-    /**
-     * Build a string based on an array of objects.
-     * @param objects Array of objects.
-     * @return A string built from the array.
-     */
-    public static String buildString(Object... objects) {
-        return CommonUtils.generateString(objects);
-    }
-
-    /**
-     * Encloses the provided object into double quotes.
-     * @param object The object.
-     * @return The object enclosed in double quotes.
-     */
-    public static String addQuotes(Object object) {
-        return CommonUtils.addQuotes(object);
-    }
-
-    /**
-     * Checks if the file contains the regex, based on its extension.
-     * @param extension The extension.
-     * @param regex The regex.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean found(String extension, String regex)
-            throws AraraException {
-        return CommonUtils.checkRegex(extension, regex);
-    }
-
-    /**
-     * Checks if the file contains the provided regex.
-     * @param file The file.
-     * @param regex The regex.
-     * @return A boolean value.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static boolean found(File file, String regex) 
-            throws AraraException {
-        return CommonUtils.checkRegex(file, regex);
-    }
-
-    /**
-     * Gets the command based on a list of strings.
-     * @param elements The list of strings.
-     * @return A command.
-     */
-    public static Command getCommand(List<String> elements) {
-        return new Command(elements);
-    }
-
-    /**
-     * Gets the command based on an array of objects.
-     * @param elements Array of objects.
-     * @return A command.
-     */
-    public static Command getCommand(Object... elements) {
-        return new Command(elements);
-    }
-    
-    /**
-     * Gets the command based on an array of objects and with the provided
-     * working directory as string.
-     * @param path String path representing the working directory.
-     * @param elements Array of elements.
-     * @return A command.
-     */
-    public static Command getCommandWithWorkingDirectory(String path,
-            Object... elements) {
-        Command command = new Command(elements);
-        command.setWorkingDirectory(new File(path));
-        return command;
-    }
-    
-    /**
-     * Gets the command based on an array of objects and with the provided
-     * working directory as file.
-     * @param file File representing the working directory.
-     * @param elements Array of elements.
-     * @return A command.
-     */
-    public static Command getCommandWithWorkingDirectory(File file,
-            Object... elements) {
-        Command command = new Command(elements);
-        command.setWorkingDirectory(file);
-        return command;
-    }
-    
-    /**
-     * Gets the command based on a list of strings and with the provided
-     * working directory as string.
-     * @param path String path representing the working directory.
-     * @param elements List of strings.
-     * @return A command.
-     */
-    public static Command getCommandWithWorkingDirectory(String path,
-            List<String> elements) {
-        Command command = new Command(elements);
-        command.setWorkingDirectory(new File(path));
-        return command;
-    }
-    
-    /**
-     * Gets the command based on a list of strings and with the provided
-     * working directory as file.
-     * @param file File representing the working directory.
-     * @param elements List of strings.
-     * @return A command.
-     */
-    public static Command getCommandWithWorkingDirectory(File file,
-            List<String> elements) {
-        Command command = new Command(elements);
-        command.setWorkingDirectory(file);
-        return command;
-    }
-
-    /**
-     * Gets the trigger.
-     * @param action The action name.
-     * @return The trigger.
-     */
-    public static Trigger getTrigger(String action) {
-        return new Trigger(action, null);
-    }
-
-    /**
-     * Gets the trigger.
-     * @param action The action name.
-     * @param parameters The trigger parameters.
-     * @return A trigger.
-     */
-    public static Trigger getTrigger(String action, Object... parameters) {
-        return new Trigger(action, Arrays.asList(parameters));
-    }
-
-    /**
-     * Checks if the object is an intance of the provided class.
-     * @param clazz The class.
-     * @param object The object.
-     * @return A boolean value.
-     */
-    public static boolean checkClass(Class clazz, Object object) {
-        return CommonUtils.checkClass(clazz, object);
-    }
-
-    /**
-     * Checks if the object is a string.
-     * @param object The object.
-     * @return A boolean value.
-     */
-    public static boolean isString(Object object) {
-        return checkClass(String.class, object);
-    }
-
-    /**
-     * Checks if the object is a list.
-     * @param object The object.
-     * @return A boolean value.
-     */
-    public static boolean isList(Object object) {
-        return checkClass(List.class, object);
-    }
-
-    /**
-     * Checks if the object is a map.
-     * @param object The object.
-     * @return A boolean value.
