latexmk update (27may09)

git-svn-id: svn://tug.org/texlive/trunk@13499 c570f23f-e606-0410-a88d-b1316a301751

7 files changed, 478 insertions, 166 deletions

diff --git a/Build/source/texk/texlive/linked_scripts/latexmk/latexmk.pl b/Build/source/texk/texlive/linked_scripts/latexmk/latexmk.pl
index 1b122c7e975..7ae78471e4a 100755
--- a/Build/source/texk/texlive/linked_scripts/latexmk/latexmk.pl
+++ b/Build/source/texk/texlive/linked_scripts/latexmk/latexmk.pl
@@ -140,8 +140,8 @@ use warnings;
 
 $my_name = 'latexmk';
 $My_name = 'Latexmk';
-$version_num = '4.05b';
-$version_details = "$My_name, John Collins, 11 April 2009";
+$version_num = '4.07';
+$version_details = "$My_name, John Collins, 27 May 2009";
 
 
 use Config;
@@ -210,6 +210,18 @@ else {
 ##
 ##   Modification log for 24 Sep 2008 onwards in detail
 ##
+##     27 May 2009, John Collins  V. 4.07
+##     23 May 2009, John Collins  Try to work rationally when run of
+##                                    (pdf)latex does not produce
+##                                    output.  
+##                                Diagonostic when latex makes pdf or
+##                                    pdflatex makes dvi.
+##     28 Apr 2009, John Collins  Deal with case that file is written
+##                                    during run, but is not in database 
+##                                    before run.
+##     17 Apr 2009, John Collins  V. 4.06
+##     14 Apr 2009, John Collins  In parse_logB, clean up a bit more
+##                                    aggressively non-existent source files
 ##     11 Apr 2009, John Collins  Capture ctrl/C and ctrl/break during wait 
 ##                                   loop in preview_continuous.  Then 
 ##                                   control stays within latexmk on break
@@ -1648,10 +1660,11 @@ foreach $filename ( @file_list )
     if ( $cleanup_mode > 0 ) {
         # Use parse_logB to get names of generated files.
         # It returns its results in the following variables:
-        local %dependents = ();   # Maps files to status
+        local %dependents = ();    # Maps files to status
         local @bbl_files = ();
-        local %idx_files = ();    # Maps idx_file to (ind_file, base)
-        local %generated_log = ();    # Lists generated files
+        local %idx_files = ();     # Maps idx_file to (ind_file, base)
+        local %generated_log = (); # Lists generated files
+        local $primary_out = '';   # Actual output file (dvi or pdf)
         print "$My_name: Examining log file for generated files...\n";
         &parse_logB;
 
@@ -1798,7 +1811,7 @@ continue {
         if ( $failure_msg ) {
             #Remove trailing space
             $failure_msg =~ s/\s*$//;
-            warn "$My_name: Did not finish processing file: $failure_msg\n";
+            warn "$My_name: Did not finish processing file:\n   $failure_msg\n";
             $failure = 1;
         }
         $failure_count ++;
@@ -2404,9 +2417,7 @@ CHANGE:
   WAIT: while (1) {
            sleep($sleep_time);
 	   if ($have_break) { last WAIT; }
-           &rdb_clear_change_record;
-           rdb_recurseA( [@targets], \&rdb_flag_changes_here );
-           if ( &rdb_need_run ) { 
+           if ( rdb_have_changes(@targets) ) { 
   	       if (!$silent) {
                    warn "$My_name: Need to remake files.\n";
  	           &rdb_diagnose_changes( '  ' );
@@ -2424,7 +2435,7 @@ CHANGE:
      } # end WAIT:
      &default_break;
      if ($have_break) { 
-          print "$Latexmk: User typed ctrl/C or ctrl/break.  I'll stop.\n";
+          print "$My_name: User typed ctrl/C or ctrl/break.  I'll stop.\n";
           exit;
      }
      $waiting = 0; if ($diagnostics) { warn "NOT       WAITING\n"; }
@@ -2788,6 +2799,8 @@ sub parse_logB {
 #            There's no need to do a search.
 #      4 = definitive, which in this subroutine is only
 #          done for default dependents
+#      5 = Had a missing file line.  Now the file exists.
+#      6 = File was written during run.  (Overrides 5)
 # Treat the following specially, since they have special rules
 #   @bbl_files to list of .bbl files.
 #   %idx_files to map from .idx files to .ind files.
@@ -2814,6 +2827,9 @@ sub parse_logB {
     @bbl_files = ();
     %idx_files = ();    # Maps idx_file to (ind_file, base)
     %generated_log = ();
+    # $primary_out is actual output file (dvi or pdf)
+    # It is initialized before the call to this routine, to ensure
+    # a sensible default in case of misparsing
 
     $reference_changed = 0;
     $bad_reference = 0;
@@ -2891,8 +2907,15 @@ LINE:
 	    # Font info line
 	    next LINE;
 	}
-	if ( /^Output written on / ) {
-	    # Latex message
+	if (/^No pages of output\./) {
+            $primary_out = ''; 
+	    warn "$My_name: Log file says no output from latex\n";
+	    next LINE;
+	}
+	if ( /^Output written on\s+(.*)\s+\(\d+\s+page/ ) {
+            $primary_out = $1;
+	    warn "$My_name: Log file says output to '$1'\n"
+	       unless $silent;
 	    next LINE;
 	}
 	if ( /^Overfull / 
@@ -2990,11 +3013,6 @@ LINE:
 	if (/^\! LaTeX Error: / ) {
 	    next LINE;
 	}
-	if (/^No pages of output\./) {
-	    warn "$My_name: Log file says no output from latex\n"
-	       unless $silent;
-	    next LINE;
-	}
    INCLUDE_CANDIDATE:
         while ( /\((.*$)/ ) {
         # Filename found by
@@ -3129,7 +3147,15 @@ CANDIDATE:
     foreach my $candidate (keys %dependents) {
         my $code = $dependents{$candidate};
         if ( -e $candidate ) {
-	    $dependents{$candidate} = 4;
+            if ( exists $generated_log{$candidate} ){
+	        $dependents{$candidate} = 6;
+	    }
+            elsif ($code == 0) {
+	        $dependents{$candidate} = 5;
+	    }
+	    else {
+		$dependents{$candidate} = 4;
+	    }
 	}
 	elsif ($code == 1) {
             # Graphics file that is supposed to have been read.
@@ -3153,8 +3179,20 @@ CANDIDATE:
             #    which should include pathname if valid input file.
             # Name does not have pathname-characteristic character (hence
             #    $code==2.
-            # Candidate file does not exist with given name
+            # We get here if candidate file does not exist with given name
+            # Almost surely result of a misparsed line in log file.
+	    delete $dependents{$candidate};
+            push @misparse, $candidate;
+	}
+        elsif ($code == 3) {
+            # Candidate is from '(...' construct in log file, for input file
+            #    which should include pathname if valid input file.
+            # Name does have pathname-characteristic character (hence
+            #    $code==3.
+            # But we get here only if candidate file does not exist with 
+            # given name.  
             # Almost surely result of a misparsed line in log file.
+            # But with lower probability than $code == 2
 	    delete $dependents{$candidate};
             push @misparse, $candidate;
 	}
@@ -3187,7 +3225,11 @@ CANDIDATE:
               "$exist exist, $not_found were not found,\n",
 	      "   and $missing appear not to exist.\n";
         print "Dependents:\n";
-        foreach (@dependents) { print "   $_\n"; }
+        foreach (@dependents) { 
+            print "   '$_' "; 
+            if ( $dependents{$_} == 6 ) { print " written by (pdf)latex";}
+	    print "\n";
+        }
         if ($not_found > 0) {
 	    print "Not found:\n";
 	    foreach (@not_found) { print "   $_\n"; }
@@ -3206,13 +3248,7 @@ CANDIDATE:
             print "Apparent input files apparently from misunderstood lines in .log file:\n";
             foreach ( @misparse ) { print "   $_\n"; }
         }
-        print "Log file shows the following generated files: ";
-        foreach (keys %generated_log) {
-	    print "'$_' ";
-        }
-        print "\n";
     }
-
     return 1;
 } #END parse_logB
 
