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

Hui Yiqun [off-list ref] writes:

t0301 now tests git-credential-cache support for XDG user-specific
runtime file $XDG_RUNTIME_DIR/git/credential.sock. Specifically:

* if $XDG_RUNTIME_DIR exists, use socket at
  `$XDG_RUNTIME_DIR/git/credential-cache.sock`.

* otherwise, `/tmp/git-$uid/credential-cache.sock` is taken.

Is it better to have the fallback in /tmp, and not in
~/.git-credential-cache/, and why?

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)?

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.

Thanks.