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From: Brandon Williams <bmwill@google.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: Stefan Beller <sbeller@google.com>,
	"git@vger.kernel.org" <git@vger.kernel.org>,
	Jeff King <peff@peff.net>,
	Johannes Schindelin <johannes.schindelin@gmx.de>,
	Duy Nguyen <pclouds@gmail.com>
Subject: Re: [PATCH v3 2/5] setup: allow for prefix to be passed to git commands
Date: Fri, 17 Mar 2017 12:21:03 -0700	[thread overview]
Message-ID: <20170317192103.GE110341@google.com> (raw)
In-Reply-To: <xmqq60j77lx3.fsf@gitster.mtv.corp.google.com>

On 03/17, Junio C Hamano wrote:
> Stefan Beller <sbeller@google.com> writes:
> 
> >>         prefix = setup_git_directory_gently_1(nongit_ok);
> >> +       env_prefix = getenv(GIT_TOPLEVEL_PREFIX_ENVIRONMENT);
> >> +
> >> +       if (env_prefix)
> >> +               prefix = env_prefix;
> >> +
> >>         if (prefix)
> >>                 setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
> >
> > so we load that GIT_TOPLEVEL_PREFIX_ENVIRONMENT prefix
> > first, such that we essentially copy it into GIT_PREFIX_ENVIRONMENT,
> > such that e.g. aliased commands will know about the superprefix, too.
> 
> If the aliased commands or anything else spawned from this process
> is happy with GIT_PREFIX set to the outside of the current
> repository, doing this setenv() is OK.  If you are in ~/dir1, and
> your repository is in ~/repos/repo1, and if you somehow had a way
> to run your "git" inside ~/repos/repo1 without doing any chdir(2),
> then you are essentially setting ../../dir1/ as GIT_PREFIX for that
> "git" invocation (this has nothing to do with submodules).
> 
> But if your "git" is fine with GIT_PREFIX pointing outside the root
> level of the working tree of the current repository like that, do we
> even need a separate toplevel prefix environment, I have to wonder?
> 
> That is, if this "if TOPLEVEL_PREFIX environment is there, set it to
> local variable prefix and export it as GIT_PREFIX" is expected to
> work correctly for anything that would inherit that GIT_PREFIX, then
> we should be able to invoke the "git" that got TOPLEVEL_PREFIX
> without setting that environment, but instead setting the same value
> to GIT_PREFIX and we should get the same behaviour, no?
> 

Very true, potentially we could just use GIT_PREFIX instead of
introducing a brand new env var (which is essentially just the same
thing).  I was being cautious with this patch since git didn't currently
read GIT_PREFIX.  I was hoping other with more knowledge in this area
would voice their opinions and lead me in the right direction ;)

-- 
Brandon Williams

  reply	other threads:[~2017-03-17 19:21 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-24 23:50 [PATCH 0/5] recursing submodules with relative pathspec (grep and ls-files) Brandon Williams
2017-02-24 23:50 ` [PATCH 1/5] grep: illustrate bug when recursing with relative pathspec Brandon Williams
2017-02-26  9:53   ` Duy Nguyen
2017-02-27 18:14     ` Brandon Williams
2017-02-24 23:50 ` [PATCH 2/5] pathspec: add PATHSPEC_FROMROOT flag Brandon Williams
2017-02-25  0:31   ` Stefan Beller
2017-02-24 23:50 ` [PATCH 3/5] grep: fix bug when recuring with relative pathspec Brandon Williams
2017-02-28 21:04   ` Junio C Hamano
2017-03-02 18:00     ` Brandon Williams
2017-02-24 23:50 ` [PATCH 4/5] ls-files: illustrate bug when recursing " Brandon Williams
2017-02-24 23:51 ` [PATCH 5/5] ls-files: fix bug when recuring " Brandon Williams
2017-02-28 21:07   ` Junio C Hamano
2017-03-02 18:01     ` Brandon Williams
2017-02-27 17:52 ` [PATCH 0/5] recursing submodules with relative pathspec (grep and ls-files) Brandon Williams
2017-03-06 23:07 ` [RFC PATCH] grep: fix bug when recursing with relative pathspec Brandon Williams
2017-03-14 22:10 ` [PATCH v2 0/4] recursing submodules with relative pathspec (grep and ls-files) Brandon Williams
2017-03-14 22:10   ` [PATCH v2 1/4] grep: fix help text typo Brandon Williams
2017-03-14 22:49     ` Stefan Beller
2017-03-15  0:20       ` Brandon Williams
2017-03-14 22:10   ` [PATCH v2 2/4] setup: allow for prefix to be passed to git commands Brandon Williams
2017-03-14 22:28     ` Johannes Schindelin
2017-03-14 22:35       ` Brandon Williams
2017-03-14 22:10   ` [PATCH v2 3/4] grep: fix bug when recursing with relative pathspec Brandon Williams
2017-03-14 23:03     ` Stefan Beller
2017-03-14 22:11   ` [PATCH v2 4/4] ls-files: " Brandon Williams
2017-03-14 23:06     ` Stefan Beller
2017-03-15 17:02       ` Brandon Williams
2017-03-17 17:22   ` [PATCH v3 0/5] recursing submodules with relative pathspec (grep and ls-files) Brandon Williams
2017-03-17 17:22     ` [PATCH v3 1/5] grep: fix help text typo Brandon Williams
2017-03-17 17:22     ` [PATCH v3 2/5] setup: allow for prefix to be passed to git commands Brandon Williams
2017-03-17 19:07       ` Stefan Beller
2017-03-17 19:08         ` Brandon Williams
2017-03-17 19:10           ` Stefan Beller
2017-03-17 19:17             ` Brandon Williams
2017-03-17 19:17         ` Junio C Hamano
2017-03-17 19:21           ` Brandon Williams [this message]
2017-03-17 20:30             ` Junio C Hamano
2017-03-17 21:00               ` Brandon Williams
2017-03-17 21:25                 ` Junio C Hamano
2017-03-20 22:34                   ` Brandon Williams
2017-03-21 16:56                     ` Junio C Hamano
2017-03-28 23:58                     ` Stefan Beller
2017-03-17 17:22     ` [PATCH v3 3/5] grep: fix bug when recursing with relative pathspec Brandon Williams
2017-03-21 11:47       ` Duy Nguyen
2017-03-21 17:56         ` Junio C Hamano
2017-03-22 21:46         ` Brandon Williams
2017-03-17 17:22     ` [PATCH v3 4/5] ls-files: fix typo in variable name Brandon Williams
2017-03-17 17:22     ` [PATCH v3 5/5] ls-files: fix bug when recursing with relative pathspec Brandon Williams

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