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From: Sergey Organov <sorganov@gmail.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: "Jeff King" <peff@peff.net>,
	"Philip Oakley" <philipoakley@iee.email>,
	"Elijah Newren" <newren@gmail.com>,
	"Felipe Contreras" <felipe.contreras@gmail.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
	"Alex Henrie" <alexhenrie24@gmail.com>,
	git@vger.kernel.org
Subject: Re: [PATCH 6/6] diff-merges: let -m imply -p
Date: Mon, 17 May 2021 15:57:11 +0300	[thread overview]
Message-ID: <87eee5v7q0.fsf@osv.gnss.ru> (raw)
In-Reply-To: <xmqqo8dhool7.fsf@gitster.g> (Junio C. Hamano's message of "Tue, 11 May 2021 13:56:36 +0900")

Junio C Hamano <gitster@pobox.com> writes:

> Junio C Hamano <gitster@pobox.com> writes:
>
>> Sergey Organov <sorganov@gmail.com> writes:
>>
>>> Fix long standing inconsistency between -c/--cc that do imply -p, on
>>> one side, and -m that did not imply -p, on the other side.
>>>
>>> After this patch
>>>
>>>   git log -m
>>>
>>> will start to produce diffs without need to provide -p as well, that
>>> improves both consistency and usability. It gets even more useful if
>>> one sets "log.diffMerges" configuration variable to "first-parent" to
>>> force -m produce usual diff with respect to first parent only.
>>
>> Please make sure that you clearly state that you do not blindly
>> force --patch output in the proposed log message.  Explicitly
>> mentioning that "git log --stat -m" would not give a patch but just
>> diffstat would be assuring.
>
> Also, avoid "-p" in the title.  "let -m imply diff generation" might
> be a good compromise.
>
> What --cc/-c implies is to show some kind of diff for merges
> (dense_combined_merges, combine_merges and !ignore_merges are the
> members of the revs field that controls how merge commits) and they
> ask for specific kind of diff is shown.  So "-c/--cc imply -p" is
> quite wrong (you never get straight --patch output for merges when
> you give -c/--cc---you get combined diff).  In a sense, you could
> say -c/--cc implies -m (i.e. do show some kind of diff for merges).
>
> Taken together, perhaps:
>
>     Subject: diff: let -m imply diff generation
>
>     The "-c/--cc" options to "git log" asks for merges to be shown
>     with patch-like output, implicitly enabling the "-m" option
>     (which is used to tell "do not ignore merge commits when showing
>     patches).  However, the opposite is not true; giving "-m" alone
>     does not tell "git log" that the user wants some form of patches.
>     
>     Make "-m" imply "we want some form of diff output", so that "git
>     log -m" would behave identically to "git log -m -p".  When the
>     user explicitly asks for what kind of diff output is desired,
>     e.g. "git log -m --stat", there is no need to imply anything,
>     specifically, do NOT blindly turn on the "-p: option to turn it
>     into "git log -m --stat -p:.
>
> or something like that.

While working on this, I've added more tests and explanations to the
next re-roll as I've promised, but I didn't change the subject nor did I
try to explain that much, as my original subject is consistent with
current Git documentation, concise, and straight to the point.

"<opt> implies -p" -- that's how current Git manual describes the
behavior, and that's how I described it in these patches. Whatever
"imply" actually means for -c/--cc, it now means for -m as well, and
that's the essence of the patches, so I stand for my original subject.

I think that if we realize that "<opt> implies -p" is not precise enough
description of actual behavior, it should be a separate topic of
documentation improvements, and doesn't belong to these series anyway.

Thanks,
-- Sergey Organov

  parent reply	other threads:[~2021-05-17 12:57 UTC|newest]

