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Re: Bug in svn on MacOS X 10.4 with ._ files on UFS

From: Ryan Schmidt <subversion-2005_at_ryandesign.com>
Date: 2005-06-01 17:31:51 CEST

On 01.06.2005, at 17:20, Ben Collins-Sussman wrote:

> On Jun 1, 2005, at 4:18 AM, Ryan Schmidt wrote:
>
>> I was pretty sure I'd heard from others on this list that they're
>> using Subversion on 10.4 without problems. But maybe they're not
>> using any files with a ._ component? or maybe they're not using UFS?
>
> Ryan, I just spoke with fitz, who is a former apple guy, and I think
> your analysis is spot-on. If both 'foo' and '._foo' are in the
> repository, then 'svn checkout' downloads the files into .svn/tmp/.
> It then asks APR to move 'foo' into the visible working area... but
> then the darwin kernel moves *both* files when this happens.
>
> This is effectively a 10.4 kernel feature... or bug, depending on how
> you look at it. APR asks the OS to move a file, and it moves 2 files
> instead. I don't think there's anything either Subversion or APR can
> do about this. The only advice is either (1) don't use UFS, or (2)
> don't put ._foo files under version control (why would you do that
> anyway?)

Re (1): I'm not convinced it's only a UFS problem. My 10.4 DVD arrived
today so I'll be able to test this on HFS+ soon.

Re (2): There may be valid reasons to include ._ files in the
repository. They contain the resource fork, so any files that are
old-school Mac files that require resource forks would be destroyed if
the ._ file were not maintained. And since 10.4 now stores even more
stuff in there (ACL properties for example?) there may now be even more
reason one would want to version those.

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Received on Wed Jun 1 17:33:55 2005

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