Re: Git an case-insensitive Mac OS X filesystem

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Erik Faye-Lund <kusmabite@xxxxxxxxx> writes:

> I have stumbled upon a similar issue on Windows (which also has a
> case-preserving filesystem), and I seem to remember the solution being
> something to do with packed refs.

Packed-refs use a format like this:

$ tail -3 .git/packed-refs
e94214ce4b8acefce06d4ea37b76ac0de11ecb2d refs/tags/v1.7.9.5
bf68fe0313c833fa62755176f6e24988ef7cf80f refs/tags/v1.7.9.6
3996bb24c84013ec9ce9fa0980ce61f9ef97be4d refs/tags/v1.7.9.7

so the ref name is stored within the file, not as the file name. So,
yes, packing refs (done by "git pack-refs", called by "git gc" among
other things) should solve case-insensitive issues.

However, creating or updating refs after a pack will still create
unpacked refs, so this solves the issue only if one of the colliding
branches is not updated anymore.

> Perhaps we could change Git to detect name-collisions and
> automatically pack the refs in such cases?

That's a bit harder than it seems, as the idea is to avoid re-writting
the packed-refs file for each ref update. Repacking after each colliding
ref update could be costly in terms of performance.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/
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