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 05:34:24 -0800 [thread overview]
Message-ID: <xmqqblekabof.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: 20201223045358.100754-2-felipe.contreras@gmail.com
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 "$DIFF3"
then
...
to catch a merge-file that writes halfway and then crashes (doing
the same check in different ways are probably possible, of course)
> + sed -e '/^<<<<<<< /,/^||||||| /d' -e '/^=======\r\?$/,/^>>>>>>> /d' "$DIFF3" >"$BASE"
Does everybody's sed take "\?" and interprets it as zero-or-one?
POSIX uses BRE and it doesn't like \? as far as I recall, and "-E"
to force ERE is a GNUism.
> + sed -e '/^||||||| /,/^>>>>>>> /d' -e '/^<<<<<<< /d' "$DIFF3" >"$LOCAL"
> + sed -e '/^<<<<<<< /,/^=======\r\?$/d' -e '/^>>>>>>> /d' "$DIFF3" >"$REMOTE"
I'd feel safer if these resulting $BASE, $LOCAL and $REMOTE are
validated to be conflict-marker free (i.e. '^\([<|=>]\)\1\1\1\1\1\1'
does not appear) to make sure there was no funny virtual ancestor
that records a conflicted recursive merge result confused our logic.
When we see an unfortunate sign that it happened, we can revert the
automerge and let the tool handle the original input.
> + fi
> + rm -- "$DIFF3"
> +}
> +
"$DIFF3" is always created (unless shell redirection into it fails),
so "rm --" would be fine in practice, I guess, but "rm -f --" would
not hurt.
> + DIFF3="$MERGETOOL_TMPDIR/${BASE}_DIFF3_$$$ext"
$MERGETOOL_TMPDIR is either "mktemp -d -t "git-mergetool-XXXXXX" or
".". Also, we liberally pass "$DIFF3" to "sed" as an argument and
assume that the command would take it as a filename and not an
option.
For the above reason, "rm --", while it is not wrong per-se, can be
just a simple "rm", as there is no funny leading letters in "$DIFF3"
that requires disambiguation.
next prev parent reply other threads:[~2020-12-23 13:35 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 [this message]
2020-12-23 14:23 ` Felipe Contreras
2020-12-23 20:21 ` Junio C Hamano
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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