-     */
-    public static boolean isMap(Object object) {
-        return checkClass(Map.class, object);
-    }
-
-    /**
-     * Checks if the object is a boolean.
-     * @param object The object.
-     * @return A boolean value.
-     */
-    public static boolean isBoolean(Object object) {
-        return checkClass(Boolean.class, object);
-    }
-    
-    /**
-     * Checks if the execution is in verbose mode.
-     * @return A boolean value indicating if the execution is in verbose mode.
-     */
-    public static boolean isVerboseMode() {
-        return (Boolean) ConfigurationController.
-                getInstance().get("execution.verbose");
-    }
-    
-    /**
-     * Returns a file object based on the provided name.
-     * @param name The file name.
-     * @return A file object.
-     */
-    public static File toFile(String name) {
-        return new File(name);
-    }
-    
-    /**
-     * Shows the message.
-     * @param width Integer value, in pixels.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     */
-    public static void showMessage(int width, int type,
-            String title, String text) {
-        MessageUtils.showMessage(width, type, title, text);
-    }
-    
-    /**
-     * Shows the message. It relies on the default width.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     */
-    public static void showMessage(int type, String title, String text) {
-        MessageUtils.showMessage(type, title, text);
-    }
-    
-    /**
-     * Shows a message with options presented as an array of buttons.
-     * @param width Integer value, in pixels.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @param buttons An array of objects to be presented as buttons.
-     * @return The index of the selected button, starting from 1.
-     */
-    public static int showOptions(int width, int type, String title,
-            String text, Object... buttons) {
-        return MessageUtils.showOptions(width, type, title, text, buttons);
-    }
-    
-    /**
-     * Shows a message with options presented as an array of buttons. It relies
-     * on the default width.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @param buttons An array of objects to be presented as buttons.
-     * @return  The index of the selected button, starting from 1.
-     */
-    public static int showOptions(int type, String title,
-            String text, Object... buttons) {
-        return MessageUtils.showOptions(type, title, text, buttons);
-    }
-    
-    /**
-     * Shows a message with a text input.
-     * @param width Integer value, in pixels.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @return The string representing the input text.
-     */
-    public static String showInput(int width, int type,
-            String title, String text) {
-        return MessageUtils.showInput(width, type, title, text);
-    }
-    
-    /**
-     * Shows a message with a text input. It relies on the default width.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @return The string representing the input text.
-     */
-    public static String showInput(int type, String title, String text) {
-        return MessageUtils.showInput(type, title, text);
-    }
-    
-    /**
-     * Shows a message with options presented as a dropdown list of elements.
-     * @param width Integer value, in pixels.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @param elements An array of objects representing the elements.
-     * @return The index of the selected element, starting from 1.
-     */
-    public static int showDropdown(int width, int type, String title,
-            String text, Object... elements) {
-        return MessageUtils.showDropdown(width, type, title, text, elements);
-    }
-    
-    /**
-     * Shows a message with options presented as a dropdown list of elements. It
-     * relies on the default width.
-     * @param type Type of message.
-     * @param title Title of the message.
-     * @param text Text of the message.
-     * @param elements An array of objects representing the elements.
-     * @return The index of the selected element, starting from 1.
-     */
-    public static int showDropdown(int type, String title,
-            String text, Object... elements) {
-        return MessageUtils.showDropdown(type, title, text, elements);
-    }
-    
-    /**
-     * Checks if the provided command name is reachable from the system path.
-     * @param command A string representing the command.
-     * @return A logic value.
-     */
-    public static boolean isOnPath(String command) {
-        return CommonUtils.isOnPath(command);
-    }
-    
-    /**
-     * Gets the full basename.
-     * @param file The file.
-     * @return The full basename of the provided file.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static String getFullBasename(File file) throws AraraException {
-        if (file.isFile()) {
-            return CommonUtils.getFullBasename(file);
-        } else {
-            throw new AraraException(
-                    CommonUtils.getRuleErrorHeader().concat(
-                            messages.getMessage(
-                                    Messages.ERROR_BASENAME_NOT_A_FILE,
-                                    file.getName()
-                            )
-                    )
-            );
-        }
-    }
-
-    /**
-     * Gets the full basename.
-     * @param name The string.
-     * @return The full basename.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static String getFullBasename(String name) throws AraraException {
-        return getFullBasename(new File(name));
-    }
-    
-    /**
-     * Unsafely executes a system command from the underlying operating system
-     * and returns a pair containing the exit status and the command output as a
-     * string.