@@ -3683,12 +3719,36 @@ sub rdb_set_from_logB {
     local @bbl_files = ();
     local %idx_files = ();     # Maps idx_file to (ind_file, base)
     local %generated_log = (); # Lists generated files found in log file
+    local $primary_out = $$Pdest;  # output file (dvi or pdf)
 
     # The following are also returned, but are global, to be used by caller
     # $reference_changed, $bad_reference $bad_citation
 
     &parse_logB;
 
+    # Handle result on output file:
+    #   1.  Non-existent output file, which is because of no content.
+    #         This could either be because the source file has genuinely
+    #         no content, or because of a missing input file.  Since a
+    #         missing input file might be correctable by a run of some
+    #         other program whose running is provoked AFTER a run of
+    #         (pdf)latex, we'll set a diagnostic and leave it to the
+    #         rdb_makeB to handle after all circular dependencies are
+    #         resolved. 
+    #   2.  The output file might be of a different kind than expected
+    #         (i.e., dvi instead of pdf, or vv).  This could
+    #         legitimately occur when the source file (or an invoked
+    #         package or class) sets \pdfoutput. 
+    $missing_dvi_pdf = ''; 
+    if ($primary_out eq '')  {
+        warn "$My_name: For rule '$rule', no output was made\n";
+        $missing_dvi_pdf = $$Pdest;
+    }
+    elsif ($primary_out ne $$Pdest) {
+        warn "$My_name: ===For rule '$rule', actual output '$primary_out'\n",
+             "       ======appears not to match expected output '$$Pdest'\n";
+    }
+
   IDX_FILE:
     foreach my $idx_file ( keys %idx_files ) {
 	my ($ind_file, $ind_base) = @{$idx_files{$idx_file}};
@@ -3742,7 +3802,25 @@ NEW_SOURCE:
     foreach my $new_source (keys %dependents) {
         print "  ===Source file for rule '$rule': '$new_source'\n"
 	    if ($diagnostics);
-        rdb_ensure_file( $rule, $new_source );
+	if ( ($dependents{$new_source} == 5) 
+             || ($dependents{$new_source} == 6) ) {
+            # (a) File was detected in "No file..." line in log file. 
+            #     Typically file was searched for early in run of 
+            #     latex/pdflatex, was not found, and then was written 
+            #     later in run.
+            # or (b) File was written during run. 
+            # In both cases, if file doesn't already exist in database, we 
+            #    don't know its previous status.  Therefore we tell 
+            #    rdb_ensure_file that if it needs to add the file to its 
+            #    database, then the previous version of the file should be 
+            #    treated as non-existent, to ensure another run is forced.
+            rdb_ensure_file( $rule, $new_source, undef, 1 );
+	}
+	else {
+            # But we don't need this precaution for ordinary user files (or 
+            #    for files that are generated outside of latex/pdflatex). 
+            rdb_ensure_file( $rule, $new_source );
+	}
     }
 
     my @more_sources = &rdb_set_dependentsA( $rule );
@@ -4250,6 +4328,7 @@ sub rdb_makeB {
 
     local %pass = ();
     local $failure = 0;        # General accumulated error flag
+    local $missing_dvi_pdf = ''; # Did primary run fail to make its output file? 
     local $runs = 0;
     local $too_many_runs = 0;
     local %rules_applied = ();
@@ -4273,7 +4352,6 @@ sub rdb_makeB {
                 print "MakeB: doing pre_primary and primary...\n";
             }
             rdb_for_some( [@pre_primary, $primary], \&rdb_makeB1 );
-
             if ( ($runs > 0) && ! $too_many_runs ) {
                 $retry_msg = 0;
                 if ( $failure && $newrule_nofile ) { 
@@ -4293,6 +4371,12 @@ sub rdb_makeB {
                     print "But in fact no new files made\n";
 		}
 	    }
+            if ( $missing_dvi_pdf ) { 
+               # No output from primary, after completing circular dependence
+               warn "Failure to make '$missing_dvi_pdf'\n";
+               $failure = 1; 
+               last PASS;
+            }    
             if ($failure && !$force_mode ) { last PASS; }
 	    if ($diagnostics) {
   	        print "MakeB: doing post_primary...\n";
@@ -4350,15 +4434,46 @@ sub rdb_makeB1 {
     # up-to-date. 
     if ($diagnostics) { print "  MakeB1 $rule\n"; }
     if ($failure & ! $force_mode) {return;}
+    if ( ! defined $pass{$rule} ) {$pass{$rule} = 0; } 
     &rdb_clear_change_record;
     if ( ($$Prun_time == 0) && exists($possible_primaries{$rule}) ) {
         push @rules_never_run, $rule;
         $$Pout_of_date = 1;
     }
     else {
-        &rdb_flag_changes_here;
+        if ( $$Pdest && (! -e $$Pdest) ) {
+	    # With a non-existent desintation, if we haven't made any passes
+            #   through a rule, rerunning the rule is good, because the file
+            #   may fail to exist because of being deleted by the user (for ex.)
+            #   rather than because of a failure on a previous run. 
+            # (We could do better with a flag in fdb file.)
+	    # But after the first pass, the situation is different.  
+	    #   For a primary rule (pdf)latex, the lack of a destination file 
+	    #      could result from there being zero content due to a missing
+	    #      essential input file.  The input file could be generated 
+	    #      by a program to be run later (e.g., a cusdep or bibtex), 
+	    #      so we should wait until all passes are completed before 
+            #      deciding a non-existent destination file is an error.
+	    #   For a custom dependency, the rule may be obsolete, and
+	    #      if the source file does not exist also, we should simply
+	    #      not run the rule, but not set an error condition.
+	    #      Any error will arise at the (pdf)latex level due to a 
+	    #      missing source file at that level.
+	    if ( ( $$Pcmd_type eq 'cusdep') && $$Psource && (! -e $$Psource) ) {
+		# No action
+	    }
+	    elsif ( $pass{$rule}==0) {
+		push @no_dest, $$Pdest;
+		$$Pout_of_date = 1;
+	    }
+	    if ( $$Pcmd_type eq 'primary' ) {
+		$missing_dvi_pdf = $$Pdest;
+	    }
+	}
     }
 
