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From: Derrick Stolee <stolee@gmail.com>
To: Elijah Newren via GitGitGadget <gitgitgadget@gmail.com>,
	git@vger.kernel.org
Cc: "Jeff King" <peff@peff.net>, "René Scharfe" <l.s.r@web.de>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
	"Elijah Newren" <newren@gmail.com>,
	"Glen Choo" <chooglen@google.com>,
	"Philip Oakley" <philipoakley@iee.email>
Subject: Re: [PATCH v3 07/11] rebase: do not attempt to remove startup_info->original_cwd
Date: Mon, 29 Nov 2021 12:50:55 -0500	[thread overview]
Message-ID: <7d90bf61-59c6-045e-1987-81d50454c260@gmail.com> (raw)
In-Reply-To: <39b1f3a225ec74a79320503eff04ba47ae4259fd.1637966463.git.gitgitgadget@gmail.com>

On 11/26/2021 5:40 PM, Elijah Newren via GitGitGadget wrote:
> From: Elijah Newren <newren@gmail.com>
> 
> Since rebase spawns a `checkout` subprocess, make sure we run that from
> the startup_info->original_cwd directory, so that the checkout process
> knows to protect that directory.
> 
> Signed-off-by: Elijah Newren <newren@gmail.com>
> ---
>  sequencer.c          | 3 +++
>  t/t2501-cwd-empty.sh | 4 ++--
>  2 files changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/sequencer.c b/sequencer.c
> index ea96837cde3..b71f7b8a0a6 100644
> --- a/sequencer.c
> +++ b/sequencer.c
> @@ -4228,6 +4228,9 @@ static int run_git_checkout(struct repository *r, struct replay_opts *opts,
>  
>  	cmd.git_cmd = 1;
>  
> +	if (startup_info->original_cwd &&
> +	    !is_absolute_path(startup_info->original_cwd))
> +		cmd.dir = startup_info->original_cwd;

I was initially confused by the "!is_absolute_path()" because
it seemed to me like it would be natural to store an absolute
path there, but I see this comment in patch 2:

+	 * For convience, we would like to have the path relative to the
+	 * worktree instead of an absolute path.

So it seems that we won't store it as an absolute path. Is
there any value in this condition, then?

This assignment of cmd.dir to the relative path has a lot
of baked-in knowledge of this variable _and_ the current
state (Git chdir()'d to the root of the worktree). If the
path is always relative, then it should be a BUG() if we
see an absolute path. Also, it seems like we would want
cmd.dir to be a concatenation of the worktree root and the
original_cwd.

Or perhaps I'm being overly cautious and this could all be
resolved with a comment about the expected state of the
working directory and original_cwd. The tests will catch if
any of those expectations change.

Thanks,
-Stolee

  reply	other threads:[~2021-11-29 22:37 UTC|newest]

