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From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: Johannes Schindelin via GitGitGadget <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, Eric Wong <e@80x24.org>,
	Johannes Schindelin <johannes.schindelin@gmx.de>
Subject: Re: [PATCH v2 0/7] Drop support for git rebase --preserve-merges
Date: Wed, 01 Sep 2021 15:37:06 +0200	[thread overview]
Message-ID: <87r1e8v26x.fsf@evledraar.gmail.com> (raw)
In-Reply-To: <pull.195.v2.git.1630497435.gitgitgadget@gmail.com>


On Wed, Sep 01 2021, Johannes Schindelin via GitGitGadget wrote:

> In 427c3bd28ab (rebase: deprecate --preserve-merges, 2019-03-11) (which was
> included in v2.22.0), we officially deprecated the --preserve-merges
> backend. Over two years later, it is time to drop that backend, and here is
> a patch series that does just that.
>
> Changes since v1:
>
>  * Rebased onto v2.33.0

I'm very much in favor if this series.

I independently came up with pretty much the same at the beginning of
last month before finding your v1 in the list archive. The comments I
left inline are based on the diff between our two versions, i.e. I found
some spots you missed (and your version has spots I missed).

You're also leaving behind a comment in builtin/rebase.c referring to
PRESERVE_MERGES. Perhaps we should just turn that into an "else if"
while we're at it (the "ignore-space-change" argument won't need
wrapping anymore then):

builtin/rebase.c-       } else {
builtin/rebase.c:               /* REBASE_MERGE and PRESERVE_MERGES */
builtin/rebase.c-               if (ignore_whitespace) {
builtin/rebase.c-                       string_list_append(&strategy_options,
builtin/rebase.c-                                          "ignore-space-change");
builtin/rebase.c-               }
builtin/rebase.c-       }

I do find the left-behind "enum rebase_type" rather unpleasant, i.e. we
have a REBASE_UNSPECIFIED during the initial parse_options() phase, and
after that just REBASE_{APPLY,MERGE}, but some of those codepaths use
switch(), some just check on or the other, and it's not immediately
obvious where we are in the control flow. Ideally we'd take care of
parsing out the option(s) early, and could just have an "int
rebase_apply" in the struct to clearly indicate the rarer cases where we
take the REBASE_APPLY path.

But I wasn't able to make that work with some quick hacking, and in any
case that can be left as a cleanup for later.

Ideally with the code comments I left addressed, but either way the
correctness of the end result isn't affected in terms of what the
program ends up doing:

Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>

  parent reply	other threads:[~2021-09-01 13:46 UTC|newest]