+    &rdb_flag_changes_here;
+
     if (!$$Pout_of_date) {
 #??	if ( ($$Pcmd_type eq 'primary') && (! $silent) ) {
 #            print "Rule '$rule' up to date\n";
@@ -4368,7 +4483,7 @@ sub rdb_makeB1 {
     if ($diagnostics) { print "     remake\n"; }
     if (!$silent) { 
         print "$My_name: applying rule '$rule'...\n"; 
-        &rdb_diagnose_changes( "Rule '$rule': ");
+        &rdb_diagnose_changes( "Rule '$rule': " );
     }
     $rules_applied{$rule} = 1;
     $runs++;
@@ -4403,12 +4518,10 @@ sub rdb_makeB1 {
     }
     elsif ( $$Pdest && ( !-e $$Pdest ) && (! $failure) ){
         # If there is a destination to make, but for some reason
-        #    it did not get made, then make sure a failure gets reported.
-        # But if the failure has already been reported, there's no need
-        #    to report here, since that would give a generic error
-        #    message instead of a specific one.
-
-## ??? 1 Sep. 2008, for cusdep no-file-exists issue
+        #    it did not get made, and no other error was reported, 
+        #    then a priori there appears to be an error condition:
+        #    the run failed.   But there are two important cases in
+        #    which this is a wrong diagnosis.
         if ( ( $$Pcmd_type eq 'cusdep') && $$Psource && (! -e $$Psource) ) {
             # However, if the rule is a custom dependency, this is not by
             #  itself an error, if also the source file does not exist.  In 
@@ -4421,12 +4534,21 @@ sub rdb_makeB1 {
             # So in this case, do NOT report an error          
             $$Pout_of_date = 0;
 	}
+        elsif ($$Pcmd_type eq 'primary' ) { 
+            # For a primary rule, i.e., (pdf)latex, not to produce the 
+            #    expected output file may not be an error condition.  
+            # Diagnostics were handled in parsing the log file.
+            # Special action in main loop inrdb_makeB1
+            $missing_dvi_pdf = $$Pdest;
+        }
 	else {
             $failure = 1;
-	    $failure_msg = "'$rule' did not make '$$Pdest'";
 	}
     }
-    if ($return != 0) {$failure = 1;}
+    if ($return != 0) {
+        $failure = 1; 
+        $failure_msg = "Run of rule '$rule' gave a non-zero error code";
+    }
 }  #END rdb_makeB1
 
 #************************************************************
@@ -4677,6 +4799,7 @@ sub rdb_primary_run {
     my $return = 0;
 
     my $return_latex = &rdb_run1;
+    if (-e $$Pdest) { $missing_dvi_pdf = '';}
 
     ######### Analyze results of run:
     if ( ! -e "$root_filename.log" ) {
@@ -4705,6 +4828,9 @@ sub rdb_primary_run {
     my $submake_return = &rdb_submakeB;
     &rdb_clear_change_record;
     &rdb_flag_changes_here;
+    if ($$Pout_of_date && !$silent) { 
+        &rdb_diagnose_changes( "Rule '$rule': " );
+    }
     $updated = 1;    # Flag that some dependent file has been remade
     # Fix the state of the files as of now: this will solve the
     # problem of latex and pdflatex interfering with each other,
@@ -4744,7 +4870,7 @@ sub rdb_clear_change_record {
     # Initialize diagnostics for reasons for running rule.
     @changed = ();
     @disappeared = ();
-    @no_dest = ();
+    @no_dest = ();          # We are not now using this
     @rules_never_run = ();
     @rules_to_apply = ();   # This is used in recursive application
                             # of rdb_flag_changes_here, to list
@@ -4759,24 +4885,6 @@ sub rdb_flag_changes_here {
     local $dest_mtime = 0;
     $dest_mtime = get_mtime($$Pdest) if ($$Pdest);
     rdb_do_files( \&rdb_file_change1);
-    if ( $$Pdest && (! -e $$Pdest) ) {
-## ??? 1 Sep. 2008, for cusdep no-file-exists issue
-        if ( ( $$Pcmd_type eq 'cusdep') && $$Psource && (! -e $$Psource) ) {
-            # However, if the rule is a custom dependency, this is not by
-            #  itself an error, if also the source file does not exist.  In 
-            #  that case, we may have the situation that (1) the dest file is no
-            #  longer needed by the tex file, and (2) therefore the user
-            #  has deleted the source and dest files.  After the next
-            #  latex run and the consequent analysis of the log file, the
-            #  cusdep rule will no longer be needed, and will be removed.
-
-            # So in this case, do NOT report an error          
-	}
-	else {
-            $$Pout_of_date = 1;
-            push @no_dest, $$Pdest;
-	}
-    }
     if ($$Pout_of_date) {
 	push @rules_to_apply, $rule;
     }
@@ -4834,9 +4942,11 @@ sub rdb_file_change1 {
 
 #************************************************************
 
-sub rdb_need_run {
+sub rdb_have_changes {
+    &rdb_clear_change_record;
+    rdb_recurseA( [@_], \&rdb_flag_changes_here );
     return ($#changed >= 0) || ($#no_dest >= 0) || ($#rules_to_apply >= 0);
-} #END rdb_need_run
+} #END rdb_have_changes
 
