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Oct 19, 2009, 12:59 PM
Post #3 of 5
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On Mon, Oct 19, 2009 at 12:47 PM, Arjun Priyananth <priyananth [at] gmail> wrote:
> Can anyone tell me what is the tool which wikipedia uses for file compare.
> (in the wikipedia website it compares two history) what is that tool please
It's a PHP difference engine that's part of MediaWiki:
http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/includes/diff/
There's also a C++ version implementing the same algorithm, which is
available as a PHP extension and can be used to drastically reduce CPU
usage:
http://svn.wikimedia.org/viewvc/mediawiki/trunk/extensions/wikidiff2/
On Mon, Oct 19, 2009 at 1:45 PM, Roan Kattouw <roan.kattouw [at] gmail> wrote:
> It's the standard GNU diff utility, which is available on most
> Linux/UNIX systems.
Um, no? If we used that, we'd fail on every Windows system, and every
Unix system with exec() disabled. Plus, that's a line-level diff, not
word-level -- you'd have to use wdiff or such. For undoing, AFAIK we
do rely on diff3, and I suspect undoing just always fails on Windows
(although I might be wrong, never actually tried).
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