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From: Sergey Organov <sorganov@gmail.com>
To: Jeff King <peff@peff.net>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
	Chris Torek <chris.torek@gmail.com>
Subject: Re: [PATCH v2 0/7] making log --first-parent imply -m
Date: Sun, 02 Aug 2020 15:59:46 +0300
Message-ID: <87mu3drynx.fsf@osv.gnss.ru> (raw)
In-Reply-To: <20200731230858.GA1461090@coredump.intra.peff.net> (Jeff King's message of "Fri, 31 Jul 2020 19:08:58 -0400")

Jeff King <peff@peff.net> writes:

> On Thu, Jul 30, 2020 at 12:41:39AM +0300, Sergey Organov wrote:
>
>> > Here's a re-roll taking into account the discussion so far:
>> >
>> >   - the escape hatch option name is flipped to "--no-diff-merges" (with
>> >     "--diff-merges" matching "-m")
>> 
>> Rather than being just a synonym for -m, is there a chance for
>> "--diff-merges" implementation to be turned to output diff to the first
>> parent only, no matter if --first-parent is active or not?
>>
>> Alternatively, may it have a parameter such as "-m parent-number" of
>> "git cherry-pick" being set to "1" by default?
>
> Yes, I agree that would be a useful feature, but I don't think it needs
> to be part of this series. It could be implemented as --diff-merges=1 to
> show only the one against the first parent, or as its own option. But we
> can add that on top.
>
>> This -m output of diffs to all the parents is in fact primary source of
>> confusion for me, even over all these mind-blowing inter-dependencies
>> between --first-parent, --cc, -c, -m, -p and what not. Who ever needs
>> these (potentially huge) diffs against other parents, anyway?
>
> I've used "-m" second-parent diffs occasionally for hunting down
> mismerges, etc, but I agree that most of the time you just want to see
> the diff against the first parent.
>
>> Introduction of this new option is a great opportunity for improvement
>> that would be a pity to miss.
>
> Adding an optional value to the flag is something we can do later. We
> would miss the opportunity for "--diff-merges" to default to
> "--diff-merges=1", but I'm not sure I'd want to do that anyway. Having
> it be consistent with "-m" seems less confusing to me, and it is already
> too late to change that.
>
> If we want an option that defaults to "1", we can give it a new name.
> The only thing that is lost now is that --diff-merges would already be
> taken. :) But I think I'd probably call such an option "--diff-parents"
> or something like that anyway.

Yeah, I see your point, thanks for considering!

What I in fact have in mind is something like:

  --diff-merges[=<parent-number>|c|cc|all]

to have a single point of definition of the needed format of merges
representation.

Then comes the question of the default. "all" is what'd make it behave
as "-m" behaves now. If it's too late for --diff-merges to have
different default, could the default possibly be a configuration
option rather than yet another command-line option?

