From: Emily Shaffer <emilyshaffer@google.com>
To: Derrick Stolee <stolee@gmail.com>
Cc: git@vger.kernel.org
Subject: Re: [PATCH v3 4/4] submodule: record superproject gitdir during 'update'
Date: Thu, 14 Oct 2021 11:45:36 -0700 [thread overview]
Message-ID: <YWh60MiWNKC8JseC@google.com> (raw)
In-Reply-To: <66111c98-8be3-d3e5-288f-cb5b59744cb5@gmail.com>
On Thu, Aug 19, 2021 at 08:59:55PM -0400, Derrick Stolee wrote:
>
> On 8/19/2021 4:09 PM, Emily Shaffer wrote:
> > + # Cache a pointer to the superproject's gitdir. This may have
> > + # changed, so rewrite it unconditionally. Writes it to worktree
> > + # if applicable, otherwise to local.
> > + relative_gitdir="$(git rev-parse --path-format=relative \
> > + --prefix "${sm_path}" \
> > + --git-dir)"
> > +
> > + git -C "$sm_path" config --worktree \> + submodule.superprojectgitdir "$relative_gitdir"
>
> Ok, I see now why you care about the worktree config. The scenario you
> are covering is something like moving a submodule within a worktree and
> not wanting to change the relative path of other copies of that submodule
> within other worktrees, yes?
>
> For commands such as 'init' and 'add', we don't have the possibility of
> colliding with other worktrees because the submodule is being created
> for the first time, so the relative path should be safe to place in the
> non-worktree config.
>
> I do struggle with the fact that these are inconsistent across the
> two commits. It makes me think that there should only be one way to
> do it, and either the NEEDSWORK needs to be fixed now, or this line
> shouldn't include --worktree. Much of this can depend on the reason
> the worktree config exists for a submodule. I expect you have more
> context than me, so could you help me understand?
>
> Moving to a different concern I am now realizing with this config:
> What happens if a submodule moves, and then a user runs 'git checkout'
> in the superproject to move it back? How do we make this config value
> update across those movements? Is there a possibility of integrating
> with unpack_trees() to notice that a submodule has moved and hence we
> should update this config value?
I think that switching from "sub worktree to super gitdir" to "sub
gitdir to super gitdir" fixes this neatly - the gitdir-to-gitdir path
will be identical regardless of worktree, so we can set it in the main
submodule config (lose the '--worktree' arg).
This also will fix the case you describe, moving around the submodule in
the superproject's tree from checkout to checkout, as the gitdir will
not move.
Thanks a bunch for the review and sorry it took me so long to reply. v4
incoming.
- Emily
next prev parent reply other threads:[~2021-10-14 18:45 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-11 22:54 [RFC PATCH 0/4] cache parent project's gitdir in submodules Emily Shaffer
2021-06-11 22:54 ` [RFC PATCH 1/4] t7400-submodule-basic: modernize inspect() helper Emily Shaffer
2021-06-14 4:52 ` Junio C Hamano
2021-06-11 22:54 ` [RFC PATCH 2/4] introduce submodule.superprojectGitDir cache Emily Shaffer
2021-06-14 5:09 ` Junio C Hamano
2021-06-15 22:00 ` Emily Shaffer
2021-06-11 22:54 ` [RFC PATCH 3/4] submodule: cache superproject gitdir during absorbgitdirs Emily Shaffer
2021-06-14 6:18 ` Junio C Hamano
2021-06-11 22:54 ` [RFC PATCH 4/4] submodule: cache superproject gitdir during 'update' Emily Shaffer
2021-06-14 6:22 ` Junio C Hamano
2021-06-15 21:27 ` Emily Shaffer
2021-06-12 20:12 ` [RFC PATCH 0/4] cache parent project's gitdir in submodules Jacob Keller
2021-06-14 7:26 ` Junio C Hamano
2021-06-15 21:18 ` Emily Shaffer
2021-06-16 0:45 ` [PATCH v2 " Emily Shaffer
2021-06-16 0:45 ` [PATCH v2 1/4] t7400-submodule-basic: modernize inspect() helper Emily Shaffer
2021-07-27 17:12 ` Jonathan Tan
2021-08-19 17:46 ` Emily Shaffer
2021-06-16 0:45 ` [PATCH v2 2/4] introduce submodule.superprojectGitDir cache Emily Shaffer
2021-06-16 4:40 ` Junio C Hamano
2021-06-16 4:43 ` Junio C Hamano
2021-06-18 0:03 ` Emily Shaffer
2021-06-18 0:00 ` Emily Shaffer
2021-07-27 17:46 ` Jonathan Tan
2021-08-19 17:53 ` Emily Shaffer
2021-10-14 19:25 ` Ævar Arnfjörð Bjarmason
2021-06-16 0:45 ` [PATCH v2 3/4] submodule: cache superproject gitdir during absorbgitdirs Emily Shaffer
2021-06-16 0:45 ` [PATCH v2 4/4] submodule: cache superproject gitdir during 'update' Emily Shaffer
2021-07-27 17:51 ` Jonathan Tan
2021-08-19 18:02 ` Emily Shaffer
2021-08-19 20:09 ` [PATCH v3 0/4] cache parent project's gitdir in submodules Emily Shaffer
2021-08-19 20:09 ` [PATCH v3 1/4] t7400-submodule-basic: modernize inspect() helper Emily Shaffer
2021-08-19 20:09 ` [PATCH v3 2/4] introduce submodule.superprojectGitDir record Emily Shaffer
2021-08-20 0:38 ` Derrick Stolee
2021-10-13 19:36 ` Emily Shaffer
2021-09-04 17:20 ` Matheus Tavares
2021-10-13 19:39 ` Emily Shaffer
2021-08-19 20:09 ` [PATCH v3 3/4] submodule: record superproject gitdir during absorbgitdirs Emily Shaffer
2021-08-20 0:50 ` Derrick Stolee
2021-10-13 19:42 ` Emily Shaffer
2021-09-04 17:27 ` Matheus Tavares
2021-10-14 18:40 ` Emily Shaffer
2021-08-19 20:09 ` [PATCH v3 4/4] submodule: record superproject gitdir during 'update' Emily Shaffer
2021-08-20 0:59 ` Derrick Stolee
2021-10-14 18:45 ` Emily Shaffer [this message]
2021-08-19 21:56 ` [PATCH v3 0/4] cache parent project's gitdir in submodules Junio C Hamano
2021-08-20 1:09 ` Derrick Stolee
2021-10-13 18:51 ` Emily Shaffer
2021-10-14 17:12 ` Derrick Stolee
2021-10-14 18:52 ` Emily Shaffer
2021-09-04 17:50 ` Matheus Tavares Bernardino
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