-     * @param command The system command to be executed.
-     * @return A pair containing the exit status and the system command output
-     * as a string.
-     */
-    public static Pair<Integer, String>
-        unsafelyExecuteSystemCommand(Command command) {
-        return UnsafeUtils.executeSystemCommand(command);
-    }
-        
-    /**
-     * Merges the provided template with a context map and writes the result in
-     * an output file. This method relies on Apache Velocity.
-     * @param input The input file.
-     * @param output The output file.
-     * @param map The context map.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static void mergeVelocityTemplate(File input, File output,
-            Map<String, Object> map) throws AraraException {
-        VelocityUtils.mergeVelocityTemplate(input, output, map);
-    }
-    
-    /**
-     * Gets the file reference for the current directive. It is important to
-     * observe that version 4.0 of arara replicates the directive when 'files'
-     * is detected amongst the parameters, so each instance will have a
-     * different reference.
-     * @return A file reference for the current directive.
-     */
-    public static File currentFile() {
-        return (File) ConfigurationController.getInstance().
-                get("execution.directive.reference");
-    }
-    
-    /**
-     * Loads a class from the provided file, potentially a Java archive.
-     * @param file File containing the Java bytecode (namely, a JAR).
-     * @param name The canonical name of the class.
-     * @return A pair representing the status and the class.
-     */    
-    public static Pair<Integer, Class> loadClass(File file, String name) {
-        return ClassLoadingUtils.loadClass(file, name);
-    }
-    
-    /**
-     * Loads a class from the provided string reference, representing a file.
-     * @param ref String reference representing a file.
-     * @param name The canonical name of the class.
-     * @return A pair representing the status and the class.
-     */
-    public static Pair<Integer, Class> loadClass(String ref, String name) {
-        return ClassLoadingUtils.loadClass(new File(ref), name);
-    }
-    
-    /**
-     * Loads a class from the provided file, instantiating it.
-     * @param file File containing the Java bytecode (namely, a JAR).
-     * @param name The canonical name of the class.
-     * @return A pair representing the status and the class object.
-     */
-    public static Pair<Integer, Object> loadObject(File file, String name) {
-        return ClassLoadingUtils.loadObject(file, name);
-    }
-    
-    /**
-     * Loads a class from the provided string reference, instantiating it.
-     * @param ref String reference representing a file.
-     * @param name The canonical name of the class.
-     * @return A pair representing the status and the class object.
-     */
-    public static Pair<Integer, Object> loadObject(String ref, String name) {
-        return ClassLoadingUtils.loadObject(new File(ref), name);
-    }
-    
-    /**
-     * List all files from the provided directory according to the list of
-     * extensions. The leading dot must be omitted, unless it is part of the
-     * extension.
-     * @param directory The provided directory.
-     * @param extensions The list of extensions.
-     * @param recursive A flag indicating whether the search is recursive.
-     * @return A list of files.
-     */
-    public static List<File> listFilesByExtensions(File directory,
-            List<String> extensions, boolean recursive) {
-        return FileSearchingUtils.listFilesByExtensions(
-                directory,
-                extensions,
-                recursive
-        );
-    }
-
-    /**
-     * List all files from the provided string path according to the list of
-     * extensions. The leading dot must be omitted, unless it is part of the
-     * extension.
-     * @param path The provided path as plain string.
-     * @param extensions The list of extensions.
-     * @param recursive A flag indicating whether the search is recursive.
-     * @return A list of files.
-     */
-    public static List<File> listFilesByExtensions(String path,
-            List<String> extensions, boolean recursive) {
-        return FileSearchingUtils.listFilesByExtensions(
-                new File(path),
-                extensions,
-                recursive
-        );
-    }
-    
-    /**
-     * List all files from the provided directory matching the list of file
-     * name patterns. Such list can contain wildcards.
-     * @param directory The provided directory.
-     * @param patterns The list of file name patterns.
-     * @param recursive A flag indicating whether the search is recursive.
-     * @return A list of files.
-     */
-    public static List<File> listFilesByPatterns(File directory,
-            List<String> patterns, boolean recursive) {
-        return FileSearchingUtils.listFilesByPatterns(
-                directory,
-                patterns,
-                recursive
-        );
-    }
-    
-    /**
-     * List all files from the provided path matching the list of file
-     * name patterns. Such list can contain wildcards.
-     * @param path The provided path as plain string.
