Re: [PATCH/RFC/GSoC 3/3] t0301: test credential-cache support of XDG_RUNTIME_DIR

[Junio C Hamano <gitster@pobox.com>]

惠轶群 <huiyiqun@gmail.com> writes:

>> Is it because the wish is to always use /tmp/git-$uid/ as a fallback
>> for $XDG_RUNTIME_DIR (as opposed to ~/.git-credential-cache/, which
>> is specific to the credential-cache and would look strange if we
>> used it for other "runtime" things)?
>
> Yes, I mean to use it as a general fallback for git.

If that is the case the code probably needs to be a bit more careful
before deciding to use /tmp/git-$uid/ directory (is it really $uid's?
can anybody else write to it to race with the real user? etc.)

> On the other hand, I think, falling back to $HOME/.git-credential-cache/socket
> doesn't make any sense for back-compability cannot be ensured.

What do you mean by that?

Using ~/.git-credential-cache/credential-cache.sock would not help
at all for existing users, but ~/.git-credential-cache/socket would
interoperate well with users with existing versions of Git, no?

>> Just being curious, and wanting to see the reasoning behind the
>> design decision the patch series makes in the log message of one of
>> these patches.