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From: Junio C Hamano <gitster@pobox.com>
To: Matheus Tavares Bernardino <matheus.bernardino@usp.br>
Cc: Emily Shaffer <emilyshaffer@google.com>, git <git@vger.kernel.org>
Subject: Re: [RFC PATCH 2/2] config: add 'config.superproject' file
Date: Fri, 09 Apr 2021 15:29:46 -0700	[thread overview]
Message-ID: <xmqqk0pbm6qt.fsf@gitster.g> (raw)
In-Reply-To: <CAHd-oW4VoBbZHc7cLdn0LPM531qNDGOfwPZdKiKoG4BoRFaqdg@mail.gmail.com> (Matheus Tavares Bernardino's message of "Fri, 9 Apr 2021 11:35:13 -0300")

Matheus Tavares Bernardino <matheus.bernardino@usp.br> writes:

> Hi, Emily
>
> I'm not familiar enough with this code to give a full review and I
> imagine you probably want comments more focused on the design level,
> while this is an RFC, but here are some small nitpicks I found while
> reading the patch. I Hope it helps :)
>
> On Thu, Apr 8, 2021 at 8:39 PM Emily Shaffer <emilyshaffer@google.com> wrote:
>>
>> diff --git a/Documentation/git-config.txt b/Documentation/git-config.txt
>> index 4b4cc5c5e8..a33136fb08 100644
>> --- a/Documentation/git-config.txt
>> +++ b/Documentation/git-config.txt
>> @@ -48,7 +48,7 @@ unset an existing `--type` specifier with `--no-type`.
>>
>>  When reading, the values are read from the system, global and
>>  repository local configuration files by default, and options
>> -`--system`, `--global`, `--local`, `--worktree` and
>> +`--system`, `--global`, `--superproject`, `--local`, `--worktree` and
>>  `--file <filename>` can be used to tell the command to read from only
>>  that location (see <<FILES>>).
>>
>> @@ -127,6 +127,17 @@ rather than from all available files.
>>  +
>>  See also <<FILES>>.
>>
>> +--superproject::
>> +       For writing options: write to the superproject's
>> +       `.git/config.superproject` file, even if run from a submodule of that
>> +       superproject.
>
> Hmm, I wonder what happens if a repo is both a submodule and a
> superproject (i.e. in case of nested submodules).

Another thing I am not sure about the design is that a repository
can be shared as a submodule by more than one superprojects.  The
superprojects may want their submodule checkouts at different
submodule commits, but that is something doable by having multiple
worktrees connected to a single submodule repository.

I think our design principle has been that it is perfectly OK for a
superproject to be in total control if its submodules, but
submodules should not even be aware of being used as a submodule by
a superproject, and that allows a submodule repository to be shared
by multiple superprojects.  As "write to the superproject's X file"
requires a submodule to know who THE superproject of itself is, this
feature itself (not the implementation) feels somewhat iffy.

  reply	other threads:[~2021-04-09 22:29 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-08 23:39 [RFC PATCH 0/2] share a config between submodule and superproject Emily Shaffer
2021-04-08 23:39 ` [RFC PATCH 1/2] config: rename "submodule" scope to "gitmodules" Emily Shaffer
2021-04-08 23:39 ` [RFC PATCH 2/2] config: add 'config.superproject' file Emily Shaffer
2021-04-09 11:10   ` Philip Oakley
2021-04-13 18:05     ` Emily Shaffer
2021-04-09 14:35   ` Matheus Tavares Bernardino
2021-04-09 22:29     ` Junio C Hamano [this message]
2021-04-13 19:45       ` Emily Shaffer
2021-04-13 18:48     ` Emily Shaffer
2021-04-14 10:32 ` Future structure of submodules and .git/, .git/modules/* organization Ævar Arnfjörð Bjarmason
2021-04-15 21:25   ` Emily Shaffer
2021-04-15 21:41   ` Junio C Hamano
2021-04-23  0:15 ` [RFC PATCH v2 0/4] share a config between submodule and superproject Emily Shaffer
2021-04-23  0:15   ` [RFC PATCH v2 1/4] config: rename "submodule" scope to "gitmodules" Emily Shaffer
2021-04-23  9:46     ` Phillip Wood
2021-04-23  0:15   ` [RFC PATCH v2 2/4] t1510-repo-setup: don't use exact matching on traces Emily Shaffer
2021-04-23  9:59     ` Phillip Wood
2021-04-23  0:15   ` [RFC PATCH v2 3/4] t7006-pager.sh: more lenient trace checking Emily Shaffer
2021-04-23  9:54     ` Phillip Wood
2021-04-23 12:45       ` Phillip Wood
2021-04-23  0:15   ` [RFC PATCH v2 4/4] config: add 'config.superproject' file Emily Shaffer
2021-04-23 12:08     ` Johannes Schindelin
2021-06-19  0:31   ` [PATCH v3 0/2] share a config between submodule and superproject Emily Shaffer
2021-06-19  0:31     ` [PATCH v3 1/2] config: rename "submodule" scope to "gitmodules" Emily Shaffer
2021-06-19  0:31     ` [PATCH v3 2/2] config: add 'config.superproject' file Emily Shaffer

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