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From: Junio C Hamano <gitster@pobox.com>
To: Felipe Contreras <felipe.contreras@gmail.com>
Cc: git@vger.kernel.org, David Aguilar <davvid@gmail.com>,
	Johannes Sixt <j6t@kdbg.org>, Seth House <seth@eseth.com>
Subject: Re: [PATCH v5 1/1] mergetool: add automerge configuration
Date: Wed, 23 Dec 2020 12:21:43 -0800	[thread overview]
Message-ID: <xmqqblek8e94.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <5fe352e3968f6_198be2083@natae.notmuch> (Felipe Contreras's message of "Wed, 23 Dec 2020 08:23:31 -0600")

Felipe Contreras <felipe.contreras@gmail.com> writes:

> Junio C Hamano wrote:
>> Felipe Contreras <felipe.contreras@gmail.com> writes:
>> 
>> > +auto_merge () {
>> > +	git merge-file --diff3 --marker-size=7 -q -p "$LOCAL" "$BASE" "$REMOTE" >"$DIFF3"
>> > +	if test -s "$DIFF3"
>> > +	then
>> 
>> We do not want to ignore the exit status from the command.  IOW, I
>> think the above wants to be rather
>> 
>> 	if git merge-file ... >"$DIFF3" &&
>> 	   test -s "$DIFF3"
>> 	then
>> 		...
>
> That doesn't work.
>
> "git merge-file" always returns non-zero status when it succeeds (it's
> the number of conflicts generated).

Ah, I forgot about that one.  I think "the number of conflicts" was
a UI mistake (the original that it mimics is "merge" from RCS suite,
which uses 1 and 2 for "conflicts" and "trouble") but we know we
will get conflicts, so it is wrong to expect success from the
command.  Deliberately ignoring the return status is the right thing
to do.

> What if the original file does have these markers?
>
> Which is probably something we should be checking beforehand and not
> attempt an automerge in those cases.

Yes, that is a much better approach to avoid unnecessary work.

When we made the conflict marker length configurable, we were hoping
that we no longer have to worry about the cases where payload files
(original or ours or theirs) have lines that are confusingly similar
to the conflict markers, but because we are interfacing external tools
that are unaware of the facility, it probably would not help us in
this case all that much.

FWIW, we use a fiarly large size for our own files in t/ and
Documentation/ directories ourselves, and it does help topic branch
merges somewhat frequently.

  reply	other threads:[~2020-12-23 20:22 UTC|newest]