 #************************************************************
 
@@ -5208,23 +5318,35 @@ sub rdb_create_rule {
 #************************************************************
 
 sub rdb_ensure_file {
-    # rdb_ensure_file( rule, file[, fromrule] )
+    # rdb_ensure_file( rule, file[, fromrule[, set_not_exists]] )
     # Ensures the source file item exists in the given rule.
-    # Initialize to current file state if the item is created.
     # Then if the fromrule is specified, set it for the file item.
+    # If the item is created, then:
+    #    (a) by default initialize it to current file state.
+    #    (b) but if the fourth argument, set_not_exists, is true, 
+    #        initialize the item as if the file does not exist.
+    #        This case is typically used when the log file for a run
+    #        of latex/pdflatex claims that the file was non-existent
+    #        at the beginning of a run. 
 #============ rule and file data set here ======================================
     my $rule = shift;
-    local ( $new_file, $new_from_rule ) = @_;
+    local ( $new_file, $new_from_rule, $set_not_exists ) = @_;
     if ( ! rdb_rule_exists( $rule ) ) {
 	die_trace( "$My_name: BUG in rdb_ensure_file: non-existent rule '$rule'" );
     }
     if ( ! defined $new_file ) {
 	die_trace( "$My_name: BUG in rdb_ensure_file: undefined file for '$rule'" );
     }
+    if ( ! defined $set_not_exists ) { $set_not_exists = 0; }
     rdb_one_rule( $rule, 
                   sub{
                       if (! exists ${$PHsource}{$new_file} ) {
-                          ${$PHsource}{$new_file} = [fdb_get($new_file), '', 0];
+  		          if ( $set_not_exists ) {
+                              ${$PHsource}{$new_file} = [0, -1, 0, '', 0];
+		          }
+		          else {
+                              ${$PHsource}{$new_file} = [fdb_get($new_file), '', 0];
+               	          }
 		      }
 		  }
     );
@@ -6273,7 +6395,6 @@ sub finish_dir_stack {
 
 sub end_wait {
     #  Handler for break: Set global variable $have_break to 1.
-    $signal = shift;
     # Some systems (e.g., MSWin reset) appear to reset the handler.
     # So I'll re-enable it
     &catch_break;
diff --git a/Master/texmf-dist/doc/support/latexmk/CHANGES b/Master/texmf-dist/doc/support/latexmk/CHANGES
index b4b4422f3e5..fc5d7b3167d 100644
--- a/Master/texmf-dist/doc/support/latexmk/CHANGES
+++ b/Master/texmf-dist/doc/support/latexmk/CHANGES
@@ -69,3 +69,13 @@ From v. 4.01 to v. 4.05
    Change to a nicer #! line
    Safer use of % in placeholders in commands
 
+From v. 4.05 to v. 4.07
+   In preview-continuous mode, arrange that ctrl/C used to stop the
+      processing loop does not automatically kill a script used to
+      call latexmk
+   Better handling of situation when a run of (pdf)latex does not
+      produce a dvi or pdf file, or when the opposite type of output
+      is produced than expected (e.g., pdf instead of dvi by latex)
+   Deal better with case that file is written and read by (pdf)latex
+      during a run
+
diff --git a/Master/texmf-dist/doc/support/latexmk/README b/Master/texmf-dist/doc/support/latexmk/README
index c6dd361df1e..2f80b235e9a 100644
--- a/Master/texmf-dist/doc/support/latexmk/README
+++ b/Master/texmf-dist/doc/support/latexmk/README
@@ -1,4 +1,4 @@
-Hi, and thanks for checking out latexmk. (Version 4.05, 10 April 2009)
+Hi, and thanks for checking out latexmk. (Version 4.07, 27 May 2009)
 
 Latexmk completely automates the process of generating a LaTeX document.
 Essentially, it is a highly specialized cousin of the general make
@@ -88,7 +88,7 @@ I hope you find this useful.
 
 John Collins
 ---------------------------- "latexmk -h" ----------------------------
-Latexmk 4.05b: Automatic LaTeX document generation routine
+Latexmk 4.07: Automatic LaTeX document generation routine
 
 Usage: latexmk [latexmk_options] [filename ...]
 
diff --git a/Master/texmf-dist/doc/support/latexmk/latexmk.1 b/Master/texmf-dist/doc/support/latexmk/latexmk.1
index ec5c9245afa..7ed711e8397 100644
--- a/Master/texmf-dist/doc/support/latexmk/latexmk.1
+++ b/Master/texmf-dist/doc/support/latexmk/latexmk.1
@@ -1,4 +1,4 @@
-.TH LATEXMK 1L "10 April 2009" ""
+.TH LATEXMK 1L "27 May 2009" ""
 .SH NAME
 latexmk \- generate LaTeX document
 .SH SYNOPSIS
@@ -1574,7 +1574,7 @@ e-mail addresses are not written in their standard form to avoid being
 harvested by worms and viruses.)
 .SH AUTHOR
 Current version, by John Collins (username collins at node phys.psu.edu).
-(Version 4.05a).
+(Version 4.07).
 
 Released version can be obtained from CTAN:
 <http://www.tug.org/tex-archive/support/latexmk/>, and from the
diff --git a/Master/texmf-dist/doc/support/latexmk/latexmk.pdf b/Master/texmf-dist/doc/support/latexmk/latexmk.pdf
index 2fd1f26f1fc..fa94b34f8ff 100644
--- a/Master/texmf-dist/doc/support/latexmk/latexmk.pdf
+++ b/Master/texmf-dist/doc/support/latexmk/latexmk.pdf
diff --git a/Master/texmf-dist/doc/support/latexmk/latexmk.txt b/Master/texmf-dist/doc/support/latexmk/latexmk.txt
index 3c6e7197147..0d82b1a44da 100644
--- a/Master/texmf-dist/doc/support/latexmk/latexmk.txt
+++ b/Master/texmf-dist/doc/support/latexmk/latexmk.txt
@@ -127,7 +127,7 @@ LATEXMK OPTIONS AND ARGUMENTS ON COMMAND LINE
 
 
 
-                                 10 April 2009                               2
+                                  27 May 2009                                2
 
 
 
@@ -194,7 +194,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                               3
+                                  27 May 2009                                3
 
 
 
@@ -261,7 +261,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                               4
+                                  27 May 2009                                4
 
 
 
@@ -328,7 +328,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                               5
+                                  27 May 2009                                5
 
 
 
@@ -395,7 +395,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                               6
+                                  27 May 2009                                6
 
 
 
@@ -462,7 +462,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                               7
+                                  27 May 2009                                7
 
 
 
@@ -529,7 +529,7 @@ EXAMPLES
 
 
 
-                                 10 April 2009                               8
+                                  27 May 2009                                8
 
 
 
@@ -596,7 +596,7 @@ HOW TO SET VARIABLES IN INITIALIZATION FILES
 
 
 
-                                 10 April 2009                               9
+                                  27 May 2009                                9
 
 
 
@@ -664,7 +664,7 @@ FORMAT OF COMMAND SPECIFICATIONS
 
 
 
-                                 10 April 2009                              10
+                                  27 May 2009                               10
 
 
 
@@ -732,7 +732,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              11
+                                  27 May 2009                               11
 
 
 
