ConTeXt equivalent of latexdiff

Question

I was just wondering if anyone knows of a ConTeXt equivalent to latexdiff?

For those not familiar with latexdiff: it is a Perl script that marks up differences between 2 latex files. It is included with many LaTeX distributions.

It is used as follows:

$ latexdiff old.tex new.tex > diff.tex

Then when you compile the output diff.tex, it shows added text in blue, and deleted text in red strikethrough. E.g., http://haakoh.at.ifi.uio.no/latexdiff/

Does anyone knows of a ConTeXt tool that achieves something similar?

If not, can anyone offer any pointers on how the latexdiff Perl script might be leveraged/ported to a "contextdiff" equivalent?

Answer 1

Try texdiff. It should work with ConTeXt.

Answer 2

@user21568 is right, texdiff works with ConTeXt.

However while the texdiff doco lists an example preamble for LaTeX, it doesn't offer any advice for ConTeXt.

So for the benefit of anyone else interested in using texdiff with ConTeXt, here is a preamble that i have found useful:

% Define a blue underline bar for insertions
\definebar[insbar][color=blue, offset=-0.4, continue=yes]

% Define a red strikethrough bar for deletions
\definebar[delbar][color=red, offset=0.5, continue=yes]

% Define the insertion macro. Note the inmargin marker.
\def\TLSins#1{{\inmargin{\color[blue]{--->}}\startbar[insbar]\color[blue]{#1}\stopbar}}

% Define the deletion macro.
\def\TLSdel#1{{\inmargin{\color[red]{--->}}\startbar[delbar]\color[red]{#1}\stopbar}}

% Override ConTeXt protect command to do nothing.
% This might have undesired consequences for advanced ConTeXt users?
\def\protect{}

Note the redefinition of protect: this is a workaround of the fact that the protect commands that texdiff generates do not compile under ConTeXt - it seems that this command has different usage in ConTeXt than in LaTeX.