-     * @param patterns The list of file name patterns.
-     * @param recursive A flag indicating whether the search is recursive.
-     * @return A list of files.
-     */
-    public static List<File> listFilesByPatterns(String path,
-            List<String> patterns, boolean recursive) {
-        return FileSearchingUtils.listFilesByPatterns(
-                new File(path),
-                patterns,
-                recursive
-        );
-    }
-    
-    /**
-     * Writes the string to a file, using UTF-8 as default encoding.
-     * @param file The file.
-     * @param text The string to be written.
-     * @param append A flag whether to append the content.
-     * @return A logical value indicating whether it was successful.
-     */
-    public static boolean writeToFile(File file, String text, boolean append) {
-        return FileHandlingUtils.writeToFile(file, text, append);
-    }
-    
-    /**
-     * Writes the string to a file, using UTF-8 as default encoding.
-     * @param path The path.
-     * @param text The string to be written.
-     * @param append A flag whether to append the content.
-     * @return A logical value indicating whether it was successful.
-     */
-    public static boolean writeToFile(String path, String text,
-            boolean append) {
-        return FileHandlingUtils.writeToFile(new File(path), text, append);
-    }
-    
-    /**
-     * Writes the string list to a file, using UTF-8 as default encoding.
-     * @param file The file.
-     * @param lines The string list to be written.
-     * @param append A flag whether to append the content.
-     * @return A logical value indicating whether it was successful.
-     */
-    public static boolean writeToFile(File file, List<String> lines,
-            boolean append) {
-        return FileHandlingUtils.writeToFile(file, lines, append);
-    }
-    
-    /**
-     * Writes the string list to a file, using UTF-8 as default encoding.
-     * @param path The path.
-     * @param lines The string list to be written.
-     * @param append A flag whether to append the content.
-     * @return A logical value indicating whether it was successful.
-     */
-    public static boolean writeToFile(String path, List<String> lines,
-            boolean append) {
-        return FileHandlingUtils.writeToFile(new File(path), lines, append);
-    }
-    
-    /**
-     * Reads the provided file into a list of strings.
-     * @param file The file.
-     * @return A list of strings.
-     */
-    public static List<String> readFromFile(File file) {
-        return FileHandlingUtils.readFromFile(file);
-    }
-    
-    /**
-     * Reads the provided file into a list of strings.
-     * @param path The path.
-     * @return A list of strings.
-     */
-    public static List<String> readFromFile(String path) {
-        return FileHandlingUtils.readFromFile(new File(path));
-    }
-    
-    /**
-     * Checks whether a directory is under the project directory.
-     * @param directory The directory to be inspected.
-     * @return Logical value indicating whether the directoy is under root.
-     * @throws AraraException There was a problem with path retrieval.
-     */
-    public static boolean isSubdirectory(File directory)
-            throws AraraException {
-        return CommonUtils.isSubDirectory(directory, getOriginalReference());
-    }
-    
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/RuleUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/RuleUtils.java
deleted file mode 100644
index f2fb1c8570..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/RuleUtils.java
+++ /dev/null
@@ -1,244 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.model.AraraException;
-import com.github.cereda.arara.model.Argument;
-import com.github.cereda.arara.model.Messages;
-import com.github.cereda.arara.model.RuleCommand;
-import com.github.cereda.arara.model.Rule;
-import java.io.File;
-import java.io.FileReader;
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.List;
-import org.apache.commons.collections4.CollectionUtils;
-import org.apache.commons.collections4.Predicate;
-import org.yaml.snakeyaml.Yaml;
-import org.yaml.snakeyaml.constructor.Constructor;
-import org.yaml.snakeyaml.error.MarkedYAMLException;
-import org.yaml.snakeyaml.nodes.Tag;
-import org.yaml.snakeyaml.representer.Representer;
-
-/**
- * Implements rule utilitary methods.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class RuleUtils {
-
-    // the application messages obtained from the
-    // language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-
-    /**
-     * Parses the provided file, checks the identifier and returns a rule
-     * representation.
-     * @param file The rule file.
-     * @param identifier The directive identifier.
