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From: Glen Choo <chooglen@google.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>, git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>,
	"Atharva Raykar" <raykar.ath@gmail.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: Re: [PATCH v2 00/12] submodule: make "git submodule--helper" behave like "git submodule"
Date: Mon, 13 Jun 2022 16:09:27 -0700	[thread overview]
Message-ID: <kl6lwndk5ffc.fsf@chooglen-macbookpro.roam.corp.google.com> (raw)
In-Reply-To: <cover-v2-00.12-00000000000-20220613T220150Z-avarab@gmail.com>


Thanks! I'm happy to see this happen regardless of whose patches we use
:)

Reading the cover letter, I think it probably makes sense for this to
supersede gc/submodule-update. I haven't really looked at the changes
yet though, but I will soon.

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

>> Here's a way of breaking apart the work that makes sense to me:
>>
>> - Reuse the patches that prepare git-submodule.sh for the conversion,
>>   particularly 1-7/20 (create a "case" dispatch statement and its
>>   preceding patches).
>> - Keep my series that prepares "update", since that's the most tedious
>>   one to convert. If I don't dispatch to the "case" statement, I don't
>>   think it will even conflict with the preparatory series.
>>
>>   Some of your patches make more sense than mine, and I'll incorporate
>>   them as necessary :)
>> - Dispatch subcommands using the "case" dispatch, including "update". We
>>   might have to do this slowly if we want things to be easy to eyeball.
>> - "git rm git-submodule.sh"!
>
> Hopefully there's no stepping on toes here, but I thought I'd send
> this out now (I went back to the laptop) to avoid the duplicate work,
> since I'd already attempted combining the two, and this is the result.

Fortunately I hadn't resumed work on this yet, so it works out :)

>>> Brief commentary on my patches, details in commit messages:
>>>
>>> Ævar Arnfjörð Bjarmason (20):
>>>   git-submodule.sh: remove unused sanitize_submodule_env()
>>>   git-submodule.sh: remove unused $prefix variable
>>>   git-submodule.sh: remove unused --super-prefix logic
>>>
>>> I removed a bit more dead code here than yours.
>>>
>>>   git-submodule.sh: normalize parsing of "--branch"
>>>   git-submodule.sh: normalize parsing of --cached
>>>
>>> This & various other prep commits (hereafter "easy prep") make
>>> subsequent one-time conversions of whole cmd_*() easier.
>>>
>>>   submodule--helper: rename "absorb-git-dirs" to "absorbgitdirs"
>>>   git-submodule.sh: create a "case" dispatch statement
>>>
>>> easy prep
>>
>> This would all make sense in a preparatory series, with the exception of 
>> 3/20 git-submodule.sh: remove unused --super-prefix logic.
>>
>> We have several instances where we invoke submodule--helper directly
>> with --super-prefix, e.g. inside sync_submodule():
>>     
>>     if (flags & OPT_RECURSIVE) {
>>       struct child_process cpr = CHILD_PROCESS_INIT;
>>
>>       cpr.git_cmd = 1;
>>       cpr.dir = path;
>>       prepare_submodule_repo_env(&cpr.env_array);
>>
>>       strvec_push(&cpr.args, "--super-prefix"); /* Here */
>>
>> I even have a (as of now private) patch that replaces "update"'s
>> --recursive-prefix with --super-prefix.
>>
>> This probably wasn't caught in the tests because this only affects how
>> we calculate the submodule 'displayname'.
>
> 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.

>>>   submodule--helper: have --require-init imply --init
>>>   submodule--helper: understand --checkout, --merge and --rebase
>>>     synonyms
>>>   git-submodule doc: document the -v" option to "update"
>>>   submodule--helper: understand -v option for "update"
>>>
>>> not-so-easy prep for "cmd_update()"
>>>
>>>   git-submodule.sh: dispatch "update" to helper
>>>
>>> Full cmd_update() migration in one go.
>>
>> Yeah, and since it's not-so-easy, it probably makes sense to continue to
>> keep my series around. I'll borrow some of these patches if that's ok :)
>
> The proposal in *this series* is to leave this aside for now, but
> generally I wonder what part of it you find not-so-easy.
>
> Personally I find it much harder to carefully review the way you
> proposed to do it, i.e. to "buffer up" options that we "don't handle",
> but actually need to sort-of handle, as we'd still like to die if we
> have unknown options.
>
> Particularly since shellscript quoting etc. is a pain with that sort
> of thing, as it doesn't have any real list or key-value
> datastructures.
>
> Whereas getting it to the point where we're clearly just passing
> options as-is through beforehand, and then simply dropping the wrapper
> is, I think, much easier to review. You only need to trust or check
> that e.g. "git submodule--helper update" also supports a "--progress"
> option or whatever, and/or that we've got coverage for it.

Makes sense. I suppose we don't have to overthink the conversion because
we will have to make the leap of faith to C at some point.


  parent reply	other threads:[~2022-06-13 23:09 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       ` Glen Choo [this message]
2022-06-13 23:31         ` [PATCH v2 00/12] submodule: make "git submodule--helper" behave like "git submodule" Ævar Arnfjörð Bjarmason
2022-06-15  0:00           ` Glen Choo
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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