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-23 20:50 [PATCH 0/8] Drop support for git rebase --preserve-merges Johannes Schindelin via GitGitGadget
2019-11-23 20:50 ` [PATCH 1/8] t5520: do not use `pull.rebase=preserve` Johannes Schindelin via GitGitGadget
2019-11-23 20:50 ` [PATCH 2/8] remote: warn about unhandled branch.<name>.rebase values Johannes Schindelin via GitGitGadget
2019-11-23 20:50 ` [PATCH 3/8] tests: stop testing `git rebase --preserve-merges` Johannes Schindelin via GitGitGadget
2019-11-23 20:50 ` [PATCH 4/8] pull: remove support for `--rebase=preserve` Johannes Schindelin via GitGitGadget
2019-11-23 20:50 ` [PATCH 5/8] rebase: drop support for `--preserve-merges` Johannes Schindelin via GitGitGadget
2019-11-23 20:50 ` [PATCH 6/8] git-svn: " Johannes Schindelin via GitGitGadget
2019-11-23 22:08   ` Eric Wong
2019-11-24 21:29     ` Johannes Schindelin
2019-11-25  3:15       ` Eric Wong
2019-11-23 20:50 ` [PATCH 7/8] rebase: drop the internal `rebase--interactive` command Johannes Schindelin via GitGitGadget
2019-11-23 20:50 ` [PATCH 8/8] remote: no longer claim that branch.*.rebase=preserve is a thing Johannes Schindelin via GitGitGadget
2021-09-01 11:57 ` [PATCH v2 0/7] Drop support for git rebase --preserve-merges Johannes Schindelin via GitGitGadget
2021-09-01 11:57   ` [PATCH v2 1/7] t5520: do not use `pull.rebase=preserve` Johannes Schindelin via GitGitGadget
2021-09-01 11:57   ` [PATCH v2 2/7] remote: warn about unhandled branch.<name>.rebase values Johannes Schindelin via GitGitGadget
2021-09-01 11:57   ` [PATCH v2 3/7] tests: stop testing `git rebase --preserve-merges` Johannes Schindelin via GitGitGadget
2021-09-01 13:26     ` Ævar Arnfjörð Bjarmason
2021-09-01 11:57   ` [PATCH v2 4/7] pull: remove support for `--rebase=preserve` Johannes Schindelin via GitGitGadget
2021-09-01 11:57   ` [PATCH v2 5/7] rebase: drop support for `--preserve-merges` Johannes Schindelin via GitGitGadget
2021-09-01 12:21     ` Ævar Arnfjörð Bjarmason
2021-09-02 13:54       ` Johannes Schindelin
2021-09-02 14:11         ` Ævar Arnfjörð Bjarmason
2021-09-01 13:33     ` Ævar Arnfjörð Bjarmason
2021-09-02 13:59       ` Johannes Schindelin
2021-09-02 14:16         ` Ævar Arnfjörð Bjarmason
2021-09-02 14:28     ` Ævar Arnfjörð Bjarmason
2021-09-02 14:34     ` Ævar Arnfjörð Bjarmason
2021-09-02 14:56       ` Ævar Arnfjörð Bjarmason
2021-09-02 15:34         ` Ævar Arnfjörð Bjarmason
2021-09-04 19:41       ` Johannes Schindelin
2021-09-05  7:32         ` Ævar Arnfjörð Bjarmason
2021-09-05 22:36           ` Junio C Hamano
2021-09-06 10:15     ` Phillip Wood
2021-09-07 12:32       ` Johannes Schindelin
2021-09-07 15:31         ` Phillip Wood
2021-09-07 19:44           ` Johannes Schindelin
2021-09-01 11:57   ` [PATCH v2 6/7] git-svn: " Johannes Schindelin via GitGitGadget
2021-09-01 13:25     ` Ævar Arnfjörð Bjarmason
2021-09-02 14:00       ` Johannes Schindelin
2021-09-02 14:08       ` Johannes Schindelin
2021-09-01 11:57   ` [PATCH v2 7/7] rebase: drop the internal `rebase--interactive` command Johannes Schindelin via GitGitGadget
2021-09-06 10:10     ` Phillip Wood
2021-09-07 12:39       ` Johannes Schindelin
2021-09-01 13:37   ` Ævar Arnfjörð Bjarmason [this message]
2021-09-02 14:16     ` [PATCH v2 0/7] Drop support for git rebase --preserve-merges Johannes Schindelin
2021-09-02 14:51       ` Ævar Arnfjörð Bjarmason
2021-09-01 22:25   ` Junio C Hamano
2021-09-02 14:18     ` Johannes Schindelin
2021-09-02 20:06       ` Johannes Sixt
2021-09-07 17:33         ` Johannes Schindelin
2021-09-07 22:48           ` Elijah Newren
2021-09-10 12:08             ` Johannes Schindelin
2021-09-10 17:16               ` Elijah Newren
2021-09-13 11:24                 ` merge-ort and --rebase-merges, was " Johannes Schindelin
2021-09-13 15:53                   ` Elijah Newren
2021-09-06  6:58     ` Ævar Arnfjörð Bjarmason
2021-09-07 18:27       ` Junio C Hamano
2021-09-07 19:52         ` Ævar Arnfjörð Bjarmason
2021-09-04 22:30   ` Alban Gruin
2021-09-06 10:17     ` Phillip Wood
2021-09-07 12:48     ` Johannes Schindelin
2021-09-07 21:05   ` [PATCH v3 00/11] " Johannes Schindelin via GitGitGadget
2021-09-07 21:05     ` [PATCH v3 01/11] t5520: do not use `pull.rebase=preserve` Johannes Schindelin via GitGitGadget
2021-09-07 21:05     ` [PATCH v3 02/11] remote: warn about unhandled branch.<name>.rebase values Johannes Schindelin via GitGitGadget
2021-09-07 21:05     ` [PATCH v3 03/11] tests: stop testing `git rebase --preserve-merges` Johannes Schindelin via GitGitGadget
2021-09-07 21:05     ` [PATCH v3 04/11] pull: remove support for `--rebase=preserve` Johannes Schindelin via GitGitGadget
2021-09-07 21:05     ` [PATCH v3 05/11] rebase: drop support for `--preserve-merges` Johannes Schindelin via GitGitGadget
2021-09-10 14:53       ` Ævar Arnfjörð Bjarmason
2022-07-21 19:02       ` re-mentioning --preserve-merges in the docs (was: [PATCH v3 05/11] rebase: drop support for `--preserve-merges`) Ævar Arnfjörð Bjarmason
2022-07-21 20:15         ` re-mentioning --preserve-merges in the docs Junio C Hamano
2022-07-29 13:24           ` Johannes Schindelin
2021-09-07 21:05     ` [PATCH v3 06/11] git-svn: drop support for `--preserve-merges` Johannes Schindelin via GitGitGadget
2021-09-07 21:05     ` [PATCH v3 07/11] rebase: drop the internal `rebase--interactive` command Johannes Schindelin via GitGitGadget
2021-09-07 21:05     ` [PATCH v3 08/11] rebase: remove obsolete code comment Johannes Schindelin via GitGitGadget
2021-09-07 21:05     ` [PATCH v3 09/11] rebase: stop mentioning the -p option in comments Johannes Schindelin via GitGitGadget
2021-09-07 21:05     ` [PATCH v3 10/11] rebase: remove a no-longer-used function Johannes Schindelin via GitGitGadget
2021-09-07 21:05     ` [PATCH v3 11/11] sequencer: restrict scope of a formerly public function Johannes Schindelin via GitGitGadget
2021-09-08  1:30     ` [PATCH v3 00/11] Drop support for git rebase --preserve-merges Ævar Arnfjörð Bjarmason

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