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#!/bin/bash
<<'LATEX'
== dtxgen - generate template for LaTeX self-extracting .dtx file

== Usage 

  dtxgen [options] basename.[sty|cls]

== Options

\B{dtxgen} recognizes the following options:

\tabtx
|-s, --short=...|&
A short, one-liner, description for the class or package. By default, the
string `A new LaTeX class' or `A new LaTeX package' will be used.\\

|-n, --name=...|&
Your name (first name, followed by surname). Alternatively, you can set a
default value in the environment variable |NAME|; if you do so and still
use this option, the option's value will have priority.\\

|-m, --mail=...|&
Your email address. Alternatively, you can set a default value in the
environment variable |EMAIL|; if you do so and still use this option, the
option's value will have priority.\\

|-c, --class=...|&
For class templates only: inserts a |\LoadClass{...}|, so that the new
class will start with the properties of the \F{...} class. The default is
\F{article}.\\

|-d, --date=...|&
Set the initial version's date. By default, the current date will be used.
The date should be entered in the |yyyymmdd| format, although it will be
stored the LaTeX way: |yyyy/mm/dd|.\\

|-V, --version|&
Prints the script's version and exits.\\

|-h, --help|&
Prints help information and exits.\\
\end{tabularx}

== Description

This script is based on the self-extracting model dtx file described by
Joseph Wright, see\\\url{http://www.texdev.net/2009/10/06/a-model-dtx-file/}.

You can use \B{dtxgen} when you decide to create a new LaTeX class or style. 
For example, when you decide to make a class named \S{myclass}, you could run:

  dtxgen -n 'your name' -m 'your@email.ad' myclass.cls

or, if you have an environment with your name and email address defined in
NAME and EMAIL, you could simply type:

  dtxgen myclass.cls

and you would end up with five files: \F{myclass.dtx}, \F{myclass.cls}, 
\F{myclass.pdf}, \F{README}, and \F{Makefile}.

The resulting .dtx file is a template file in which some minimal example
content will have to be replaced with real content, but the dates,
basename, author's name and email address are already in place and,
depending on whether you use used a .cls or a .sty extension in the
argument, it is formatted to be either a class or a package source file.

== Makefile

The \F{Makefile} can be used to compile new versions of your work; it contains the following targets:

\tabtx
all       & (the default) generate the style or class file, the pdf-documentation, and a README file.\\
distclean & remove all files that can be regenerated,\\
clean     & same, except the style or class file, the pdf-documentation, and a README file.\\
inst      & install in the user's TeX tree,\\
install   & install in the local TeX tree (uses sudo)\\
zip       & produce a zip file ready for upload to CTAN
\end{tabularx}

LATEX

VERSION=1.01
MYNAME=`basename $0`

function help {
   cat <<-EOF
	This is dtxgen version $VERSION

	Usage: dtxgen [options] filename.[cls|sty]
	
	Options:
	-h, --help      print this help and exit
	-v, --version   print version and exit
	-s, --short     short description; default: A new LaTeX package/class
	-d, --date      date in yyyymmdd format; default: today (`date +%Y%m%d`) 
	-n, --name      author's name; default: \$NAME (${NAME:-(not set)})
	-m, --mail      author's email address; default: \$EMAIL (${EMAIL:-(not set)})
	-c, --class     for class files: the class to be \\LoadClass\'d; default: article
	-q, --quiet	be quiet
	EOF
}

