On Tue, Jul 31, 2012 at 11:37 AM, Junio C Hamano <gits...@pobox.com> wrote:
>  * This is not even compile tested, so it needs testing and
>    benchmarking, as I do not even know how costly the calls to
>    open/close are when we do not have to call iconv() itself.

Ok, so it's easily compile-tested: just add

+       COMPAT_OBJS += compat/precompose_utf8.o

to the makefile for Linux too.

Actually testing how well it *works* is hard, since I don't really
have a mac (well, I do, but it no longer has OS X on it ;), and the
whole "utf-8-mac" thing does not make sense.

HOWEVER. I actually tested it with the conversion being from Latin1 to
UTF-8 instead, and it does interesting things, and kind of works. I
say "kind of", because for the case of the filesystem being in Latin1,
we actually have to convert things back to the filesystem character
set when doing "open()" and "lstat()", and this patch obviously
doesn't do that, because OS X does the conversion back to NFD on its

But ACK on the patch.

If I had more time, I'd actually be interested to do the generic case
of namespace conversion, and we could make this a generic git feature
- it's something I wanted to do long ago. However, right now I'm in
the merge window and will go on a vacation to Finland after that, so I
probably won't get around to it.

I do have one suggestion: please rename the "has_utf8()" function to
"has_nonascii()" too. Why? Because that's what the function actually
does. It has nothing to do with testing for UTF-8 (the utf-8 rules are
more complex than just "high bit set"), and *if* I ever get around to
doing a more generic character set conversion for the filenames, the
decision really would be about non-ASCII, not about non-UTF8.

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