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From: Duy Nguyen <pclouds@gmail.com>
To: Jeff King <peff@peff.net>
Cc: Rafael Ascensao <rafa.almas@gmail.com>,
	Git Mailing List <git@vger.kernel.org>
Subject: Re: [PATCH 3/4] set_work_tree: use chdir_notify
Date: Thu, 29 Mar 2018 19:02:21 +0200	[thread overview]
Message-ID: <CACsJy8CAjb4zdAgD5H9OZOAoHdrRFzGm9gaL8Wbna+GXJJCW4Q@mail.gmail.com> (raw)
In-Reply-To: <20180328174215.GC16274@sigill.intra.peff.net>

On Wed, Mar 28, 2018 at 7:42 PM, Jeff King <peff@peff.net> wrote:
> When we change to the top of the working tree, we manually
> re-adjust $GIT_DIR and call set_git_dir() again, in order to
> update any relative git-dir we'd compute earlier.

Another way to approach this problem is not delaying chdir() at all.
We have to delay calling setup_work_tree() and not do it in
setup_git_directory() because it can die() when chdir() fails. But in
many cases, the command does not actually need the worktree and does
not deserve to die. But what if we make setup_work_tree be gentle?

If it successfully chdir() at the end of setup_git_directory() (and
perhaps before the first set_git_dir call), great! The problem we're
dealing here vanishes. If it fails, don't die, just set a flag. Later
on when a command requests a worktree, we can check this flag and now
can die().

It's less code this way, but it uses up more of your (or my) time
because even though the first set_git_dir() call actually happens at 8
places. Is it worth trying ?
-- 
Duy

  reply	other threads:[~2018-03-29 17:02 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-26 21:27 git complains packed-refs is not a directory when used with GIT_DIR and GIT_WORK_TREE envvars Rafael Ascensao
2018-03-26 21:44 ` Ævar Arnfjörð Bjarmason
2018-03-27  6:31 ` Jeff King
2018-03-27 14:56   ` Duy Nguyen
2018-03-27 16:47     ` Jeff King
2018-03-27 17:09       ` Duy Nguyen
2018-03-27 17:30         ` Duy Nguyen
2018-03-28  9:52           ` Jeff King
2018-03-28 10:10             ` Duy Nguyen
2018-03-28 17:36               ` Jeff King
2018-03-28 17:38                 ` [PATCH 1/4] set_git_dir: die when setenv() fails Jeff King
2018-03-28 17:40                 ` [PATCH 2/4] add chdir-notify API Jeff King
2018-03-28 17:58                   ` Eric Sunshine
2018-03-28 18:02                     ` Jeff King
2018-03-29 14:53                   ` Duy Nguyen
2018-03-29 17:48                     ` Jeff King
2018-03-29 18:12                       ` Duy Nguyen
2018-03-28 17:42                 ` [PATCH 3/4] set_work_tree: use chdir_notify Jeff King
2018-03-29 17:02                   ` Duy Nguyen [this message]
2018-03-29 17:23                     ` Duy Nguyen
2018-03-29 17:50                       ` Jeff King
2018-03-29 17:50                     ` Jeff King
2018-03-29 18:01                       ` Duy Nguyen
2018-03-30 17:23                         ` Jeff King
2018-03-28 17:43                 ` [PATCH 4/4] refs: use chdir_notify to update cached relative paths Jeff King
2018-03-30 18:34                 ` [PATCH v2 0/5] re-parenting relative directories after chdir Jeff King
2018-03-30 18:34                   ` [PATCH v2 1/5] set_git_dir: die when setenv() fails Jeff King
2018-03-30 18:34                   ` [PATCH v2 2/5] trace.c: export trace_setup_key Jeff King
2018-03-30 19:46                     ` Junio C Hamano
2018-03-30 19:47                       ` Jeff King
2018-03-30 19:50                         ` Junio C Hamano
2018-03-30 19:54                           ` Jeff King
2018-03-30 18:35                   ` [PATCH v2 3/5] add chdir-notify API Jeff King
2018-03-30 18:35                   ` [PATCH v2 4/5] set_work_tree: use chdir_notify Jeff King
2018-03-30 18:35                   ` [PATCH v2 5/5] refs: use chdir_notify to update cached relative paths Jeff King
2018-03-30 19:36                   ` [PATCH v2 0/5] re-parenting relative directories after chdir Duy Nguyen
2018-03-28  9:47         ` git complains packed-refs is not a directory when used with GIT_DIR and GIT_WORK_TREE envvars Jeff King
2018-03-28 17:55           ` [PATCH 0/8] " Nguyễn Thái Ngọc Duy
2018-03-28 17:55             ` [PATCH 1/8] strbuf.c: add strbuf_ensure_trailing_dr_sep() Nguyễn Thái Ngọc Duy
2018-03-28 17:55             ` [PATCH 2/8] strbuf.c: reintroduce get_pwd_cwd() (with strbuf_ prefix) Nguyễn Thái Ngọc Duy
2018-03-28 18:02               ` Stefan Beller
2018-03-28 18:05                 ` Duy Nguyen
2018-03-28 17:55             ` [PATCH 3/8] trace.c: export trace_setup_key Nguyễn Thái Ngọc Duy
2018-03-28 17:55             ` [PATCH 4/8] setup.c: introduce setup_adjust_path() Nguyễn Thái Ngọc Duy
2018-03-28 17:55             ` [PATCH 5/8] setup.c: allow other code to be notified when $CWD moves Nguyễn Thái Ngọc Duy
2018-03-28 17:55             ` [PATCH 6/8] environment.c: adjust env containing relpath when $CWD is moved Nguyễn Thái Ngọc Duy
2018-03-28 18:30               ` Jeff King
2018-03-28 18:45                 ` Duy Nguyen
2018-03-28 17:55             ` [PATCH 7/8] repository: adjust repo paths when $CWD moves Nguyễn Thái Ngọc Duy
2018-03-28 17:55             ` [PATCH 8/8] refs: adjust main " Nguyễn Thái Ngọc Duy
2018-03-28 18:19             ` [PATCH 0/8] Re: git complains packed-refs is not a directory when used with GIT_DIR and GIT_WORK_TREE envvars Jeff King
2018-03-29 14:57               ` Duy Nguyen
2018-03-30 17:21                 ` Jeff King
2018-03-28 22:24             ` Junio C Hamano

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