Use latexdiff tool with git

What is latexdiff ? Below the description of the debian package:

Package: latexdiff

Version: 0.5-4

Architecture: all

Depends: perl

Recommends: texlive-latex-base, texlive-latex-extra

Suggests: subversion

cvs

rcs

Description-en: utility to mark up significant differences between LaTeX files latexdiff compares two LaTeX files and marks up significant differences between them (i.e. a diff for LaTeX files). It generates a new LaTeX file containing the annotated differences.

Various options are available for visual markup using standard LaTeX packages such as ‘color.sty’. Changes not directly affecting visible text, for example in formatting commands, are still marked in the LaTeX source.

A rudimentary revision facilility is provided by another Perl script, ‘latexrevise’, which accepts or rejects all changes. Manual editing of the difference file can be used to override this default behaviour and accept or reject selected changes only.

Homepage: http://bullard.esc.cam.ac.uk/~tilmann/soft.html

First install latexdiff

$ sudo apt-get install latexdiff

To use it with git, just add this line to your ~/.gitconfig:

[difftool.latexdiff]
    cmd = latexdiff "$LOCAL" "$REMOTE"

For example to generate a diff file diff.tex between the current version of the file document.tex and the commit 83533d8 just type:

$ git difftool -t latexdiff 83533d8 -- document.tex > diff.tex

And now you can compile the diff.tex to highlight the difference easily.