Thread overview: 163+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-21  0:46 [PATCH 0/8] Avoid removing the current working directory, even if it becomes empty Elijah Newren via GitGitGadget
2021-11-21  0:46 ` [PATCH 1/8] t2501: add various tests for removing the current working directory Elijah Newren via GitGitGadget
2021-11-21 17:57   ` Ævar Arnfjörð Bjarmason
2021-11-23  1:45     ` Elijah Newren
2021-11-23  2:19       ` Ævar Arnfjörð Bjarmason
2021-11-23  3:11         ` Elijah Newren
2021-11-25 10:04           ` Ævar Arnfjörð Bjarmason
2021-11-21  0:46 ` [PATCH 2/8] repository, setup: introduce the_cwd Elijah Newren via GitGitGadget
2021-11-21  8:00   ` Junio C Hamano
2021-11-22 22:38     ` Elijah Newren
2021-11-21  8:56   ` René Scharfe
2021-11-22 23:09     ` Elijah Newren
2021-11-21  0:46 ` [PATCH 3/8] unpack-trees: refuse to remove the current working directory Elijah Newren via GitGitGadget
2021-11-21  0:46 ` [PATCH 4/8] unpack-trees: add special cwd handling Elijah Newren via GitGitGadget
2021-11-21  0:46 ` [PATCH 5/8] symlinks: do not include current working directory in dir removal Elijah Newren via GitGitGadget
2021-11-21  8:56   ` René Scharfe
2021-11-23  0:35     ` Elijah Newren
2021-11-21  0:46 ` [PATCH 6/8] clean: do not attempt to remove current working directory Elijah Newren via GitGitGadget
2021-11-21 17:51   ` Ævar Arnfjörð Bjarmason
2021-11-23  1:28     ` Elijah Newren
2021-11-21  0:46 ` [PATCH 7/8] stash: " Elijah Newren via GitGitGadget
2021-11-21  0:47 ` [PATCH 8/8] dir: avoid removing the " Elijah Newren via GitGitGadget
2021-11-23  0:39   ` Glen Choo
2021-11-23  1:19     ` Elijah Newren
2021-11-23 18:19       ` Glen Choo
2021-11-23 19:56         ` Elijah Newren
2021-11-23 20:32           ` Glen Choo
2021-11-23 21:57             ` Junio C Hamano
2021-11-23 23:23               ` Elijah Newren
2021-11-24  5:46                 ` Junio C Hamano
2021-11-23 23:13             ` Elijah Newren
2021-11-24  0:39               ` Glen Choo
2021-11-24  5:46                 ` Junio C Hamano
2021-11-24  1:10           ` Ævar Arnfjörð Bjarmason
2021-11-24  4:35             ` Elijah Newren
2021-11-24 11:14               ` Ævar Arnfjörð Bjarmason
2021-11-24 14:11                 ` Ævar Arnfjörð Bjarmason
2021-11-25  2:54                   ` Elijah Newren
2021-11-25 11:12                     ` Ævar Arnfjörð Bjarmason
2021-11-26 21:40                       ` The overhead of bin-wrappers/ (was: [PATCH 8/8] dir: avoid removing the current working directory) Ævar Arnfjörð Bjarmason
2021-11-24 14:33                 ` [PATCH 8/8] dir: avoid removing the current working directory Philip Oakley
2021-11-24 19:46                   ` Junio C Hamano
2021-11-25 12:54                     ` Philip Oakley
2021-11-25 13:51                       ` Ævar Arnfjörð Bjarmason
2021-11-25  2:48                 ` Elijah Newren
2021-11-24 19:43               ` Junio C Hamano
2021-11-21  8:11 ` [PATCH 0/8] Avoid removing the current working directory, even if it becomes empty Junio C Hamano
2021-11-25  8:39 ` [PATCH v2 0/9] " Elijah Newren via GitGitGadget
2021-11-25  8:39   ` [PATCH v2 1/9] t2501: add various tests for removing the current working directory Elijah Newren via GitGitGadget
2021-11-25 10:21     ` Ævar Arnfjörð Bjarmason
2021-11-25  8:39   ` [PATCH v2 2/9] setup: introduce startup_info->original_cwd Elijah Newren via GitGitGadget
2021-11-25 10:44     ` Ævar Arnfjörð Bjarmason
2021-11-26 17:55       ` Elijah Newren
2021-11-26  6:52     ` Junio C Hamano
2021-11-26 18:01       ` Elijah Newren
2021-11-29 14:05     ` Derrick Stolee
2021-11-29 17:18       ` Elijah Newren
2021-11-29 17:43         ` Derrick Stolee
2021-11-29 17:42       ` Junio C Hamano
2021-11-25  8:39   ` [PATCH v2 3/9] unpack-trees: refuse to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-11-25 10:56     ` Ævar Arnfjörð Bjarmason
2021-11-26 18:06       ` Elijah Newren
2021-11-29 14:10     ` Derrick Stolee
2021-11-29 17:26       ` Elijah Newren
2021-11-25  8:39   ` [PATCH v2 4/9] unpack-trees: add special cwd handling Elijah Newren via GitGitGadget
2021-11-29 14:14     ` Derrick Stolee
2021-11-29 17:33       ` Elijah Newren
2021-11-25  8:39   ` [PATCH v2 5/9] symlinks: do not include startup_info->original_cwd in dir removal Elijah Newren via GitGitGadget
