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From: Glen Choo <chooglen@google.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
	Atharva Raykar <raykar.ath@gmail.com>
Subject: Re: [PATCH v2 00/12] submodule: make "git submodule--helper" behave like "git submodule"
Date: Tue, 14 Jun 2022 17:00:08 -0700	[thread overview]
Message-ID: <kl6lsfo66bjr.fsf@chooglen-macbookpro.roam.corp.google.com> (raw)
In-Reply-To: <220614.86pmjcyv4u.gmgdl@evledraar.gmail.com>

Ævar Arnfjörð Bjarmason <avarab@gmail.com> writes:

>>> [...]
>>> This is still in this series as 02/12. I think you've misunderstood
>>> that code, it *is* invoking "git submodule--helper" with
>>> "--super-prefix", but the option is passed as:
>>>
>>>     git --super-prefix <path> submodule--helper
>>>
>>> And not as:
>>>
>>>     git submodule--helper --super-prefix <path>
>>>
>>> This is thus handled by other code before builtin/submodule--helper.c,
>>> and it doesn't need to handle it.
>>>
>>> But anyway, this is confusing, so I updated the commit message (seen
>>> in the range-diff below)>
>>
>> Ah that's right, I forgot that we have to pass it to "git" directly.
>> Thanks.
>>
>> I wonder why we ever needed this. 89c8626557 (submodule helper: support
>> super prefix, 2016-12-08) doesn't really explain it, so it looks like
>> I'll have to dig around the ML.
>
> It was needed, but not after b3c5f5cb048 (submodule: move core
> cmd_update() logic to C, 2022-03-15) as my 02/12 discusses.
>
> As a quick test try to check out b3c5f5cb048 and apply this change:
>
>     -#define SUPPORT_SUPER_PREFIX (1<<0)
>     +#define SUPPORT_SUPER_PREFIX 0
>
> You'll find that t7406-submodule-update.sh passes, but check out its
> parent (which is a commit of yours) and it'll fail, as we'll then emit
> output like:
>
>     -Submodule path '../super': checked out 'e1c658656b91df52a4634fbffeaa739807ce3521'
>     +Submodule path 'super': checked out 'e1c658656b91df52a4634fbffeaa739807ce3521'
>
> So this is just one of the things that were overly complex in
> git-submodule--helper because parts of it had to bridge the gap between
> *.sh and *.c land, but once we moved more parts to C we ended up getting
> that for free.

Ah yes you are right, as of b3c5f5cb048 we never pass `--super-prefix`
to "git submodule" any more. Great!

I also remember that when I was reading the patch that became
b3c5f5cb048 (submodule: move core cmd_update() logic to C, 2022-03-15),
I noted (internally) that we used `prefix` to set "--recursive-prefix",
which was unusual because `prefix` is usually mapped to
"--super-prefix".

I have a patch to replace "--recursive-prefix" with "--super-prefix",
but it doesn't make sense for that patch to be included in this series
(it's preparation for something else entirely, and it won't make this
series any cleaner.)

  reply	other threads:[~2022-06-15  0:00 UTC|newest]