@@ -800,7 +800,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              12
+                                  27 May 2009                               12
 
 
 
@@ -868,7 +868,7 @@ LIST OF CONFIGURATION VARIABLES USABLE IN INITIALIZATION FILES
 
 
 
-                                 10 April 2009                              13
+                                  27 May 2009                               13
 
 
 
@@ -936,7 +936,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              14
+                                  27 May 2009                               14
 
 
 
@@ -1006,7 +1006,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              15
+                                  27 May 2009                               15
 
 
 
@@ -1076,7 +1076,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              16
+                                  27 May 2009                               16
 
 
 
@@ -1146,7 +1146,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              17
+                                  27 May 2009                               17
 
 
 
@@ -1216,7 +1216,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              18
+                                  27 May 2009                               18
 
 
 
@@ -1286,7 +1286,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              19
+                                  27 May 2009                               19
 
 
 
@@ -1356,7 +1356,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              20
+                                  27 May 2009                               20
 
 
 
@@ -1427,7 +1427,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              21
+                                  27 May 2009                               21
 
 
 
@@ -1498,7 +1498,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              22
+                                  27 May 2009                               22
 
 
 
@@ -1569,7 +1569,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              23
+                                  27 May 2009                               23
 
 
 
@@ -1640,7 +1640,7 @@ CUSTOM DEPENDENCIES
 
 
 
-                                 10 April 2009                              24
+                                  27 May 2009                               24
 
 
 
@@ -1711,7 +1711,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              25
+                                  27 May 2009                               25
 
 
 
@@ -1782,7 +1782,7 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              26
+                                  27 May 2009                               26
 
 
 
@@ -1851,11 +1851,11 @@ THANKS TO
 
 AUTHOR
        Current  version,  by  John   Collins   (username   collins   at   node
-       phys.psu.edu).  (Version 4.05a).
+       phys.psu.edu).  (Version 4.07).
 
 
 
-                                 10 April 2009                              27
+                                  27 May 2009                               27
 
 
 
@@ -1928,6 +1928,6 @@ LATEXMK(1L)                                                        LATEXMK(1L)
 
 
 
-                                 10 April 2009                              28
+                                  27 May 2009                               28
 
 
diff --git a/Master/texmf-dist/scripts/latexmk/latexmk.pl b/Master/texmf-dist/scripts/latexmk/latexmk.pl
index 9e7beb249a1..7ae78471e4a 100755
--- a/Master/texmf-dist/scripts/latexmk/latexmk.pl
+++ b/Master/texmf-dist/scripts/latexmk/latexmk.pl
@@ -140,8 +140,8 @@ use warnings;
 
 $my_name = 'latexmk';
 $My_name = 'Latexmk';
-$version_num = '4.05';
-$version_details = "$My_name, John Collins, 10 April 2009";
+$version_num = '4.07';
+$version_details = "$My_name, John Collins, 27 May 2009";
 
 
 use Config;
@@ -210,6 +210,25 @@ else {
 ##
 ##   Modification log for 24 Sep 2008 onwards in detail
 ##
+##     27 May 2009, John Collins  V. 4.07
+##     23 May 2009, John Collins  Try to work rationally when run of
+##                                    (pdf)latex does not produce
+##                                    output.  
+##                                Diagonostic when latex makes pdf or
+##                                    pdflatex makes dvi.
+##     28 Apr 2009, John Collins  Deal with case that file is written
+##                                    during run, but is not in database 
+##                                    before run.
+##     17 Apr 2009, John Collins  V. 4.06
+##     14 Apr 2009, John Collins  In parse_logB, clean up a bit more
+##                                    aggressively non-existent source files
+##     11 Apr 2009, John Collins  Capture ctrl/C and ctrl/break during wait 
+##                                   loop in preview_continuous.  Then 
+##                                   control stays within latexmk on break
+##                                   from loop.  It allows user to do 
+##                                   postprocessing, like
+##                                   "latexmk -pvc file; cleanup;"
+##     10 Apr 2009, John Collins  Safer use of % in placeholders in commands
 ##     10 Apr 2009, John Collins  V. 4.05
 ##      3 Apr 2009, John Collins  Change to a nicer #! line
 ##     26 Mar 2009, John Collins  Case independence for one item in 
@@ -1641,10 +1660,11 @@ foreach $filename ( @file_list )
     if ( $cleanup_mode > 0 ) {
         # Use parse_logB to get names of generated files.
         # It returns its results in the following variables:
-        local %dependents = ();   # Maps files to status
+        local %dependents = ();    # Maps files to status
         local @bbl_files = ();
-        local %idx_files = ();    # Maps idx_file to (ind_file, base)
-        local %generated_log = ();    # Lists generated files
+        local %idx_files = ();     # Maps idx_file to (ind_file, base)
+        local %generated_log = (); # Lists generated files
+        local $primary_out = '';   # Actual output file (dvi or pdf)
         print "$My_name: Examining log file for generated files...\n";
         &parse_logB;
 
@@ -1791,7 +1811,7 @@ continue {
         if ( $failure_msg ) {
             #Remove trailing space
             $failure_msg =~ s/\s*$//;
-            warn "$My_name: Did not finish processing file: $failure_msg\n";
+            warn "$My_name: Did not finish processing file:\n   $failure_msg\n";
             $failure = 1;
         }
         $failure_count ++;
@@ -2392,11 +2412,12 @@ CHANGE:
           print "\n=== Watching for updated files. Use ctrl/C to stop ...\n";
        }
        $waiting = 1; if ($diagnostics) { warn "WAITING\n"; }
+       &catch_break;
+       $have_break = 0;
   WAIT: while (1) {
            sleep($sleep_time);
-           &rdb_clear_change_record;
-           rdb_recurseA( [@targets], \&rdb_flag_changes_here );
-           if ( &rdb_need_run ) { 
+	   if ($have_break) { last WAIT; }
+           if ( rdb_have_changes(@targets) ) { 
   	       if (!$silent) {
                    warn "$My_name: Need to remake files.\n";
  	           &rdb_diagnose_changes( '  ' );
@@ -2410,8 +2431,14 @@ CHANGE:
 	       warn "$My_name: New file(s) found.\n";
                last WAIT; 
 	   }
+	   if ($have_break) { last WAIT; }
      } # end WAIT:
-    $waiting = 0; if ($diagnostics) { warn "NOT       WAITING\n"; }
+     &default_break;
+     if ($have_break) { 
+          print "$My_name: User typed ctrl/C or ctrl/break.  I'll stop.\n";
+          exit;
+     }
+     $waiting = 0; if ($diagnostics) { warn "NOT       WAITING\n"; }
   } #end infinite_loop CHANGE:
 } #END sub make_preview_continuousB
 