2021-11-25  8:39   ` [PATCH v2 6/9] clean: do not attempt to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-11-25  8:39   ` [PATCH v2 7/9] stash: " Elijah Newren via GitGitGadget
2021-11-25 10:58     ` Ævar Arnfjörð Bjarmason
2021-11-26 18:04       ` Elijah Newren
2021-11-25  8:39   ` [PATCH v2 8/9] dir: avoid incidentally removing the original_cwd in remove_path() Elijah Newren via GitGitGadget
2021-11-25  8:39   ` [PATCH v2 9/9] dir: new flag to remove_dir_recurse() to spare the original_cwd Elijah Newren via GitGitGadget
2021-11-26 22:40   ` [PATCH v3 00/11] Avoid removing the current working directory, even if it becomes empty Elijah Newren via GitGitGadget
2021-11-26 22:40     ` [PATCH v3 01/11] t2501: add various tests for removing the current working directory Elijah Newren via GitGitGadget
2021-11-27 10:32       ` Ævar Arnfjörð Bjarmason
2021-11-27 19:16         ` Elijah Newren
2021-11-26 22:40     ` [PATCH v3 02/11] setup: introduce startup_info->original_cwd Elijah Newren via GitGitGadget
2021-11-27 10:35       ` Ævar Arnfjörð Bjarmason
2021-11-27 17:05         ` Elijah Newren
2021-11-27 10:40       ` Ævar Arnfjörð Bjarmason
2021-11-27 18:31         ` Elijah Newren
2021-11-28 18:04           ` Ævar Arnfjörð Bjarmason
2021-11-29 21:58             ` Elijah Newren
2021-11-26 22:40     ` [PATCH v3 03/11] unpack-trees: refuse to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-11-26 22:40     ` [PATCH v3 04/11] unpack-trees: add special cwd handling Elijah Newren via GitGitGadget
2021-11-26 22:40     ` [PATCH v3 05/11] symlinks: do not include startup_info->original_cwd in dir removal Elijah Newren via GitGitGadget
2021-11-26 22:40     ` [PATCH v3 06/11] clean: do not attempt to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-11-26 22:40     ` [PATCH v3 07/11] rebase: " Elijah Newren via GitGitGadget
2021-11-29 17:50       ` Derrick Stolee [this message]
2021-11-29 19:22         ` Elijah Newren
2021-11-29 19:42           ` Derrick Stolee
2021-11-26 22:40     ` [PATCH v3 08/11] stash: " Elijah Newren via GitGitGadget
2021-11-26 22:41     ` [PATCH v3 09/11] dir: avoid incidentally removing the original_cwd in remove_path() Elijah Newren via GitGitGadget
2021-11-26 22:41     ` [PATCH v3 10/11] dir: new flag to remove_dir_recurse() to spare the original_cwd Elijah Newren via GitGitGadget
2021-11-26 22:41     ` [PATCH v3 11/11] t2501: simplify the tests since we can now assume desired behavior Elijah Newren via GitGitGadget
2021-11-29 17:57     ` [PATCH v3 00/11] Avoid removing the current working directory, even if it becomes empty Derrick Stolee
2021-11-29 22:37     ` [PATCH v4 " Elijah Newren via GitGitGadget
2021-11-29 22:37       ` [PATCH v4 01/11] t2501: add various tests for removing the current working directory Elijah Newren via GitGitGadget
2021-11-30  6:47         ` Junio C Hamano
2021-11-30  6:53           ` Elijah Newren
2021-11-29 22:37       ` [PATCH v4 02/11] setup: introduce startup_info->original_cwd Elijah Newren via GitGitGadget
2021-11-29 22:37       ` [PATCH v4 03/11] unpack-trees: refuse to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-11-29 22:37       ` [PATCH v4 04/11] unpack-trees: add special cwd handling Elijah Newren via GitGitGadget
2021-11-29 22:37       ` [PATCH v4 05/11] symlinks: do not include startup_info->original_cwd in dir removal Elijah Newren via GitGitGadget
2021-11-29 22:37       ` [PATCH v4 06/11] clean: do not attempt to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-11-29 22:37       ` [PATCH v4 07/11] rebase: " Elijah Newren via GitGitGadget
2021-11-29 22:37       ` [PATCH v4 08/11] stash: " Elijah Newren via GitGitGadget
2021-11-29 22:37       ` [PATCH v4 09/11] dir: avoid incidentally removing the original_cwd in remove_path() Elijah Newren via GitGitGadget
2021-11-29 22:37       ` [PATCH v4 10/11] dir: new flag to remove_dir_recurse() to spare the original_cwd Elijah Newren via GitGitGadget
2021-11-29 22:37       ` [PATCH v4 11/11] t2501: simplify the tests since we can now assume desired behavior Elijah Newren via GitGitGadget
2021-11-29 23:38       ` [PATCH v4 00/11] Avoid removing the current working directory, even if it becomes empty Eric Sunshine
2021-11-30  0:16         ` Elijah Newren
2021-12-01  6:40       ` [PATCH v5 " Elijah Newren via GitGitGadget