Thread overview: 90+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-10  0:26 [PATCH 0/8] [RFC] submodule update: parse all options in C Glen Choo via GitGitGadget
2022-06-10  0:26 ` [PATCH 1/8] submodule update: remove intermediate parsing Glen Choo via GitGitGadget
2022-06-10  0:26 ` [PATCH 2/8] submodule update: pass options containing "[no-]" Glen Choo via GitGitGadget
2022-06-10  0:26 ` [PATCH 3/8] submodule update: pass options with stuck forms Glen Choo via GitGitGadget
2022-06-10  0:26 ` [PATCH 4/8] submodule update: pass --require-init and --init Glen Choo via GitGitGadget
2022-06-10  0:26 ` [PATCH 5/8] submodule--helper update: use one param per type Glen Choo via GitGitGadget
2022-06-10  0:26 ` [PATCH 6/8] submodule update: remove -v, pass --quiet Glen Choo via GitGitGadget
2022-06-10  0:26 ` [PATCH 7/8] submodule update: stop parsing options in .sh Glen Choo via GitGitGadget
2022-06-10  0:26 ` [PATCH 8/8] submodule update: remove never-used expansion Glen Choo via GitGitGadget
2022-06-10  2:01 ` [RFC PATCH 00/20] submodule: remove git-submodule.sh, create bare builtin/submodule.c Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 01/20] git-submodule.sh: remove unused sanitize_submodule_env() Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 02/20] git-submodule.sh: remove unused $prefix variable Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 03/20] git-submodule.sh: remove unused --super-prefix logic Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 04/20] git-submodule.sh: normalize parsing of "--branch" Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 05/20] git-submodule.sh: normalize parsing of --cached Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 06/20] submodule--helper: rename "absorb-git-dirs" to "absorbgitdirs" Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 07/20] git-submodule.sh: create a "case" dispatch statement Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 08/20] submodule--helper: pretend to be "git submodule" in "-h" output Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 09/20] git-submodule.sh: dispatch "sync" to helper Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 10/20] git-submodule.sh: dispatch directly " Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 11/20] git-submodule.sh: dispatch "foreach" " Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 12/20] submodule--helper: have --require-init imply --init Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 13/20] submodule--helper: understand --checkout, --merge and --rebase synonyms Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 14/20] git-submodule doc: document the -v" option to "update" Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 15/20] submodule--helper: understand -v option for "update" Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 16/20] git-submodule.sh: dispatch "update" to helper Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 17/20] git-submodule.sh: use "$quiet", not "$GIT_QUIET" Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 18/20] git-submodule.sh: simplify parsing loop Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 19/20] submodule: make it a built-in, remove git-submodule.sh Ævar Arnfjörð Bjarmason
2022-06-10  2:01   ` [RFC PATCH 20/20] submodule: add a subprocess-less submodule.useBuiltin setting Ævar Arnfjörð Bjarmason
2022-06-13 19:07   ` [RFC PATCH 00/20] submodule: remove git-submodule.sh, create bare builtin/submodule.c Glen Choo
2022-06-13 22:38     ` [PATCH v2 00/12] submodule: make "git submodule--helper" behave like "git submodule" Ævar Arnfjörð Bjarmason
2022-06-13 22:38       ` [PATCH v2 01/12] git-submodule.sh: remove unused sanitize_submodule_env() Ævar Arnfjörð Bjarmason
2022-06-13 22:38       ` [PATCH v2 02/12] git-submodule.sh: remove unused $prefix var and --super-prefix Ævar Arnfjörð Bjarmason
2022-06-13 22:38       ` [PATCH v2 03/12] git-submodule.sh: make "$cached" variable a boolean Ævar Arnfjörð Bjarmason
2022-06-13 22:38       ` [PATCH v2 04/12] git-submodule.sh: remove unused top-level "--branch" argument Ævar Arnfjörð Bjarmason
2022-06-15  0:10         ` Glen Choo
2022-06-13 22:38       ` [PATCH v2 05/12] submodule--helper: have --require-init imply --init Ævar Arnfjörð Bjarmason
2022-06-15  0:19         ` Glen Choo
2022-06-13 22:38       ` [PATCH v2 06/12] submodule update: remove "-v" option Ævar Arnfjörð Bjarmason
2022-06-15  0:29         ` Glen Choo
2022-06-13 22:38       ` [PATCH v2 07/12] submodule--helper: rename "absorb-git-dirs" to "absorbgitdirs" Ævar Arnfjörð Bjarmason