# print error message, remove temporary files, and exit
function die {
   echo -e "$*"
   exit 1
}

# using the label in arg 2, read template from my self, filter it
# throught the script in arg 1, and write the output to the file in arg 3.
# The default for arg 3 is arg 2
function createfile {
   FILE=$3
   test "$FILE" = "" && FILE=$2
   sed -n "/^<<'$2'/,/^$2/p" $0 |tail -n +2 |head -n -1 |sed "$1" >$FILE
}

test ${BASH_VERSINFO[0]} -ge 4 ||
  die Your bash has version $BASH_VERSION, but it should be at least version 4
type sed >&/dev/null ||
  die dtxgen needs sed, but sed is not in your PATH

if ! options=$(getopt -o s:n:m:c:d:hvqI \
                      -l help,short:,name:,mail:,class:,date:,version,quiet -- "$@"); then exit 1; fi
eval set -- "$options"

while [ $# -gt 0 ]; do
   case $1 in
   -h|--help)    help;               exit 0;;
   -v|--version) echo $VERSION;      exit 0;;
   -s|--short)   short=$2;          shift 2;;
   -d|--date)    date=$2;           shift 2;;
   -m|--mail)    mail=$2;           shift 2;;
   -n|--name) 	 name=$2;           shift 2;;
   -c|--class)   loadclass=$2;      shift 2;;
   -q|--quiet)   quiet=--quiet;       shift;;
   -I)           instscript $MYNAME; exit 0;; # not for general use
   (--)          shift;               break;;
   (*)           break;;
   esac
done

name=${name:-${NAME:-(not set)}}
mail=${mail:-${EMAIL:-(not set)}}
date=${date:-`date +%Y%m%d`}
year=${date:0:4}
loadclass=${loadclass:-article}

# date must be 8 digits; insert the two /'s:
if [[ ! $date =~ ^[[:digit:]]{8}$ ]]; then die illegal date; fi
date=`sed 's/\(....\)\(..\)\(..\)/\1\\\\\/\2\\\\\/\3/' <<<$date`

# argument must have .clls or .sty extension:
read base ext <<<`echo $1 |sed  's/\./ /'`

case "$ext" in
cls) typ=class; Typ=Class;
     short=${short:-A new LaTeX class}
     lcl='\\LoadClass[a4paper,fleqn]{'"$loadclass}"
     ;;
sty) typ=package; Typ=Package;
     short=${short:-A new LaTeX package}
     use='\\usepackage{\\jobname}'
     ;;
*)   die "The argument must have .cls or .sty extension
         (try the --help option)"
esac

# The short description may contain TeX commands, but then we need 
# a version without them at some places; note that this removes only 
# simple contructs:
shrt=`sed 's/\\\\[[:alpha:]]\\+{\\([^}]*\\)}/\\1/g;s/\\\\//g' <<<$short`

# Any \'s in the short description need to be duplicated for the script:
short=`sed 's/\\\\/\\\\\\\\/g' <<<$short`

test -z "$mail" && die "author's email not set - use option or environment variable EMAIL"
test -z "$name" && die "author's name not set - use option or environment variable NAME"

# sed script replacing the variables in the templates:
for i in base year ext mail use typ Typ name date short shrt lcl; do
  eval v=\$$i
  test $quiet || echo "$i	$v"|sed 's/\\\\/\\/g'
  script="${script}s/%$i%/$v/g;"
done

createfile "$script" Makefile
createfile "$script" DTX $base.dtx
make $quiet
exit 0