Thread overview: 129+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-29  1:44 Why doesn't `git log -m` imply `-p`? Alex Henrie
2021-04-29  3:22 ` Junio C Hamano
2021-04-29 12:38   ` Sergey Organov
2021-04-29 15:25     ` Alex Henrie
2021-04-29 16:35       ` Sergey Organov
2021-04-29 17:24         ` Alex Henrie
2021-04-29 19:07           ` Sergey Organov
2021-05-04 20:09       ` Felipe Contreras
2021-05-04 20:34         ` Sergey Organov
2021-04-29 23:27     ` Junio C Hamano
2021-04-30  4:50       ` Junio C Hamano
2021-04-30 14:00         ` Sergey Organov
2021-05-01  0:41           ` Junio C Hamano
2021-05-03 17:42             ` Sergey Organov
2021-05-04  1:15               ` Junio C Hamano
2021-05-04  9:10                 ` Sergey Organov
2021-05-04 12:38                   ` Junio C Hamano
2021-05-04 14:18                     ` Sergey Organov
2021-05-05  0:20                       ` Junio C Hamano
2021-05-05 13:43                         ` Sergey Organov
2021-05-06  0:27                           ` Junio C Hamano
2021-05-06 12:59                             ` Sergey Organov
2021-05-06 20:29                               ` Junio C Hamano
2021-05-06 20:48                                 ` Sergey Organov
2021-05-07  1:31                                   ` Alex Henrie
2021-05-10 12:11 ` Sergey Organov
2021-05-10 16:56   ` Alex Henrie
2021-05-10 15:34 ` [PATCH 0/6] diff-merges: let -m imply -p Sergey Organov
2021-05-10 15:34   ` [PATCH 1/6] t4013: add test for "git diff-index -m" Sergey Organov
2021-05-10 15:34   ` [PATCH 2/6] diff-merges: move specific diff-index "-m" handling to diff-index Sergey Organov
2021-05-11  4:09     ` Junio C Hamano
2021-05-11  5:23       ` Junio C Hamano
2021-05-11  5:41         ` Junio C Hamano
2021-05-11 13:43       ` Sergey Organov
2021-05-10 15:34   ` [PATCH 3/6] git-svn: stop passing "-m" to "git rev-list" Sergey Organov
2021-05-10 15:34   ` [PATCH 4/6] stash list: stop passing "-m" to "git list" Sergey Organov
2021-05-10 15:34   ` [PATCH 5/6] diff-merges: rename "combined_imply_patch" to "merges_imply_patch" Sergey Organov
2021-05-10 15:34   ` [PATCH 6/6] diff-merges: let -m imply -p Sergey Organov
2021-05-11  4:14     ` Junio C Hamano
2021-05-11  4:56       ` Junio C Hamano
2021-05-11 14:03         ` Sergey Organov
2021-05-11 17:13           ` Alex Henrie
2021-05-11 18:46             ` Sergey Organov
2021-05-11 19:53               ` Alex Henrie
2021-05-11 20:27                 ` Sergey Organov
2021-05-12  1:16                   ` Felipe Contreras
2021-05-11 18:31           ` Elijah Newren
2021-05-11 19:00             ` Sergey Organov
2021-05-11 19:56               ` Elijah Newren
2021-05-11 20:32                 ` Sergey Organov
2021-05-11 20:43             ` Junio C Hamano
2021-05-11 21:38               ` Sergey Organov
2021-05-11 23:40                 ` Junio C Hamano
2021-05-19 21:44             ` Jonathan Nieder
2021-05-20 20:39               ` Sergey Organov
2021-05-21 18:14                 ` Felipe Contreras
2021-05-11 16:29         ` Sergey Organov
2021-05-17 12:57         ` Sergey Organov [this message]
2021-05-11 16:30       ` Sergey Organov
2021-05-19 21:48     ` Jonathan Nieder
2021-05-19 22:03       ` Sergey Organov
2021-05-19 23:32       ` Junio C Hamano
2021-05-20 13:14         ` Sergey Organov
2021-05-20 18:50           ` Jonathan Nieder
2021-05-20 19:38             ` Sergey Organov
2021-05-17 15:58 ` [PATCH v1 0/9] " Sergey Organov
2021-05-17 15:58   ` [PATCH v1 1/9] t4013: test that "-m" alone has no effect in "git log" Sergey Organov
2021-05-17 15:58   ` [PATCH v1 2/9] t4013: test "git -m --raw" Sergey Organov
2021-05-18  3:27     ` Bagas Sanjaya
2021-05-18 12:13       ` Sergey Organov
2021-05-17 15:58   ` [PATCH v1 3/9] t4013: test "git -m --stat" Sergey Organov
2021-05-17 15:58   ` [PATCH v1 4/9] t4013: test "git diff-index -m" Sergey Organov
2021-05-17 15:58   ` [PATCH v1 5/9] diff-merges: move specific diff-index "-m" handling to diff-index Sergey Organov