Thread overview: 80+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-23  4:53 [PATCH v5 0/1] mergetool: remove unconflicted lines Felipe Contreras
2020-12-23  4:53 ` [PATCH v5 1/1] mergetool: add automerge configuration Felipe Contreras
2020-12-23 13:34   ` Junio C Hamano
2020-12-23 14:23     ` Felipe Contreras
2020-12-23 20:21       ` Junio C Hamano [this message]
2020-12-24  0:14         ` Felipe Contreras
2020-12-24  0:32           ` Junio C Hamano
2020-12-24  1:36             ` Felipe Contreras
2020-12-24  6:17               ` Junio C Hamano
2020-12-24 15:59                 ` Felipe Contreras
2020-12-24 22:32                   ` Junio C Hamano
2020-12-27 18:01                     ` Felipe Contreras
2020-12-24  9:24 ` [PATCH v5 0/1] mergetool: remove unconflicted lines Junio C Hamano
2020-12-24 16:16   ` Felipe Contreras
2020-12-30  5:47   ` Johannes Schindelin
2020-12-30 22:33     ` Felipe Contreras
2020-12-27 20:58 ` [PATCH v6 0/1] mergetool: add automerge configuration Seth House
2020-12-27 20:58   ` [PATCH v6 1/2] " Seth House
2020-12-27 22:06     ` Junio C Hamano
2020-12-27 22:29       ` Seth House
2020-12-27 22:59         ` Junio C Hamano
2020-12-27 20:58   ` [PATCH v6 2/2] mergetool: Add per-tool support for the autoMerge flag Seth House
2020-12-27 22:31     ` Junio C Hamano
2020-12-28  0:41   ` [PATCH v7 0/2] mergetool: add automerge configuration Seth House
2020-12-28  0:41     ` [PATCH v7 1/2] " Seth House
2020-12-28  0:41     ` [PATCH v7 2/2] mergetool: Add per-tool support for the autoMerge flag Seth House
2020-12-28  1:18       ` Felipe Contreras
2020-12-28  4:54     ` [PATCH v8 0/4] mergetool: add automerge configuration Seth House
2020-12-28  4:54       ` [PATCH v8 1/4] " Seth House
2020-12-28 11:30         ` Johannes Sixt
2020-12-28  4:54       ` [PATCH v8 2/4] mergetool: Add per-tool support for the autoMerge flag Seth House
2020-12-28 13:09         ` Junio C Hamano
2020-12-28  4:54       ` [PATCH v8 3/4] mergetool: Break setup_tool out into separate initialization function Seth House
2020-12-28 11:48         ` Johannes Sixt
2020-12-28  4:54       ` [PATCH v8 4/4] mergetool: Add automerge_enabled tool-specific override function Seth House
2020-12-28 11:57         ` Johannes Sixt
2020-12-28 13:19         ` Junio C Hamano
2020-12-28 19:29       ` [PATCH v9 0/5] mergetool: add automerge configuration Seth House
2020-12-28 19:29         ` [PATCH v9 1/5] " Seth House
2020-12-28 19:29         ` [PATCH v9 2/5] mergetool: alphabetize the mergetool config docs Seth House
2020-12-28 19:29         ` [PATCH v9 3/5] mergetool: add per-tool support for the autoMerge flag Seth House
2020-12-28 19:29         ` [PATCH v9 4/5] mergetool: break setup_tool out into separate initialization function Seth House
2020-12-29  8:50           ` Johannes Sixt
2020-12-29 17:23             ` Seth House
2020-12-28 19:29         ` [PATCH v9 5/5] mergetool: add automerge_enabled tool-specific override function Seth House
2020-12-29  2:01           ` Felipe Contreras
2021-01-06  5:55           ` Junio C Hamano
2021-01-07  3:58             ` Seth House
2021-01-07  6:38               ` Junio C Hamano
2021-01-07  9:27                 ` Seth House
2021-01-07 21:26                   ` Junio C Hamano
2021-01-08 15:04                     ` Johannes Schindelin
2021-01-30  5:46         ` [PATCH v10 0/3] mergetool: add hideResolved configuration (was automerge) Seth House
2021-01-30  5:46           ` [PATCH v10 1/3] mergetool: add hideResolved configuration Seth House
2021-01-30  8:08             ` Junio C Hamano
2021-01-30  5:46           ` [PATCH v10 2/3] mergetool: break setup_tool out into separate initialization function Seth House
2021-01-30  5:46           ` [PATCH v10 3/3] mergetool: add per-tool support and overrides for the hideResolved flag Seth House
2021-01-30  8:08             ` Junio C Hamano
2021-02-09 20:07           ` [PATCH v11 0/3] mergetool: add hideResolved configuration (was automerge) Seth House
2021-02-09 20:07             ` [PATCH v11 1/3] mergetool: add hideResolved configuration Seth House
2021-03-09  2:29               ` [PATCH] mergetool: do not enable hideResolved by default Jonathan Nieder
2021-03-09  5:42                 ` Seth House
2021-03-10  1:23                   ` Jonathan Nieder
2021-03-10  8:06                 ` Junio C Hamano
2021-03-11  1:57                   ` Junio C Hamano
2021-03-12 23:12                     ` Junio C Hamano
2021-03-12 23:29                       ` Jonathan Nieder
2021-03-12 23:36                         ` Junio C Hamano
2021-03-13  8:36                           ` [PATCH v2 0/2] " Jonathan Nieder
2021-03-13  8:38                             ` [PATCH 1/2] " Jonathan Nieder
2021-03-13  8:41                             ` [PATCH 2/2] doc: describe mergetool configuration in git-mergetool(1) Jonathan Nieder
2021-03-13 23:34                               ` Junio C Hamano
2021-03-13 23:37                               ` Junio C Hamano
2021-02-09 20:07             ` [PATCH v11 2/3] mergetool: break setup_tool out into separate initialization function Seth House
2021-02-09 20:07             ` [PATCH v11 3/3] mergetool: add per-tool support and overrides for the hideResolved flag Seth House
2021-02-09 22:11             ` [PATCH v11 0/3] mergetool: add hideResolved configuration (was automerge) Junio C Hamano
2021-02-09 23:27               ` Seth House
2020-12-28 10:29     ` [PATCH v7 0/2] mergetool: add automerge configuration Junio C Hamano
2020-12-28 14:40       ` Felipe Contreras
2020-12-28  1:02   ` [PATCH v6 0/1] " Felipe Contreras

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