On Thu, Jan 7, 2016 at 9:04 AM, Jeff King [off-list ref] wrote:

quoted

Yup, an area that is reasonably isolated from the remainder of the system like
this might be a good starting point. But I suspect that the invasion needs to
happen in the opposite direction in this particular case before it happens.
That is, if libgit2's implementation does not behave like how we do, it needs to
be fixed, possibly by discarding what they did and instead importing code from
us. After the behaviour of libgit2 is fixed, we can talk about the
invasion in the
opposite direction.

Unfortunately, "importing code from us" is not so easy. :(

They'll either need to contact the wildmatch authors, or rewrite
wildmatch from scratch.

wildmatch author relicensed it on request before [1] so he might do it
again (hard to say). I'm not sure if there are other authors though.
But even with wildmatch good to go, there still a lot of work to do.

[1] http://thread.gmane.org/gmane.comp.version-control.git/264312/focus=264328
-- 
Duy