-- Sergey

  reply index

Thread overview: 85+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-28 16:36 [PATCH 0/3] making " Jeff King
2020-07-28 16:36 ` [PATCH 1/3] log: drop "--cc implies -m" logic Jeff King
2020-07-28 16:38 ` [PATCH 2/3] revision: add "--ignore-merges" option to counteract "-m" Jeff King
2020-07-28 17:52   ` Chris Torek
2020-07-29 18:42     ` Jeff King
2020-07-28 21:01   ` Junio C Hamano
2020-07-29 18:22     ` Jeff King
2020-07-29 18:30       ` Jeff King
2020-07-29 18:53         ` Junio C Hamano
2020-07-28 16:39 ` [PATCH 3/3] log: enable "-m" automatically with "--first-parent" Jeff King
2020-07-28 16:47 ` [PATCH 0/3] making --first-parent imply -m Jeff King
2020-07-28 16:48 ` Junio C Hamano
2020-07-28 16:53   ` Jeff King
2020-07-28 16:55 ` Taylor Blau
2020-07-29 20:10 ` [PATCH v2 0/7] making log " Jeff King
2020-07-29 20:10   ` [PATCH v2 1/7] log: drop "--cc implies -m" logic Jeff King
2020-07-29 20:10   ` [PATCH v2 2/7] revision: add "--no-diff-merges" option to counteract "-m" Jeff King
2020-07-29 20:10   ` [PATCH v2 3/7] log: enable "-m" automatically with "--first-parent" Jeff King
2020-07-29 20:28     ` Junio C Hamano
2020-07-29 20:11   ` [PATCH v2 4/7] doc/git-log: move "Diff Formatting" from rev-list-options Jeff King
2020-07-29 20:56     ` Junio C Hamano
2020-07-29 21:02       ` Jeff King
2020-07-29 20:11   ` [PATCH v2 5/7] doc/git-log: drop "-r" diff option Jeff King
2020-07-29 20:12   ` [PATCH v2 6/7] doc/git-log: move "-t" into diff-options list Jeff King
2020-07-29 21:10     ` Junio C Hamano
2020-07-29 21:55       ` Jeff King
2020-07-29 20:12   ` [PATCH v2 7/7] doc/git-log: clarify handling of merge commit diffs Jeff King
2020-07-29 21:03   ` [PATCH v2 0/7] making log --first-parent imply -m Chris Torek
2020-07-29 21:41   ` Sergey Organov
2020-07-31 23:08     ` Jeff King
2020-08-02 12:59       ` Sergey Organov [this message]
2020-08-02 17:35         ` Junio C Hamano
2020-08-03 15:47           ` Sergey Organov
2020-08-03 16:35             ` Junio C Hamano
2020-08-03 16:41               ` Sergey Organov
2020-08-03 17:21                 ` Junio C Hamano
2020-08-03 20:25                   ` Sergey Organov
2020-08-03 20:58                     ` Jeff King
2020-08-03 21:16                       ` Sergey Organov
2020-08-03 18:08             ` Jeff King
2020-08-03 20:00               ` Sergey Organov
2020-08-03 20:55                 ` Jeff King
2020-08-03 21:18                   ` Sergey Organov
2020-08-04 17:50               ` Sergey Organov
2020-08-04 19:42                 ` Junio C Hamano
2020-08-04 20:00                   ` Jeff King
2020-08-04 20:55                     ` Sergey Organov
2020-08-04 21:22                       ` Jeff King
2020-08-04 21:55                         ` Junio C Hamano
2020-08-04 22:06                           ` Sergey Organov
2020-08-04 22:14                             ` Jeff King
2020-08-04 22:49                               ` Junio C Hamano
2020-08-07  8:26                                 ` Jeff King
2020-08-07  9:25                                   ` Sergey Organov
2020-08-07 17:43                                   ` Junio C Hamano
2020-08-07 17:52                                     ` Sergey Organov
2020-08-07 19:01                                       ` Junio C Hamano
2020-08-07 19:12                                         ` Sergey Organov
2020-08-07 19:20                                           ` Jeff King
2020-08-07 19:28                                             ` Sergey Organov
2020-08-07 19:46                                           ` Junio C Hamano
2020-08-07 20:29                                             ` Sergey Organov
2020-08-07 20:39                                               ` Junio C Hamano
2020-08-07 21:08                                                 ` Sergey Organov
2020-08-07 21:54                                                   ` Junio C Hamano
2020-08-07 23:07                                                     ` Sergey Organov
2020-08-04 22:53                               ` Sergey Organov
2020-08-04 21:21                     ` Sergey Organov
2020-08-04 21:26                       ` Jeff King
2020-08-04 19:58                 ` Jeff King
2020-08-04 20:56                   ` Sergey Organov
2020-08-04 21:25                     ` Jeff King
2020-08-04 21:41                       ` Sergey Organov
2020-08-04 22:07                         ` Jeff King
2020-08-04 22:15                           ` Sergey Organov
2020-08-04 21:27                     ` Junio C Hamano
2020-08-04 21:44                       ` Sergey Organov
2020-08-04 21:58                   ` Sergey Organov
2020-08-04 22:08                     ` Jeff King
2020-08-04 22:26                       ` [PATCH] revision: fix die() message for "--unpacked=" Sergey Organov
2020-08-05  0:03                         ` Junio C Hamano
2020-08-05 15:37                   ` [PATCH v2 0/7] making log --first-parent imply -m Sergey Organov
2020-08-05 16:05                     ` Junio C Hamano
2020-08-05 17:55                       ` Sergey Organov
2020-08-05 19:24                         ` Junio C Hamano
2020-08-05 20:27                           ` Sergey Organov

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