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  1. Bug #172383
  2. Comment #7

Comment 7 for bug 172383

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n[ate]vw (natevw) wrote : Re: Cannot add NFD normalized Unicode file to repo

Looks like MacFUSE is pondering similar issues and currently does not do any normalization: http://code.google.com/p/macfuse/wiki/FILENAME_ENCODING_PROPOSAL

So I understand the circumstances on OS X to be as follows:
1. HFS+, the main filesystem, always decomposes most (http://developer.apple.com/technotes/tn/tn1150.html#UnicodeSubtleties) characters internally.
2. Other filesystems are encouraged to return decomposed filenames (see QA1173 link above). Whether this is the HFS+ decomposition or pure NFD I am not sure. The links to the HFS+ decomposition implementation seem to suggest the former.
3. A few filesystems (NFS, current MacFUSE) do not decompose filenames.

I still think the pragmatic approach outlined above would give good mileage in each of the above situations. If you'd like I can see how OS X's FAT32 implementation deals with normalization and report back.