# ---- TEMPLATES: ----
<<'Makefile'
NAME  = %base%
SHELL = bash
PWD   = $(shell pwd)
TEMP := $(shell mktemp -d)
TDIR  = $(TEMP)/$(NAME)
VERS  = $(shell ltxfileinfo -v $(NAME).dtx)
LOCAL = $(shell kpsewhich --var-value TEXMFLOCAL)
UTREE = $(shell kpsewhich --var-value TEXMFHOME)
all:	$(NAME).pdf clean
	test -e README.txt && mv README.txt README || exit 0
$(NAME).pdf: $(NAME).dtx
	pdflatex -shell-escape -recorder -interaction=batchmode $(NAME).dtx >/dev/null
	if [ -f $(NAME).glo ]; then makeindex -q -s gglo.ist -o $(NAME).gls $(NAME).glo; fi
	if [ -f $(NAME).idx ]; then makeindex -q -s gind.ist -o $(NAME).ind $(NAME).idx; fi
	pdflatex --recorder --interaction=nonstopmode $(NAME).dtx > /dev/null
clean:
	rm -f $(NAME).{aux,fls,glo,gls,hd,idx,ilg,ind,ins,log,out}
distclean: clean
	rm -f $(NAME).{pdf,%ext%} README Makefile
inst: all
	mkdir -p $(UTREE)/{tex,source,doc}/latex/$(NAME)
	cp $(NAME).dtx $(UTREE)/source/latex/$(NAME)
	cp $(NAME).%ext% $(UTREE)/tex/latex/$(NAME)
	cp $(NAME).pdf $(UTREE)/doc/latex/$(NAME)
install: all
	sudo mkdir -p $(LOCAL)/{tex,source,doc}/latex/$(NAME)
	sudo cp $(NAME).dtx $(LOCAL)/source/latex/$(NAME)
	sudo cp $(NAME).%ext% $(LOCAL)/tex/latex/$(NAME)
	sudo cp $(NAME).pdf $(LOCAL)/doc/latex/$(NAME)
zip: all
	mkdir $(TDIR)
	cp $(NAME).{pdf,%ext%,dtx} README $(TDIR)
	cd $(TEMP); zip -Drq $(PWD)/$(NAME)-$(VERS).zip $(NAME)
Makefile

<<'DTX'
% \iffalse meta-comment
%<*internal>
\iffalse
%</internal>
%<*readme>
----------------------------------------------------------------
%base% --- %shrt%
Author:  %name%
E-mail:  %mail%
License: Released under the LaTeX Project Public License v1.3c or later
See:     http://www.latex-project.org/lppl.txt
----------------------------------------------------------------

Some text about the %typ%: probably the same as the abstract.
%</readme>
%<*internal>
\fi
\def\nameofplainTeX{plain}
\ifx\fmtname\nameofplainTeX\else
  \expandafter\begingroup
\fi
%</internal>
%<*install>
\input docstrip.tex
\keepsilent
\askforoverwritefalse
\preamble
----------------------------------------------------------------
%base% --- %shrt%
Author:  %name%
E-mail:  %mail%
License: Released under the LaTeX Project Public License v1.3c or later
See:     http://www.latex-project.org/lppl.txt
----------------------------------------------------------------

\endpreamble
\postamble

Copyright (C) %year% by %name% <%mail%>

This work may be distributed and/or modified under the
conditions of the LaTeX Project Public License (LPPL), either
version 1.3c of this license or (at your option) any later
version.  The latest version of this license is in the file:

http://www.latex-project.org/lppl.txt

This work is "maintained" (as per LPPL maintenance status) by
%name%.

This work consists of the file %base%.dtx and a Makefile.
Running make generates the derived files README.txt, %base%.pdf and %base%.%ext%.
Running make inst installs the files in the user's TeX tree.
Running make install installs the files in the local TeX tree.