-     * @return The rule object.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    public static Rule parseRule(File file, String identifier)
-            throws AraraException {
-        Representer representer = new Representer();
-        representer.addClassTag(Rule.class, new Tag("!config"));
-        Yaml yaml = new Yaml(new Constructor(Rule.class), representer);
-        Rule rule = null;
-        try {
-            rule = yaml.loadAs(new FileReader(file), Rule.class);
-        } catch (MarkedYAMLException yamlException) {
-            throw new AraraException(
-                    CommonUtils.getRuleErrorHeader().concat(
-                            messages.getMessage(
-                                    Messages.ERROR_PARSERULE_INVALID_YAML
-                            )
-                    ),
-                    yamlException
-            );
-        } catch (Exception exception) {
-            throw new AraraException(
-                    CommonUtils.getRuleErrorHeader().concat(
-                            messages.getMessage(
-                                    Messages.ERROR_PARSERULE_GENERIC_ERROR
-                            )
-                    )
-            );
-        }
-        validateHeader(rule, identifier);
-        validateBody(rule);
-        return rule;
-    }
-
-    /**
-     * Validates the rule header according to the directive identifier.
-     * @param rule The rule object.
-     * @param identifier The directive identifier.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private static void validateHeader(Rule rule, String identifier)
-            throws AraraException {
-        if (rule.getIdentifier() != null) {
-            if (!rule.getIdentifier().equals(identifier)) {
-                throw new AraraException(CommonUtils.getRuleErrorHeader().
-                        concat(
-                                messages.getMessage(
-                                        Messages.ERROR_VALIDATEHEADER_WRONG_IDENTIFIER,
-                                        rule.getIdentifier(),
-                                        identifier
-                                )
-                        )
-                );
-            }
-        } else {
-            throw new AraraException(
-                    CommonUtils.getRuleErrorHeader().concat(
-                            messages.getMessage(
-                                    Messages.ERROR_VALIDATEHEADER_NULL_ID
-                            )
-                    )
-            );
-        }
-        if (rule.getName() == null) {
-            throw new AraraException(
-                    CommonUtils.getRuleErrorHeader().concat(
-                            messages.getMessage(
-                                    Messages.ERROR_VALIDATEHEADER_NULL_NAME
-                            )
-                    )
-            );
-        }
-    }
-
-    /**
-     * Validates the rule body.
-     * @param rule The rule object.
-     * @throws AraraException Something wrong happened, to be caught in the
-     * higher levels.
-     */
-    private static void validateBody(Rule rule) throws AraraException {
-        if (rule.getCommands() == null) {
-            throw new AraraException(
-                    CommonUtils.getRuleErrorHeader().concat(
-                            messages.getMessage(
-                                    Messages.ERROR_VALIDATEBODY_NULL_COMMANDS_LIST
-                            )
-                    )
-            );
-        } else {
-            if (CollectionUtils.exists(rule.getCommands(),
-                    new Predicate<RuleCommand>() {
-                public boolean evaluate(RuleCommand command) {
-                    return (command.getCommand() == null);
-                }
-            })) {
-                throw new AraraException(CommonUtils.getRuleErrorHeader().
-                        concat(
-                                messages.getMessage(
-                                        Messages.ERROR_VALIDATEBODY_NULL_COMMAND
-                                )
-                        )
-                );
-            }
-        }
-        if (rule.getArguments() == null) {
-            throw new AraraException(
-                    CommonUtils.getRuleErrorHeader().concat(
-                            messages.getMessage(
-                                    Messages.ERROR_VALIDATEBODY_ARGUMENTS_LIST
-                            )
-                    )
-            );
-        } else {
-            String[] keywords = new String[]{"file", "files", "reference"};
-
-            List<String> arguments = new ArrayList<String>();
-            for (Argument argument : rule.getArguments()) {
-                if (argument.getIdentifier() != null) {
-                    if ((argument.getFlag() != null) ||
-                            (argument.getDefault() != null)) {
-                        arguments.add(argument.getIdentifier());
-                    } else {
-                        throw new AraraException(
-                                CommonUtils.getRuleErrorHeader().concat(
-                                        messages.getMessage(
-                                                Messages.ERROR_VALIDATEBODY_MISSING_KEYS
-                                        )
-                                )
-                        );
-                    }
-                } else {
-                    throw new AraraException(
-                            CommonUtils.getRuleErrorHeader().concat(
-                                    messages.getMessage(
-                                            Messages.ERROR_VALIDATEBODY_NULL_ARGUMENT_ID
-                                    )
-                            )
-                    );
-                }
-            }
-
-            for (String keyword : keywords) {
-                if (arguments.contains(keyword)) {
-                    throw new AraraException(
-                            CommonUtils.getRuleErrorHeader().concat(
-                                    messages.getMessage(
-                                            Messages.ERROR_VALIDATEBODY_ARGUMENT_ID_IS_RESERVED,
-                                            keyword
-                                    )
-                            )
-                    );
-                }
-            }
-
-            int expected = arguments.size();
-            int found = (new HashSet<String>(arguments)).size();
-            if (expected != found) {
-                throw new AraraException(
-                        CommonUtils.getRuleErrorHeader().concat(
-                                messages.getMessage(
-                                        Messages.ERROR_VALIDATEBODY_DUPLICATE_ARGUMENT_IDENTIFIERS
-                                )
-                        )
-                );
-            }
-        }
-    }
-
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/TeeOutputStream.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/TeeOutputStream.java
deleted file mode 100644
index 58418ea62d..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/TeeOutputStream.java
+++ /dev/null
@@ -1,109 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import java.io.IOException;
-import java.io.OutputStream;
-import org.apache.commons.io.IOUtils;
-
-/**
- * Implements a stream splitter.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class TeeOutputStream extends OutputStream {
-
-    // an array of streams in which
-    // an object of this class will
-    // split data
-    private final OutputStream[] streams;
-
-    /**
-     * Constructor.