2021-05-17 20:10     ` Junio C Hamano
2021-05-17 20:24       ` Sergey Organov
2021-05-17 20:29     ` Junio C Hamano
2021-05-17 21:00       ` Sergey Organov
2021-05-17 15:58   ` [PATCH v1 6/9] git-svn: stop passing "-m" to "git rev-list" Sergey Organov
2021-05-17 15:58   ` [PATCH v1 7/9] stash list: stop passing "-m" to "git list" Sergey Organov
2021-05-17 15:58   ` [PATCH v1 8/9] diff-merges: rename "combined_imply_patch" to "merges_imply_patch" Sergey Organov
2021-05-17 15:58   ` [PATCH v1 9/9] diff-merges: let "-m" imply "-p" Sergey Organov
2021-05-17 19:51   ` [PATCH v1 0/9] diff-merges: let -m imply -p Junio C Hamano
2021-05-17 20:11     ` Sergey Organov
2021-05-18  3:18   ` Bagas Sanjaya
2021-05-18 12:03     ` Sergey Organov
2021-05-18 12:17     ` Sergey Organov
2021-05-18 14:17   ` Junio C Hamano
2021-05-18 15:52     ` Sergey Organov
2021-05-19 11:45 ` [PATCH v2 " Sergey Organov
2021-05-19 11:45   ` [PATCH v2 1/9] t4013: test that "-m" alone has no effect in "git log" Sergey Organov
2021-05-19 11:45   ` [PATCH v2 2/9] t4013: test "git log -m --raw" Sergey Organov
2021-05-19 11:45   ` [PATCH v2 3/9] t4013: test "git log -m --stat" Sergey Organov
2021-05-19 11:45   ` [PATCH v2 4/9] t4013: test "git diff-index -m" Sergey Organov
2021-05-19 11:45   ` [PATCH v2 5/9] diff-merges: move specific diff-index "-m" handling to diff-index Sergey Organov
2021-05-19 11:45   ` [PATCH v2 6/9] git-svn: stop passing "-m" to "git rev-list" Sergey Organov
2021-05-19 11:45   ` [PATCH v2 7/9] stash list: stop passing "-m" to "git log" Sergey Organov
2021-05-19 11:45   ` [PATCH v2 8/9] diff-merges: rename "combined_imply_patch" to "merges_imply_patch" Sergey Organov
2021-05-19 11:45   ` [PATCH v2 9/9] diff-merges: let "-m" imply "-p" Sergey Organov
2021-05-20 21:46 ` [PATCH v3 00/10] diff-merges: let -m imply -p Sergey Organov
2021-05-20 21:46   ` [PATCH v3 01/10] t4013: test that "-m" alone has no effect in "git log" Sergey Organov
2021-05-20 21:46   ` [PATCH v3 02/10] t4013: test "git log -m --raw" Sergey Organov
2021-05-20 21:46   ` [PATCH v3 03/10] t4013: test "git log -m --stat" Sergey Organov
2021-05-20 21:46   ` [PATCH v3 04/10] t4013: test "git diff-tree -m" Sergey Organov
2021-05-20 21:46   ` [PATCH v3 05/10] t4013: test "git diff-index -m" Sergey Organov
2021-05-20 21:46   ` [PATCH v3 06/10] diff-merges: move specific diff-index "-m" handling to diff-index Sergey Organov
2021-05-20 21:47   ` [PATCH v3 07/10] git-svn: stop passing "-m" to "git rev-list" Sergey Organov
2021-05-20 21:47   ` [PATCH v3 08/10] stash list: stop passing "-m" to "git log" Sergey Organov
2021-05-20 21:47   ` [PATCH v3 09/10] diff-merges: rename "combined_imply_patch" to "merges_imply_patch" Sergey Organov
2021-05-20 21:47   ` [PATCH v3 10/10] diff-merges: let "-m" imply "-p" Sergey Organov
2021-08-05  3:16     ` Jonathan Nieder
2021-08-06  1:45       ` [PATCH] Revert 'diff-merges: let "-m" imply "-p"' Jonathan Nieder
2021-08-06 17:21         ` Junio C Hamano
2021-08-06 17:55           ` Junio C Hamano
2021-08-06 19:57             ` Jonathan Nieder
2021-08-08 17:55               ` Junio C Hamano
2021-08-17  9:13                 ` Sergey Organov
2021-08-17 22:10                   ` Junio C Hamano
2021-08-18  8:56                     ` Sergey Organov
2021-08-19 18:50                       ` Junio C Hamano
2021-08-19 18:51                         ` Junio C Hamano
2021-08-20 10:24                         ` Sergey Organov
2021-08-07  1:55           ` Jonathan Nieder
2021-08-07  6:49             ` Johannes Sixt
2021-08-07 13:51               ` Jonathan Nieder
2021-08-07 17:00                 ` Junio C Hamano
2021-08-07 18:08                   ` Jonathan Nieder
2021-08-08  0:42                     ` Junio C Hamano
2021-08-17  9:17                       ` Sergey Organov
2021-08-16  9:09       ` [PATCH v3 10/10] diff-merges: let "-m" imply "-p" Sergey Organov

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