@@ -2772,6 +2799,8 @@ sub parse_logB {
 #            There's no need to do a search.
 #      4 = definitive, which in this subroutine is only
 #          done for default dependents
+#      5 = Had a missing file line.  Now the file exists.
+#      6 = File was written during run.  (Overrides 5)
 # Treat the following specially, since they have special rules
 #   @bbl_files to list of .bbl files.
 #   %idx_files to map from .idx files to .ind files.
@@ -2798,6 +2827,9 @@ sub parse_logB {
     @bbl_files = ();
     %idx_files = ();    # Maps idx_file to (ind_file, base)
     %generated_log = ();
+    # $primary_out is actual output file (dvi or pdf)
+    # It is initialized before the call to this routine, to ensure
+    # a sensible default in case of misparsing
 
     $reference_changed = 0;
     $bad_reference = 0;
@@ -2875,8 +2907,15 @@ LINE:
 	    # Font info line
 	    next LINE;
 	}
-	if ( /^Output written on / ) {
-	    # Latex message
+	if (/^No pages of output\./) {
+            $primary_out = ''; 
+	    warn "$My_name: Log file says no output from latex\n";
+	    next LINE;
+	}
+	if ( /^Output written on\s+(.*)\s+\(\d+\s+page/ ) {
+            $primary_out = $1;
+	    warn "$My_name: Log file says output to '$1'\n"
+	       unless $silent;
 	    next LINE;
 	}
 	if ( /^Overfull / 
@@ -2974,11 +3013,6 @@ LINE:
 	if (/^\! LaTeX Error: / ) {
 	    next LINE;
 	}
-	if (/^No pages of output\./) {
-	    warn "$My_name: Log file says no output from latex\n"
-	       unless $silent;
-	    next LINE;
-	}
    INCLUDE_CANDIDATE:
         while ( /\((.*$)/ ) {
         # Filename found by
@@ -3113,7 +3147,15 @@ CANDIDATE:
     foreach my $candidate (keys %dependents) {
         my $code = $dependents{$candidate};
         if ( -e $candidate ) {
-	    $dependents{$candidate} = 4;
+            if ( exists $generated_log{$candidate} ){
+	        $dependents{$candidate} = 6;
+	    }
+            elsif ($code == 0) {
+	        $dependents{$candidate} = 5;
+	    }
+	    else {
+		$dependents{$candidate} = 4;
+	    }
 	}
 	elsif ($code == 1) {
             # Graphics file that is supposed to have been read.
@@ -3137,11 +3179,23 @@ CANDIDATE:
             #    which should include pathname if valid input file.
             # Name does not have pathname-characteristic character (hence
             #    $code==2.
-            # Candidate file does not exist with given name
+            # We get here if candidate file does not exist with given name
             # Almost surely result of a misparsed line in log file.
 	    delete $dependents{$candidate};
             push @misparse, $candidate;
 	}
+        elsif ($code == 3) {
+            # Candidate is from '(...' construct in log file, for input file
+            #    which should include pathname if valid input file.
+            # Name does have pathname-characteristic character (hence
+            #    $code==3.
+            # But we get here only if candidate file does not exist with 
+            # given name.  
+            # Almost surely result of a misparsed line in log file.
+            # But with lower probability than $code == 2
+	    delete $dependents{$candidate};
+            push @misparse, $candidate;
+	}
 	elsif ($code == 0) {
             my ($base, $path, $ext) = fileparseA($candidate);
             $ext =~ s/^\.//;
@@ -3171,7 +3225,11 @@ CANDIDATE:
               "$exist exist, $not_found were not found,\n",
 	      "   and $missing appear not to exist.\n";
         print "Dependents:\n";
-        foreach (@dependents) { print "   $_\n"; }
+        foreach (@dependents) { 
+            print "   '$_' "; 
+            if ( $dependents{$_} == 6 ) { print " written by (pdf)latex";}
+	    print "\n";
+        }
         if ($not_found > 0) {
 	    print "Not found:\n";
 	    foreach (@not_found) { print "   $_\n"; }
@@ -3190,13 +3248,7 @@ CANDIDATE:
             print "Apparent input files apparently from misunderstood lines in .log file:\n";
             foreach ( @misparse ) { print "   $_\n"; }
         }
-        print "Log file shows the following generated files: ";
-        foreach (keys %generated_log) {
-	    print "'$_' ";
-        }
-        print "\n";
     }
-
     return 1;
 } #END parse_logB
 
@@ -3667,12 +3719,36 @@ sub rdb_set_from_logB {
     local @bbl_files = ();
     local %idx_files = ();     # Maps idx_file to (ind_file, base)
     local %generated_log = (); # Lists generated files found in log file
+    local $primary_out = $$Pdest;  # output file (dvi or pdf)
 
     # The following are also returned, but are global, to be used by caller
     # $reference_changed, $bad_reference $bad_citation
 
     &parse_logB;
 
+    # Handle result on output file:
+    #   1.  Non-existent output file, which is because of no content.
+    #         This could either be because the source file has genuinely
+    #         no content, or because of a missing input file.  Since a
+    #         missing input file might be correctable by a run of some
+    #         other program whose running is provoked AFTER a run of
+    #         (pdf)latex, we'll set a diagnostic and leave it to the
+    #         rdb_makeB to handle after all circular dependencies are
+    #         resolved. 
+    #   2.  The output file might be of a different kind than expected
+    #         (i.e., dvi instead of pdf, or vv).  This could
+    #         legitimately occur when the source file (or an invoked
+    #         package or class) sets \pdfoutput. 
+    $missing_dvi_pdf = ''; 
+    if ($primary_out eq '')  {
+        warn "$My_name: For rule '$rule', no output was made\n";
+        $missing_dvi_pdf = $$Pdest;
+    }
+    elsif ($primary_out ne $$Pdest) {
+        warn "$My_name: ===For rule '$rule', actual output '$primary_out'\n",
+             "       ======appears not to match expected output '$$Pdest'\n";
+    }
+
   IDX_FILE:
     foreach my $idx_file ( keys %idx_files ) {
 	my ($ind_file, $ind_base) = @{$idx_files{$idx_file}};
@@ -3726,7 +3802,25 @@ NEW_SOURCE:
     foreach my $new_source (keys %dependents) {
         print "  ===Source file for rule '$rule': '$new_source'\n"
 	    if ($diagnostics);
-        rdb_ensure_file( $rule, $new_source );
+	if ( ($dependents{$new_source} == 5) 
+             || ($dependents{$new_source} == 6) ) {
+            # (a) File was detected in "No file..." line in log file. 
+            #     Typically file was searched for early in run of 
+            #     latex/pdflatex, was not found, and then was written 
+            #     later in run.
+            # or (b) File was written during run. 
+            # In both cases, if file doesn't already exist in database, we 
+            #    don't know its previous status.  Therefore we tell 
+            #    rdb_ensure_file that if it needs to add the file to its 
+            #    database, then the previous version of the file should be 
+            #    treated as non-existent, to ensure another run is forced.
+            rdb_ensure_file( $rule, $new_source, undef, 1 );
+	}
+	else {
+            # But we don't need this precaution for ordinary user files (or 
+            #    for files that are generated outside of latex/pdflatex). 
+            rdb_ensure_file( $rule, $new_source );
+	}
     }
 
