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From: Sergey Organov <sorganov@gmail.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: Jeff King <peff@peff.net>,
	git@vger.kernel.org, Chris Torek <chris.torek@gmail.com>
Subject: Re: [PATCH v2 0/7] making log --first-parent imply -m
Date: Fri, 07 Aug 2020 22:12:29 +0300	[thread overview]
Message-ID: <87tuxel17m.fsf@osv.gnss.ru> (raw)
In-Reply-To: <xmqqh7tegu0m.fsf@gitster.c.googlers.com> (Junio C. Hamano's message of "Fri, 07 Aug 2020 12:01:29 -0700")

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

> Sergey Organov <sorganov@gmail.com> writes:
>
>>> I agree in principle that the above is a good framework to think
>>> about the issue around "what to do with diff when showing a merge
>>> commit", but I suspect that overly spending our effort to cover the
>>> possibilities become mostly useless mental exercise, mostly because
>>> (1) comparing with second parent is mostly useful only when the
>>> merge was done in the wrong direction (i.e. an attempt by a leaf
>>> contributor to "catch up to the trunc"), (2) octopus merges are rare
>>> curiosity and discouraged due to bisect efficiency anyway, and (3)
>>> even when looking at an octopus merge, omitting some and using only
>>> a few selected parents to view with --cc/-c has dubious usefulness,
>>> as the postimage has to show contributions from all the parents
>>> plus "evil" adjustment anyway (iow, the primary effect of omitting
>>> parents while viewing --cc/-c is to make it fuzzy which part of
>>> apparently "evil" adjustment is what the merge did vs what the
>>> hidden parents did).  These are all examples that show not all the
>>> combinations are useful.
>>>
>>> So...
>>
>> So, does
>>
>> --diff-merges=(off,none|comb|dense,dense-comb,comb-dense|sep,split)
>>
>> make sense as covering all the current features?
>
> If we are primarily interested in theoretical completeness, it may.
> If we are interested more in practical usefulness, I am not sure if
> such a "full flexibility" matrix is a good way to present the
> feature to the end-users.

I thought it's just a -c, -cc, and -m in better wording. No any
matrix:

-c  = --diff-merges=combined
-cc = --diff-merges=dense
-m  = --diff-merges=split

Just separate mutually exclusive options assembled into one multi-value
option, so it's explicit they are mutually exclusive. I don't see any
matrix here.

Thanks,
-- Sergey

  reply	other threads:[~2020-08-07 19:12 UTC|newest]

Thread overview: 86+ 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
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 [this message]
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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