NAME

       texdiff - Compares two (La)TeX documents to create a merged version showing changes,
       similar to that of 'Change Tracking' in some word processors.

SYNOPSIS

       texdiff [--nofloats⎪-n] old.tex new.tex [diff.tex]

DESCRIPTION

       The first two files are compared and a new TeX file is output. When the output file is
       processed with (La)TeX it marks new changes with blue and old text with red with a strike-
       through line. Furthermore, passages with changes are marked at the margin with grey bars
       by the LaTeX "changebar" package (although only after running "dvips", in "xdvi" the bars
       are one inch too far left to compensate the one inch offset inserted by TeX printer
       drivers).

       "texdiff" uses and therefore requires the "wdiff" command to insert these marks. If LaTeX
       macros are included in those striked out or underlined passages, the latex run will most
       likely fail. The source of most problems lies in "wdiff" tearing apart pairs of braces.
       Therefore "texdiff" is a perl script that calls "wdiff" internally and fixes "wdiff"'s
       output by re-pairing braces again and handling some commonly used LaTeX macros.

       For texdiff to work, the following LaTeX code must be inserted in the preamble of the
       LaTeX document:

        \usepackage{xcolor} \usepackage{ulem} \usepackage{changebar}
        \newcommand\TLSins[1]{\cbstart{}\textcolor{ins}{\uline{#1}}\cbend{}}
        \newcommand\TLSdel[1]{\cbdelete{}\textcolor{del}{\sout{#1}}}

       Define editing colors "ins" and "del" with existing "xcolor" color names:
        \colorlet{ins}{blue} \colorlet{del}{red}

       Or from scratch:
        \definecolor{ins}{rgb}{0, 0.5, 0}

       These macros are NOT automatically interted at \begin{document} like the original scripts
       did (see the ACKNOWLEDGMENTS section below), because this will not work on files of a
       multi-file document (those included by \include or \input).  Furthermore, if you insert
       the macros manually, you can tune them as you like, i. e. change text color or position of
       changebars. Have a look at the documentation of the ulem and changebar packages on how to
       do this!

OPTIONS

       --nofloats, -n
           If given, skips contents of figure environments, but does show insertions and
           deletions in the caption commands. This is done to avoid complex messups in subfloat
           or complex figure environments.

       --debug, -d
           Turns on debugging. Temporary files that contain numbered braces are kept and a raw
           difference file is written as output file name appended with '-wdiff.tex'. In
           addition, several regular expression diagnostics are printed. Warning: produces a lot
           of output.

AUTHOR

       Mark Doll <markdoll<AT>gmx.net>, Cengiz Gunay <cengique<AT>users.sf.net>.

ACKNOWLEDGMENTS

       *   Version 0.4, by CG, 2009/09/15. Added use of GetOpt to take an optional parameter to
           skip float (e.g., figure or table) contents. Added an optional debug mode. Embedded
           POD documentation. Fixed problem with insertion and deletions appearing in the middle
           of sectioning commands by throwing off LaTeX.

       *   Version 0.3, modified by Cengiz Gunay <cengique@users.sf.net>, 2009/06/30. Added some
           Latex commands that should be excluded and fixed handling of '\%' characters.

       *   Version 0.2, is a perl implementation of TeXdiff by Mark Doll <markdoll@gmx.net>,
           2006/08/09. It was derived from the original bash and perl scripts created by Robert
           Maron <robmar@mimuw.edu.pl>, available at http://www.robmar.net/TexDiff/. This version
           of texdiff is available at http://mark.doll.name/texdiff/.

COPYRIGHT AND LICENSE

       Copyleft 2006-2009, Mark Doll and Cengiz Gunay

       This library is free software; you may redistribute it and/or modify it under the same
       terms as Perl itself.