     my @more_sources = &rdb_set_dependentsA( $rule );
@@ -4234,6 +4328,7 @@ sub rdb_makeB {
 
     local %pass = ();
     local $failure = 0;        # General accumulated error flag
+    local $missing_dvi_pdf = ''; # Did primary run fail to make its output file? 
     local $runs = 0;
     local $too_many_runs = 0;
     local %rules_applied = ();
@@ -4257,7 +4352,6 @@ sub rdb_makeB {
                 print "MakeB: doing pre_primary and primary...\n";
             }
             rdb_for_some( [@pre_primary, $primary], \&rdb_makeB1 );
-
             if ( ($runs > 0) && ! $too_many_runs ) {
                 $retry_msg = 0;
                 if ( $failure && $newrule_nofile ) { 
@@ -4277,6 +4371,12 @@ sub rdb_makeB {
                     print "But in fact no new files made\n";
 		}
 	    }
+            if ( $missing_dvi_pdf ) { 
+               # No output from primary, after completing circular dependence
+               warn "Failure to make '$missing_dvi_pdf'\n";
+               $failure = 1; 
+               last PASS;
+            }    
             if ($failure && !$force_mode ) { last PASS; }
 	    if ($diagnostics) {
   	        print "MakeB: doing post_primary...\n";
@@ -4334,15 +4434,46 @@ sub rdb_makeB1 {
     # up-to-date. 
     if ($diagnostics) { print "  MakeB1 $rule\n"; }
     if ($failure & ! $force_mode) {return;}
+    if ( ! defined $pass{$rule} ) {$pass{$rule} = 0; } 
     &rdb_clear_change_record;
     if ( ($$Prun_time == 0) && exists($possible_primaries{$rule}) ) {
         push @rules_never_run, $rule;
         $$Pout_of_date = 1;
     }
     else {
-        &rdb_flag_changes_here;
+        if ( $$Pdest && (! -e $$Pdest) ) {
+	    # With a non-existent desintation, if we haven't made any passes
+            #   through a rule, rerunning the rule is good, because the file
+            #   may fail to exist because of being deleted by the user (for ex.)
+            #   rather than because of a failure on a previous run. 
+            # (We could do better with a flag in fdb file.)
+	    # But after the first pass, the situation is different.  
+	    #   For a primary rule (pdf)latex, the lack of a destination file 
+	    #      could result from there being zero content due to a missing
+	    #      essential input file.  The input file could be generated 
+	    #      by a program to be run later (e.g., a cusdep or bibtex), 
+	    #      so we should wait until all passes are completed before 
+            #      deciding a non-existent destination file is an error.
+	    #   For a custom dependency, the rule may be obsolete, and
+	    #      if the source file does not exist also, we should simply
+	    #      not run the rule, but not set an error condition.
+	    #      Any error will arise at the (pdf)latex level due to a 
+	    #      missing source file at that level.
+	    if ( ( $$Pcmd_type eq 'cusdep') && $$Psource && (! -e $$Psource) ) {
+		# No action
+	    }
+	    elsif ( $pass{$rule}==0) {
+		push @no_dest, $$Pdest;
+		$$Pout_of_date = 1;
+	    }
+	    if ( $$Pcmd_type eq 'primary' ) {
+		$missing_dvi_pdf = $$Pdest;
+	    }
+	}
     }
 
+    &rdb_flag_changes_here;
+
     if (!$$Pout_of_date) {
 #??	if ( ($$Pcmd_type eq 'primary') && (! $silent) ) {
 #            print "Rule '$rule' up to date\n";
@@ -4352,7 +4483,7 @@ sub rdb_makeB1 {
     if ($diagnostics) { print "     remake\n"; }
     if (!$silent) { 
         print "$My_name: applying rule '$rule'...\n"; 
-        &rdb_diagnose_changes( "Rule '$rule': ");
+        &rdb_diagnose_changes( "Rule '$rule': " );
     }
     $rules_applied{$rule} = 1;
     $runs++;
@@ -4387,12 +4518,10 @@ sub rdb_makeB1 {
     }
     elsif ( $$Pdest && ( !-e $$Pdest ) && (! $failure) ){
         # If there is a destination to make, but for some reason
-        #    it did not get made, then make sure a failure gets reported.
-        # But if the failure has already been reported, there's no need
-        #    to report here, since that would give a generic error
-        #    message instead of a specific one.
-
-## ??? 1 Sep. 2008, for cusdep no-file-exists issue
+        #    it did not get made, and no other error was reported, 
+        #    then a priori there appears to be an error condition:
+        #    the run failed.   But there are two important cases in
+        #    which this is a wrong diagnosis.
         if ( ( $$Pcmd_type eq 'cusdep') && $$Psource && (! -e $$Psource) ) {
             # However, if the rule is a custom dependency, this is not by
             #  itself an error, if also the source file does not exist.  In 
@@ -4405,12 +4534,21 @@ sub rdb_makeB1 {
             # So in this case, do NOT report an error          
             $$Pout_of_date = 0;
 	}
+        elsif ($$Pcmd_type eq 'primary' ) { 
+            # For a primary rule, i.e., (pdf)latex, not to produce the 
+            #    expected output file may not be an error condition.  
+            # Diagnostics were handled in parsing the log file.
+            # Special action in main loop inrdb_makeB1
+            $missing_dvi_pdf = $$Pdest;
+        }
 	else {
             $failure = 1;
-	    $failure_msg = "'$rule' did not make '$$Pdest'";
 	}
     }
-    if ($return != 0) {$failure = 1;}
+    if ($return != 0) {
+        $failure = 1; 
+        $failure_msg = "Run of rule '$rule' gave a non-zero error code";
+    }
 }  #END rdb_makeB1
 
 #************************************************************
@@ -4625,14 +4763,23 @@ sub rdb_ext_cmd1 {
     
