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From: Leif Middelschulte <leif.middelschulte@gmail.com>
To: sbeller@google.com
Cc: git@vger.kernel.org, gitster@pobox.com,
	leif.middelschulte@gmail.com,
	Leif Middelschulte <Leif.Middelschulte@gmail.com>
Subject: [PATCH 1/1] Inform about fast-forwarding of submodules during merge
Date: Fri, 18 May 2018 21:48:02 +0200	[thread overview]
Message-ID: <20180518194802.28355-2-leif.middelschulte@gmail.com> (raw)
In-Reply-To: <20180518194802.28355-1-leif.middelschulte@gmail.com>

From: Leif Middelschulte <Leif.Middelschulte@gmail.com>

Silent fast-forwarding might lead to inconveniences in cases where
submodules are expected to have a certain revision, because 'more recent'
(therefore fast-forwardable) versions might break behavior/contain regressions.

A use-case is the integration (merge) phase as part of the feature-centric
'git-flow' workflow [0]. I.e. a feature might be well-tested with a certain
submodule revision, but break because of regressions (or changes in general)
within an updated version of the sourced submodule.

This change tries to support the integrator by telling her about another possible
source of unexpected behavior (differing submodule versions) she might see
during integration tests.

[0] http://nvie.com/posts/a-successful-git-branching-model/

Signed-off-by: Leif Middelschulte <Leif.Middelschulte@gmail.com>
---
 merge-recursive.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/merge-recursive.c b/merge-recursive.c
index a4b91d17f..e2c99924d 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1093,10 +1093,26 @@ static int merge_submodule(struct merge_options *o,
 	/* Case #1: a is contained in b or vice versa */
 	if (in_merge_bases(commit_a, commit_b)) {
 		oidcpy(result, b);
+		if (show(o, 3)) {
+			output(o, 3, _("Fast-forwarding submodule %s to the following commit:"), path);
+			output_commit_title(o, commit_b);
+		} else if (show(o, 2))
+			output(o, 2, _("Fast-forwarding submodule %s to %s"), path, oid_to_hex(b));
+		else
+			; /* no output */
+
 		return 1;
 	}
 	if (in_merge_bases(commit_b, commit_a)) {
 		oidcpy(result, a);
+		if (show(o, 3)) {
+			output(o, 3, _("Fast-forwarding submodule %s to the following commit:"), path);
+			output_commit_title(o, commit_a);
+		} else if (show(o, 2))
+			output(o, 2, _("Fast-forwarding submodule %s to %s"), path, oid_to_hex(a));
+		else
+			; /* no output */
+
 		return 1;
 	}
 
-- 
2.15.1 (Apple Git-101)


  reply	other threads:[~2018-05-18 19:48 UTC|newest]