\endpostamble

\usedir{tex/latex/%base%}
\generate{
  \file{\jobname.%ext%}{\from{\jobname.dtx}{%typ%}}
}
%</install>
%<install>\endbatchfile
%<*internal>
\usedir{source/latex/%base%}
\generate{
  \file{\jobname.ins}{\from{\jobname.dtx}{install}}
}
\nopreamble\nopostamble
\usedir{doc/latex/%base%}
\generate{
  \file{README.txt}{\from{\jobname.dtx}{readme}}
}
\ifx\fmtname\nameofplainTeX
  \expandafter\endbatchfile
\else
  \expandafter\endgroup
\fi
%</internal>
% \fi
%
% \iffalse
%<*driver>
\ProvidesFile{%base%.dtx}
%</driver>
%<%typ%>\NeedsTeXFormat{LaTeX2e}[1999/12/01]
%<%typ%>\Provides%Typ%{%base%}
%<*%typ%>
    [%date% v1.00 %shrt%]
%</%typ%>
%<*driver>
\documentclass{ltxdoc}
\usepackage[a4paper,margin=25mm,left=50mm,nohead]{geometry}
\usepackage[numbered]{hypdoc}
%use%
\EnableCrossrefs
\CodelineIndex
\RecordChanges
\begin{document}
  \DocInput{\jobname.dtx}
\end{document}
%</driver>
% \fi
%
% \GetFileInfo{\jobname.dtx}
% \DoNotIndex{\newcommand,\newenvironment}
%
%\title{\textsf{%base%} --- %short%\thanks{This file 
%   describes version \fileversion, last revised \filedate.}
%}
%\author{%name%\thanks{E-mail: %mail%}}
%\date{Released \filedate}
%
%\maketitle
%
%\changes{v1.00}{%date%}{First public release}
%
% \begin{abstract}
% ==== Put abstract text here. ====
% \end{abstract}
%
% \section{Usage}
%
% ==== Put descriptive text here. ====
%
% \DescribeMacro{\dummyMacro}
% This macro does nothing.\index{doing nothing|usage} It is merely an
% example.  If this were a real macro, you would put a paragraph here
% describing what the macro is supposed to do, what its mandatory and
% optional arguments are, and so forth.
%
% \DescribeEnv{dummyEnv}
% This environment does nothing.  It is merely an example.
% If this were a real environment, you would put a paragraph here
% describing what the environment is supposed to do, what its
% mandatory and optional arguments are, and so forth.
%
%\StopEventually{^^A
%  \PrintChanges
%  \PrintIndex
%}
%
% \section{Implementation}
%
%    \begin{macrocode}
%<*%typ%>
%lcl%
%    \end{macrocode}
% \begin{macro}{\dummyMacro}
% This is a dummy macro.  If it did anything, we'd describe its
% implementation here.
%    \begin{macrocode}
\newcommand{\dummyMacro}{}
%    \end{macrocode}
% \end{macro}
%
% \begin{environment}{dummyEnv}
% This is a dummy environment.  If it did anything, we'd describe its
% implementation here.
%    \begin{macrocode}
\newenvironment{dummyEnv}{%
}{%
%    \end{macrocode}
% \changes{v1.00a}{%date%}{Added a spurious change log entry to
%   show what a change \emph{within} an environment definition looks
%   like.}
% Don't use |%| to introduce a code comment within a |macrocode|
% environment.  Instead, you should typeset all of your comments with
% LaTeX---doing so gives much prettier results.  For comments within a
% macro/environment body, just do an |\end{macrocode}|, include some
% commentary, and do another |\begin{macrocode}|.  It's that simple.
%    \begin{macrocode}
}
%    \end{macrocode}
% \end{environment}
%
%    \begin{macrocode}
\endinput
%</%typ%>
%    \end{macrocode}
%\Finale
DTX

<<'README'
----------------------------------------------------------------
dtxgen --- generate template for LaTeX self-extracting .dtx file
Version: %VERSION%
Author:  Wybo Dekker
E-mail:  wybo@xs4all.nl
License: Released under the GNU General Public License
See:     http://www.gnu.org/copyleft/gpl.html
----------------------------------------------------------------

Short description:
dtxgen creates a template for a self-extracting .dtx file. It is useful for
those who plan to create a new Documented LaTeX Source (.dtx) file. 

The script takes some variables such as:
- name and email address of the author,
- a short description of the class or package generated from the .dtx file,
- a date
from environment variables, or from command line options and generates a
template for the .dtx file with some minimal examples. Of course, the user
will have to replace those examples with the real work.

Major changes of release %VERSION% relative to 1.00:
- dtx files contain only one version number
- presence of sed executable is tested
README

# $Id: dtxgen,v 1.6 2013/04/15 21:13:10 wybo Exp $