-     * @param outputStreams An array of output streams.
-     */
-    public TeeOutputStream(OutputStream... outputStreams) {
-        streams = outputStreams;
-    }
-
-    /**
-     * Writes the provided integer to each stream.
-     * @param b The provided integer
-     * @throws IOException An IO exception.
-     */
-    @Override
-    public void write(int b) throws IOException {
-        for (OutputStream ostream : streams) {
-            ostream.write(b);
-        }
-    }
-
-    /**
-     * Writes the provided byte array to each stream, with the provided offset
-     * and length.
-     * @param b The byte array.
-     * @param offset The offset.
-     * @param length The length.
-     * @throws IOException An IO exception.
-     */
-    @Override
-    public void write(byte[] b, int offset, int length) throws IOException {
-        for (OutputStream ostream : streams) {
-            ostream.write(b, offset, length);
-        }
-    }
-
-    /**
-     * Flushes every stream.
-     * @throws IOException An IO exception.
-     */
-    @Override
-    public void flush() throws IOException {
-        for (OutputStream ostream : streams) {
-            ostream.flush();
-        }
-    }
-
-    /**
-     * Closes every stream silently.
-     */
-    @Override
-    public void close() {
-        for (OutputStream ostream : streams) {
-            IOUtils.closeQuietly(ostream);
-        }
-    }
-    
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/UnsafeUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/UnsafeUtils.java
deleted file mode 100644
index d5a4058b3e..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/UnsafeUtils.java
+++ /dev/null
@@ -1,87 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.model.Command;
-import com.github.cereda.arara.model.Pair;
-import org.zeroturnaround.exec.ProcessExecutor;
-import org.zeroturnaround.exec.ProcessResult;
-
-/**
- * Implements unsafe utilitary methods.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class UnsafeUtils {
-    
-    /**
-     * Executes a system command from the underlying operating system and
-     * returns a pair containing the exit status and the command output as a
-     * string.
-     * @param command The system command to be executed.
-     * @return A pair containing the exit status and the system command output
-     * as a string.
-     */
-    public static Pair<Integer, String> executeSystemCommand(Command command) {
-        
-        try {
-            
-            // create a process result with the provided
-            // command, capturing the output
-            ProcessResult result = new ProcessExecutor(
-                    command.getElements()
-            ).readOutput(true).execute();
-            
-            // return the pair containing the exit status
-            // and the output string as UTF-8
-            return new Pair<Integer, String>(
-                    result.getExitValue(),
-                    result.outputUTF8()
-            );
-            
-        } catch (Exception exception) {
-            
-            // quack, quack, do nothing, just
-            // return a default error code
-            
-            // if something goes wrong, the default
-            // error branch returns an exit status of
-            // -99 and an empty string
-            return new Pair<Integer, String>(-99, "");
-            
-        }
-    }
-    
-}
diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/VelocityUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/VelocityUtils.java
deleted file mode 100644
index 3f94adc909..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/VelocityUtils.java
+++ /dev/null
@@ -1,157 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda 
- * All rights reserved.
