texdiff - Online in the Cloud

PROGRAM:

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.

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