2022-06-13 22:38       ` [PATCH v2 08/12] submodule--helper: report "submodule" as our name in "-h" output Ævar Arnfjörð Bjarmason
2022-06-15  3:34         ` Glen Choo
2022-06-15  4:01         ` Glen Choo
2022-06-15  9:42           ` Ævar Arnfjörð Bjarmason
2022-06-13 22:39       ` [PATCH v2 09/12] submodule--helper: understand --checkout, --merge and --rebase synonyms Ævar Arnfjörð Bjarmason
2022-06-13 22:39       ` [PATCH v2 10/12] submodule--helper: eliminate internal "--update" option Ævar Arnfjörð Bjarmason
2022-06-15 16:52         ` Glen Choo
2022-06-13 22:39       ` [PATCH v2 11/12] git-submodule.sh: use "$quiet", not "$GIT_QUIET" Ævar Arnfjörð Bjarmason
2022-06-13 22:39       ` [PATCH v2 12/12] git-sh-setup.sh: remove "say" function, change last users Ævar Arnfjörð Bjarmason
2022-06-15 16:58         ` Glen Choo
2022-06-13 23:09       ` [PATCH v2 00/12] submodule: make "git submodule--helper" behave like "git submodule" Glen Choo
2022-06-13 23:31         ` Ævar Arnfjörð Bjarmason
2022-06-15  0:00           ` Glen Choo [this message]
2022-06-15 18:42       ` Glen Choo
2022-06-22 14:27       ` [PATCH v3 " Ævar Arnfjörð Bjarmason
2022-06-22 14:27         ` [PATCH v3 01/12] git-submodule.sh: remove unused sanitize_submodule_env() Ævar Arnfjörð Bjarmason
2022-06-22 14:27         ` [PATCH v3 02/12] git-submodule.sh: remove unused $prefix var and --super-prefix Ævar Arnfjörð Bjarmason
2022-06-22 23:43           ` Glen Choo
2022-06-24 15:07             ` Ævar Arnfjörð Bjarmason
2022-06-24 16:48               ` Glen Choo
2022-06-22 14:27         ` [PATCH v3 03/12] git-submodule.sh: make the "$cached" variable a boolean Ævar Arnfjörð Bjarmason
2022-06-22 14:27         ` [PATCH v3 04/12] git-submodule.sh: remove unused top-level "--branch" argument Ævar Arnfjörð Bjarmason
2022-06-22 14:28         ` [PATCH v3 05/12] submodule--helper: have --require-init imply --init Ævar Arnfjörð Bjarmason
2022-06-22 14:28         ` [PATCH v3 06/12] submodule update: remove "-v" option Ævar Arnfjörð Bjarmason
2022-06-22 14:28         ` [PATCH v3 07/12] submodule--helper: rename "absorb-git-dirs" to "absorbgitdirs" Ævar Arnfjörð Bjarmason
2022-06-22 14:28         ` [PATCH v3 08/12] submodule--helper: report "submodule" as our name in some "-h" output Ævar Arnfjörð Bjarmason
2022-06-22 18:28           ` Glen Choo
2022-06-22 14:28         ` [PATCH v3 09/12] submodule--helper: understand --checkout, --merge and --rebase synonyms Ævar Arnfjörð Bjarmason
2022-06-22 18:57           ` Glen Choo
2022-06-22 19:04             ` Glen Choo
2022-06-22 14:28         ` [PATCH v3 10/12] submodule--helper: eliminate internal "--update" option Ævar Arnfjörð Bjarmason
2022-06-22 14:28         ` [PATCH v3 11/12] git-submodule.sh: use "$quiet", not "$GIT_QUIET" Ævar Arnfjörð Bjarmason
2022-06-22 14:28         ` [PATCH v3 12/12] git-sh-setup.sh: remove "say" function, change last users Ævar Arnfjörð Bjarmason
2022-06-24  3:39         ` [PATCH v3 00/12] submodule: make "git submodule--helper" behave like "git submodule" Glen Choo
2022-06-28 10:05         ` [PATCH v4 " Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 01/12] git-submodule.sh: remove unused sanitize_submodule_env() Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 02/12] git-submodule.sh: remove unused $prefix variable Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 03/12] git-submodule.sh: make the "$cached" variable a boolean Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 04/12] git-submodule.sh: remove unused top-level "--branch" argument Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 05/12] submodule--helper: have --require-init imply --init Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 06/12] submodule update: remove "-v" option Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 07/12] submodule--helper: rename "absorb-git-dirs" to "absorbgitdirs" Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 08/12] submodule--helper: report "submodule" as our name in some "-h" output Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 09/12] submodule--helper: understand --checkout, --merge and --rebase synonyms Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 10/12] submodule--helper: eliminate internal "--update" option Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 11/12] git-submodule.sh: use "$quiet", not "$GIT_QUIET" Ævar Arnfjörð Bjarmason
2022-06-28 10:05           ` [PATCH v4 12/12] git-sh-setup.sh: remove "say" function, change last users Ævar Arnfjörð Bjarmason
2022-06-28 16:52           ` [PATCH v4 00/12] submodule: make "git submodule--helper" behave like "git submodule" Glen Choo

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