     #Set character to surround filenames:
     my $q = $quote_filenames ? '"' : '';
-    foreach ($ext_cmd) {
-        s/%O/$options/g;
-        s/%R/$q$root_filename$q/g;
-	s/%B/$q$base$q/g;
-	s/%T/$q$texfile_name$q/g;
-	s/%S/$q$source$q/g;
-	s/%D/$q$dest$q/g;
+
+    %subst = ( 
+       '%O' => $options,
+       '%R' => $q.$root_filename.$q,
+       '%B' => $q.$base.$q,
+       '%T' => $q.$texfile_name.$q,
+       '%S' => $q.$source.$q,
+       '%D' => $q.$dest.$q,
+       '%%' => '%'         # To allow literal %B, %R, etc, by %%B.
+    );
+
+    my @tokens = split /(%.)/, $ext_cmd;
+    foreach (@tokens) {
+        if (exists($subst{$_})) { $_ = $subst{$_}; }
     }
+    $ext_cmd = join '', @tokens;
+
     # print "quote is '$q'; ext_cmd = '$ext_cmd'\n";
     my ($pid, $return) = &Run_msg($ext_cmd);
     return $return;
@@ -4652,6 +4799,7 @@ sub rdb_primary_run {
     my $return = 0;
 
     my $return_latex = &rdb_run1;
+    if (-e $$Pdest) { $missing_dvi_pdf = '';}
 
     ######### Analyze results of run:
     if ( ! -e "$root_filename.log" ) {
@@ -4680,6 +4828,9 @@ sub rdb_primary_run {
     my $submake_return = &rdb_submakeB;
     &rdb_clear_change_record;
     &rdb_flag_changes_here;
+    if ($$Pout_of_date && !$silent) { 
+        &rdb_diagnose_changes( "Rule '$rule': " );
+    }
     $updated = 1;    # Flag that some dependent file has been remade
     # Fix the state of the files as of now: this will solve the
     # problem of latex and pdflatex interfering with each other,
@@ -4719,7 +4870,7 @@ sub rdb_clear_change_record {
     # Initialize diagnostics for reasons for running rule.
     @changed = ();
     @disappeared = ();
-    @no_dest = ();
+    @no_dest = ();          # We are not now using this
     @rules_never_run = ();
     @rules_to_apply = ();   # This is used in recursive application
                             # of rdb_flag_changes_here, to list
@@ -4734,24 +4885,6 @@ sub rdb_flag_changes_here {
     local $dest_mtime = 0;
     $dest_mtime = get_mtime($$Pdest) if ($$Pdest);
     rdb_do_files( \&rdb_file_change1);
-    if ( $$Pdest && (! -e $$Pdest) ) {
-## ??? 1 Sep. 2008, for cusdep no-file-exists issue
-        if ( ( $$Pcmd_type eq 'cusdep') && $$Psource && (! -e $$Psource) ) {
-            # However, if the rule is a custom dependency, this is not by
-            #  itself an error, if also the source file does not exist.  In 
-            #  that case, we may have the situation that (1) the dest file is no
-            #  longer needed by the tex file, and (2) therefore the user
-            #  has deleted the source and dest files.  After the next
-            #  latex run and the consequent analysis of the log file, the
-            #  cusdep rule will no longer be needed, and will be removed.
-
-            # So in this case, do NOT report an error          
-	}
-	else {
-            $$Pout_of_date = 1;
-            push @no_dest, $$Pdest;
-	}
-    }
     if ($$Pout_of_date) {
 	push @rules_to_apply, $rule;
     }
@@ -4809,9 +4942,11 @@ sub rdb_file_change1 {
 
 #************************************************************
 
-sub rdb_need_run {
+sub rdb_have_changes {
+    &rdb_clear_change_record;
+    rdb_recurseA( [@_], \&rdb_flag_changes_here );
     return ($#changed >= 0) || ($#no_dest >= 0) || ($#rules_to_apply >= 0);
-} #END rdb_need_run
+} #END rdb_have_changes
 
 #************************************************************
 
@@ -5183,23 +5318,35 @@ sub rdb_create_rule {
 #************************************************************
 
 sub rdb_ensure_file {
-    # rdb_ensure_file( rule, file[, fromrule] )
+    # rdb_ensure_file( rule, file[, fromrule[, set_not_exists]] )
     # Ensures the source file item exists in the given rule.
-    # Initialize to current file state if the item is created.
     # Then if the fromrule is specified, set it for the file item.
+    # If the item is created, then:
+    #    (a) by default initialize it to current file state.
+    #    (b) but if the fourth argument, set_not_exists, is true, 
+    #        initialize the item as if the file does not exist.
+    #        This case is typically used when the log file for a run
+    #        of latex/pdflatex claims that the file was non-existent
+    #        at the beginning of a run. 
 #============ rule and file data set here ======================================
     my $rule = shift;
-    local ( $new_file, $new_from_rule ) = @_;
+    local ( $new_file, $new_from_rule, $set_not_exists ) = @_;
     if ( ! rdb_rule_exists( $rule ) ) {
 	die_trace( "$My_name: BUG in rdb_ensure_file: non-existent rule '$rule'" );
     }
     if ( ! defined $new_file ) {
 	die_trace( "$My_name: BUG in rdb_ensure_file: undefined file for '$rule'" );
     }
+    if ( ! defined $set_not_exists ) { $set_not_exists = 0; }
     rdb_one_rule( $rule, 
                   sub{
                       if (! exists ${$PHsource}{$new_file} ) {
-                          ${$PHsource}{$new_file} = [fdb_get($new_file), '', 0];
+  		          if ( $set_not_exists ) {
+                              ${$PHsource}{$new_file} = [0, -1, 0, '', 0];
+		          }
+		          else {
+                              ${$PHsource}{$new_file} = [fdb_get($new_file), '', 0];
+               	          }
 		      }
 		  }
     );
@@ -6244,3 +6391,37 @@ sub finish_dir_stack {
 
 #************************************************************
 #************************************************************
+# Break handling routines (for wait-loop in preview continuous)
+
+sub end_wait {
+    #  Handler for break: Set global variable $have_break to 1.
+    # Some systems (e.g., MSWin reset) appear to reset the handler.
+    # So I'll re-enable it
+    &catch_break;
+    $have_break = 1;
+}
+
+#========================
+
+sub catch_break {
+# Capture ctrl/C and ctrl/break.
+# $SIG{INT} corresponds to ctrl/C on LINUX/?UNIX and MSWin
+# $SIG{BREAK} corresponds to ctrl/break on MSWin, doesn't exist on LINUX
+    $SIG{INT} = \&end_wait;
+    if ( exists $SIG{BREAK} ) {
+        $SIG{BREAK} = \&end_wait;
+    }
+}
+
+#========================
+
+sub default_break {
+# Arrange for ctrl/C and ctrl/break to give default behavior
+    $SIG{INT} = 'DEFAULT';
+    if ( exists $SIG{BREAK} ) {
+        $SIG{BREAK} = 'DEFAULT';
+    }
+}
+
+#************************************************************
+#************************************************************