From: Jeff King <peff@peff.net>
Date: Thu, 15 Mar 2012 03:54:05 GMT
Subject: Re: [PATCH v2 1/2] t0303: immediately bail out w/o GIT_TEST_CREDENTIAL_HELPER
Message-ID: <20120315035405.GA4149@sigill.intra.peff.net>
In-Reply-To: <7v8vj2omiv.fsf@alter.siamese.dyndns.org>

On Wed, Mar 14, 2012 at 03:17:28PM -0700, Junio C Hamano wrote:

> > +$GIT_TEST_CREDENTIAL_HELPER_SETUP
> 
> This used to be 'test -z "$it" || eval "$it"'; doesn't it make a
> difference?
>
> What is the value expected to be in this variable?  Nobody seems to set it
> in our codebase, so I cannot say "with the current code, this rewrite is
> safe" or anything like that.

I think eval is a better route, as it gives the caller more flexibility
about what shell code to run. The only use is here:

  http://article.gmane.org/gmane.comp.version-control.git/186757

which does work either way.

> This is probably not related to your patch, but
> 
> 	GIT_TEST_CREDENTIAL_HELPER=cache sh t0303-*.sh
> 
> passes OK for me while
> 
> 	make GIT_TEST_CREDENTIAL_HELPER=cache T=t0303-*.sh prove
> 
> seems to get stuck forever.

It's because t0303 is the generic "test any helper" script, and does not
know how to clean up the credential-cache daemon. So the daemon sticks
around, holding onto a file descriptor that causes prove to hang.
If you look at t0301 (which runs the same tests on credential-cache), we
kill the resulting daemon explicitly. t0303 could learn hooks to do
this, but I didn't bother, as I didn't need them for testing the
osxkeychain helper (which is the only thing I've used t0303 for, as
t0301 and t0302 cover the in-tree helpers). I figured that somebody
could add the hooks easily if and when they needed.

-Peff