2021-12-01  6:40         ` [PATCH v5 01/11] t2501: add various tests for removing the current working directory Elijah Newren via GitGitGadget
2021-12-01  6:40         ` [PATCH v5 02/11] setup: introduce startup_info->original_cwd Elijah Newren via GitGitGadget
2021-12-01  6:40         ` [PATCH v5 03/11] unpack-trees: refuse to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-12-01  6:40         ` [PATCH v5 04/11] unpack-trees: add special cwd handling Elijah Newren via GitGitGadget
2021-12-01  6:40         ` [PATCH v5 05/11] symlinks: do not include startup_info->original_cwd in dir removal Elijah Newren via GitGitGadget
2021-12-01  6:40         ` [PATCH v5 06/11] clean: do not attempt to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-12-01  6:40         ` [PATCH v5 07/11] rebase: " Elijah Newren via GitGitGadget
2022-01-25 20:26           ` [Bug] Rebase from worktree subdir is broken (was Re: [PATCH v5 07/11] rebase: do not attempt to remove startup_info->original_cwd) Glen Choo
2022-01-25 23:59             ` Elijah Newren
2022-01-26  0:30               ` Glen Choo
2022-01-26 19:04                 ` Elijah Newren
2022-01-26  0:32               ` Eric Sunshine
2022-01-26  0:38                 ` Eric Sunshine
2022-01-26  0:51                   ` Elijah Newren
2022-01-26  1:15                     ` Glen Choo
2022-01-26  1:38                       ` Elijah Newren
2022-01-26 11:00               ` Phillip Wood
2022-01-26 17:53                 ` Eric Sunshine
2022-01-27 11:01                   ` Phillip Wood
2022-01-27 20:03                   ` Elijah Newren
2022-02-05 11:23                     ` Eric Sunshine
2022-02-05 11:42                       ` Eric Sunshine
2022-02-05 22:35                         ` Elijah Newren
2021-12-01  6:40         ` [PATCH v5 08/11] stash: do not attempt to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-12-01  6:40         ` [PATCH v5 09/11] dir: avoid incidentally removing the original_cwd in remove_path() Elijah Newren via GitGitGadget
2021-12-01  6:40         ` [PATCH v5 10/11] dir: new flag to remove_dir_recurse() to spare the original_cwd Elijah Newren via GitGitGadget
2021-12-01  6:40         ` [PATCH v5 11/11] t2501: simplify the tests since we can now assume desired behavior Elijah Newren via GitGitGadget
2021-12-07 16:09         ` [PATCH v5 00/11] Avoid removing the current working directory, even if it becomes empty Derrick Stolee
2021-12-07 18:30           ` Ævar Arnfjörð Bjarmason
2021-12-07 20:57             ` Derrick Stolee
2021-12-08 10:23               ` Ævar Arnfjörð Bjarmason
2021-12-07 20:43           ` Elijah Newren
2021-12-07 21:00             ` Derrick Stolee
2021-12-09  5:08         ` [PATCH v6 " Elijah Newren via GitGitGadget
2021-12-09  5:08           ` [PATCH v6 01/11] t2501: add various tests for removing the current working directory Elijah Newren via GitGitGadget
2022-03-11 11:57             ` Ævar Arnfjörð Bjarmason
2021-12-09  5:08           ` [PATCH v6 02/11] setup: introduce startup_info->original_cwd Elijah Newren via GitGitGadget
2021-12-09  5:08           ` [PATCH v6 03/11] unpack-trees: refuse to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-12-09  5:08           ` [PATCH v6 04/11] unpack-trees: add special cwd handling Elijah Newren via GitGitGadget
2021-12-09  5:08           ` [PATCH v6 05/11] symlinks: do not include startup_info->original_cwd in dir removal Elijah Newren via GitGitGadget
2021-12-09  5:08           ` [PATCH v6 06/11] clean: do not attempt to remove startup_info->original_cwd Elijah Newren via GitGitGadget
2021-12-09  5:08           ` [PATCH v6 07/11] rebase: " Elijah Newren via GitGitGadget
2021-12-09  5:08           ` [PATCH v6 08/11] stash: " Elijah Newren via GitGitGadget
2021-12-09  5:08           ` [PATCH v6 09/11] dir: avoid incidentally removing the original_cwd in remove_path() Elijah Newren via GitGitGadget
2021-12-09  5:08           ` [PATCH v6 10/11] dir: new flag to remove_dir_recurse() to spare the original_cwd Elijah Newren via GitGitGadget
2021-12-09  5:08           ` [PATCH v6 11/11] t2501: simplify the tests since we can now assume desired behavior Elijah Newren via GitGitGadget
2021-11-30 11:04     ` [PATCH v3 00/11] Avoid removing the current working directory, even if it becomes empty Phillip Wood
2021-12-01  0:03       ` Elijah Newren

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