Re: On pathnames

From: Sean <seanlkml@sympatico.ca>
Date: Jan 24, 2008, 23:56 UTC
Message-ID: <BAYC1-PASMTP12CD8892FB04872736D9DEAE380@CEZ.ICE>
In-Reply-To: <7vprvr7x8h.fsf@gitster.siamese.dyndns.org>

On Thu, 24 Jan 2008 13:02:54 -0800 Junio C Hamano <gitster@pobox.com> wrote:

Show 6 quoted lines

> One bad issue during development is that we cannot sanely
> emulate case folding behaviour on non case-folding filesystems
> without wrapping open(2), lstat(2), and friends, because of the
> assumption we made above in (2) where we defined the term "case
> folding".  This means that the codepath to deal with case
> folding filesystems inevitably are harder to debug.

All true. Though Linux support for creating and using HFS+ volumes seems like it may be helpful. Trying the test case patch[*] posted by Mitch Tishmack showed the problem here. The only slightly strange thing was that there didn't seem to be an issue with the gitweb/test/Märchen file after cloning to the HFS volume.

Sean.

[*]
$ dd bs=1M count=250 < /dev/zero > hfs_vol
  262144000 bytes (262 MB) copied, 6.12703 s, 42.8 MB/s

$ /sbin/mkfs.hfsplus -v Test -n c=4096,e=1024 hfs_vol
  Initialized hfs_vol as a 250 MB HFS Plus volume

$ mkdir hfs
$ sudo mount -t hfsplus -o loop hfs_vol hfs
$ sudo chmod a+rwx hfs
$ cd hfs
$ git clone ~/local/sources/git
  Initialized empty Git repository in ~/hfs/git/.git/
  49486 blocks

$ cd git
$ make
   ...

$ cd t
$ git apply ~/Mitch_Tishmack.patch
$ ./t0060-normalization.sh
  * FAIL 1: setup

	  touch ä &&
	  git add ä &&
	  git commit -m "initial"
	  git tag initial &&
	  git checkout -b topic &&
	  git mv ä tmp &&
	  git mv tmp ä &&
	  git commit -m "rename" &&
	  git checkout -f master
	
  * FAIL 2: rename (silent normalization)
	
	 git mv ä ä &&
	 git commit -m "rename"
	
  * FAIL 3: merge (silent normalization)

	 git reset --hard initial &&
	 git merge topic
	
  * failed 3 among 3 test(s)

Sean.