- *
- * Redistribution and  use in source  and binary forms, with  or without
- * modification, are  permitted provided  that the  following conditions
- * are met:
- *
- * 1. Redistributions  of source  code must  retain the  above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form  must reproduce the above copyright
- * notice, this list  of conditions and the following  disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither  the name  of the  project's author nor  the names  of its
- * contributors may be used to  endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS  PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS
- * "AS IS"  AND ANY  EXPRESS OR IMPLIED  WARRANTIES, INCLUDING,  BUT NOT
- * LIMITED  TO, THE  IMPLIED WARRANTIES  OF MERCHANTABILITY  AND FITNESS
- * FOR  A PARTICULAR  PURPOSE  ARE  DISCLAIMED. IN  NO  EVENT SHALL  THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY,  OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT  NOT LIMITED  TO, PROCUREMENT  OF SUBSTITUTE  GOODS OR  SERVICES;
- * LOSS  OF USE,  DATA, OR  PROFITS; OR  BUSINESS INTERRUPTION)  HOWEVER
- * CAUSED AND  ON ANY THEORY  OF LIABILITY, WHETHER IN  CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY  OUT  OF  THE USE  OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.controller.LanguageController;
-import com.github.cereda.arara.model.AraraException;
-import com.github.cereda.arara.model.Messages;
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.OutputStreamWriter;
-import java.io.Writer;
-import java.util.Map;
-import org.apache.velocity.Template;
-import org.apache.velocity.VelocityContext;
-import org.apache.velocity.app.VelocityEngine;
-import org.apache.velocity.exception.MethodInvocationException;
-import org.apache.velocity.exception.ParseErrorException;
-import org.apache.velocity.exception.ResourceNotFoundException;
-import org.apache.velocity.runtime.RuntimeConstants;
-
-/**
- * Implements the template merging from Apache Velocity.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class VelocityUtils {
-    
-    // the language controller
-    private static final LanguageController messages =
-            LanguageController.getInstance();
-    
-    /**
-     * Merges the provided template with the context map and writes the result
-     * in an output file. The operation relies on the Apache Velocity project.
-     * @param input The input file.
-     * @param output The output file.
-     * @param map The context map.
-     * @throws AraraException Something terribly wrong happened, to be caught
-     * in the higher levels.
-     */
-    public static void mergeVelocityTemplate(File input, File output,
-            Map<String, Object> map) throws AraraException {
-        
-        // let us try
-        try {
-            
-            // create the template engine instance
-            VelocityEngine engine = new VelocityEngine();
-            
-            // use the resource path trick: set the default
-            // location to the input file's parent directory,
-            // so our file is easily located
-            engine.setProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH,
-                    input.getCanonicalFile().getParent());
-            
-            // set the logging feature of Apache Velocity to
-            // register the occurrences in a null provider
-            // (we do not want unnecessary verbose output)
-            engine.setProperty(RuntimeConstants.RUNTIME_LOG_LOGSYSTEM_CLASS,
-                    "org.apache.velocity.runtime.log.NullLogSystem");
-            
-            // init the engine with the
-            // provided settings
-            engine.init();
-            
-            // create a context for Apache Velocity,
-            // based on the provided map
-            VelocityContext context = new VelocityContext(map);
-            
-            // get the template from the engine and
-            // read it as an UTF-8 file
-            Template template = engine.getTemplate(input.getName(), "UTF-8");
-            
-            // create an output stream from
-            // the file output reference
-            FileOutputStream stream = new FileOutputStream(output);
-            
-            // create a writer based on the
-            // previously created stream
-            Writer writer = new OutputStreamWriter(stream, "UTF-8");
-            
-            // merge the context map with the
-            // template file and write the result
-            // to the output stream writer
-            template.merge(context, writer);
-            
-            // close both writer
-            // and output stream
-            writer.close();
-            stream.close();
-            
-        } catch(ResourceNotFoundException rnfexception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_VELOCITY_FILE_NOT_FOUND
-                    ),
-                    rnfexception
-            );
-        } catch(ParseErrorException peexception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_VELOCITY_PARSE_EXCEPTION
-                    ),
-                    peexception
-            );
-        } catch(MethodInvocationException miexception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_VELOCITY_METHOD_INVOCATION_EXCEPTION
-                    ),
-                    miexception
-            );
-        } catch (IOException ioexception) {
-            throw new AraraException(
-                    messages.getMessage(
-                            Messages.ERROR_VELOCITY_FILE_NOT_FOUND
-                    ),
-                    ioexception
-            );
-        }
-        
-    }
-    
-}