Thread overview: 99+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-17  6:01 What's cooking in git.git (May 2018, #02; Thu, 17) Junio C Hamano
2018-05-17  6:39 ` jk/branch-l-0-deprecation (was Re: What's cooking in git.git (May 2018, #02; Thu, 17)) Kaartic Sivaraam
2018-05-17  9:48   ` Ævar Arnfjörð Bjarmason
2018-05-17 11:00     ` Kaartic Sivaraam
2018-05-17 12:02       ` Ævar Arnfjörð Bjarmason
2018-05-17 13:36     ` Jeff King
2018-05-24 15:10       ` Kaartic Sivaraam
2018-05-24 19:22         ` Jeff King
2018-05-24 19:31           ` [PATCH] branch: issue "-l" deprecation warning after pager starts Jeff King
2018-05-25  1:55             ` Junio C Hamano
2018-05-25  2:40               ` Jeff King
2018-05-25  8:56                 ` Junio C Hamano
2018-05-25  9:14                   ` Junio C Hamano
2018-05-25 17:10                     ` Jeff King
2018-05-26  2:37                       ` Junio C Hamano
2018-05-25 21:00                     ` [RFC PATCH 0/3] usage: prefix all lines in `vreportf()`, not just the first Martin Ågren
2018-05-25 21:00                       ` [RFC PATCH 1/3] usage: extract `prefix_suffix_lines()` from `advise()` Martin Ågren
2018-05-28  8:27                         ` Junio C Hamano
2018-05-28 18:40                         ` Duy Nguyen
2018-05-29 21:33                           ` Jeff King
2018-05-29 21:39                         ` Jeff King
2018-05-30  1:42                           ` Junio C Hamano
2018-05-30  6:00                             ` Junio C Hamano
2018-05-30 10:26                               ` Martin Ågren
2018-05-31  6:07                                 ` Jeff King
2018-05-25 21:00                       ` [RFC PATCH 2/3] usage: prefix all lines in `vreportf()`, not just the first Martin Ågren
2018-05-28  9:25                         ` Junio C Hamano
2018-05-28 18:45                           ` Duy Nguyen
2018-05-28 21:45                             ` Junio C Hamano
2018-05-29  4:49                               ` Martin Ågren
2018-05-29  5:50                                 ` Junio C Hamano
2018-05-29 10:30                                   ` Martin Ågren
2018-05-29 12:08                                     ` Junio C Hamano
2018-05-29 15:50                                 ` Duy Nguyen
2018-05-30 10:19                                   ` Martin Ågren
2018-05-29 21:32                           ` Jeff King
2018-05-30 10:20                             ` Martin Ågren
2018-05-25 21:00                       ` [RFC PATCH 3/3] usage: translate the "error: "-prefix and others Martin Ågren
2018-05-26  2:32                   ` [PATCH] branch: issue "-l" deprecation warning after pager starts Junio C Hamano
2018-05-26  2:33                     ` Junio C Hamano
2018-05-29 21:20                     ` Jeff King
2018-05-29 21:21                       ` Jeff King
2018-05-30  2:48                         ` Junio C Hamano
2018-05-31  5:44                           ` Jeff King
2018-05-26 19:39                 ` Kaartic Sivaraam
2018-06-02  4:46                 ` Duy Nguyen
2018-06-02  8:10                   ` Jeff King
2018-05-26 18:45             ` Kaartic Sivaraam
2018-05-29 21:15               ` Jeff King
2018-05-30  2:52                 ` Junio C Hamano
2018-05-31  5:51                   ` Jeff King
2018-06-01  1:35                     ` Junio C Hamano
2018-05-31  5:52                   ` Kaartic.Sivaraam
2018-05-17 13:22 ` What's cooking in git.git (May 2018, #02; Thu, 17) Derrick Stolee
2018-05-17 18:20 ` Stefan Beller
2018-05-17 18:29   ` [PATCH 0/2] Reroll 2 last commits of sb/object-store-replace Stefan Beller
2018-05-17 18:29     ` [PATCH 1/2] object.c: free replace map in raw_object_store_clear Stefan Beller
2018-05-17 18:29     ` [PATCH 2/2] replace-object.c: remove the_repository from prepare_replace_object Stefan Beller
2018-05-17 18:40   ` [PATCH] merge-recursive: give notice when submodule commit gets fast-forwarded Stefan Beller
2018-05-18 19:43     ` [PATCH v2 0/1] rebased: inform about auto submodule ff Leif Middelschulte
2018-05-18 19:48     ` [PATCH v3 " Leif Middelschulte
2018-05-18 19:48       ` Leif Middelschulte [this message]
2018-05-18 21:25         ` [PATCH 1/1] Inform about fast-forwarding of submodules during merge Elijah Newren
2018-05-21  4:12           ` Junio C Hamano
2018-05-17 19:46   ` [PATCH 0/8] Reroll of sb/diff-color-move-more Stefan Beller
2018-05-17 19:46     ` [PATCH 1/8] xdiff/xdiff.h: remove unused flags Stefan Beller
2018-05-17 19:46     ` [PATCH 2/8] xdiff/xdiffi.c: remove unneeded function declarations Stefan Beller
2018-05-17 19:46     ` [PATCH 3/8] diff.c: do not pass diff options as keydata to hashmap Stefan Beller
2018-05-17 19:46     ` [PATCH 4/8] diff.c: adjust hash function signature to match hashmap expectation Stefan Beller
2018-05-17 19:46     ` [PATCH 5/8] diff.c: add a blocks mode for moved code detection Stefan Beller
2018-05-17 19:46     ` [PATCH 6/8] diff.c: decouple white space treatment from move detection algorithm Stefan Beller
2018-05-18  4:00       ` Simon Ruderich
2018-05-18 19:25         ` Stefan Beller
2018-05-17 19:46     ` [PATCH 7/8] diff.c: add --color-moved-ignore-space-delta option Stefan Beller
2018-05-17 19:46     ` [PATCH 8/8] diff: color-moved white space handling options imply color-moved Stefan Beller
2018-05-17 22:53     ` [PATCH 0/8] Reroll of sb/diff-color-move-more Jonathan Tan
2018-06-07 23:54     ` Jacob Keller
2018-05-17 22:36   ` What's cooking in git.git (May 2018, #02; Thu, 17) Junio C Hamano
2018-05-17 22:39     ` Stefan Beller
2018-05-17 22:56     ` Junio C Hamano
2018-05-17 22:58       ` Stefan Beller
2018-05-21  1:57 ` brian m. carlson
2018-05-21 17:36   ` Stefan Beller
2018-05-25 12:28 ` sb/submodule-move-nested breaks t7411 under GIT_FSMONITOR_TEST Ævar Arnfjörð Bjarmason
2018-05-25 17:27   ` Stefan Beller
2018-05-25 19:49   ` Stefan Beller
2018-09-06 12:31     ` Ævar Arnfjörð Bjarmason
2018-09-06 16:57       ` Stefan Beller
2018-09-06 19:03         ` Ben Peart
2018-09-06 20:14           ` Stefan Beller
2018-09-06 20:34             ` [PATCH] git-mv: allow submodules and fsmonitor to work together Stefan Beller
2018-09-10 15:58               ` Ben Peart
2018-09-10 16:29                 ` [PATCH v1] " Ben Peart
2018-09-10 17:07                   ` Stefan Beller
2018-09-10 19:38                     ` Ben Peart
  -- strict thread matches above, loose matches on Subject: below --
2018-05-11  1:00 [PATCH 0/2] Submodule merging: i18n, verbosity Stefan Beller
2018-05-14 20:57 ` [PATCH 0/1] rebased: inform about auto submodule ff during merge Leif Middelschulte
2018-05-14 20:57   ` [PATCH 1/1] Inform about fast-forwarding of submodules " Leif Middelschulte
2018-05-15  0:41     ` Stefan Beller
2018-05-15  1:17     ` Elijah Newren
2018-05-15  7:34       ` Junio C Hamano

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