From: Elijah Newren <newren@gmail.com>
To: git@vger.kernel.org
Cc: gitster@pobox.com, corrmage@gmail.com, avarab@gmail.com,
Johannes.Schindelin@gmx.de, sbeller@google.com,
Elijah Newren <newren@gmail.com>
Subject: [PATCH 0/3] Turn off directory rename detection in am -3
Date: Wed, 29 Aug 2018 00:06:10 -0700 [thread overview]
Message-ID: <20180829070613.11793-1-newren@gmail.com> (raw)
In-Reply-To: <xmqqh8jeh1id.fsf@gitster-ct.c.googlers.com>
On Tue, Aug 28, 2018 at 9:58 AM Junio C Hamano <gitster@pobox.com> wrote:
> Elijah Newren <newren@gmail.com> writes:
>
> > - Add a flag to turn off directory rename detection, and set the
> > flag for every call from am.c in order to avoid problems like this.
>
> I'd say this is the only practical solution, before you deprecate
> the "pipe format-patch output to am -3" style of "git rebase" (and
> optionally replace with something else).
>
> The whole point of "am -3" is to do _better_ than just "patch" with
> minimum amount of information available on the pre- and post- image
> blobs, without knowing the remainder of the tree that the patch did
> not touch. It is not surprising that the heuristics that look at
> the unchanging part of the tree to infer renames that may or may not
> exist guesses incorrectly, either with false positive or negative.
> In the context of "rebase", we always have all the trees that are
> involved. We should be able to do better than "am -3".
Here are patches to do so; they are built on the top of
en/rebase-consistency, since I wanted to re-use some test code and the
testfile introduced in that series, and to keep similar tests
together.
Elijah Newren (3):
t3401: add another directory rename testcase for rebase and am
merge-recursive: add ability to turn off directory rename detection
am: avoid directory rename detection when calling recursive merge
machinery
builtin/am.c | 1 +
merge-recursive.c | 18 ++++--
merge-recursive.h | 1 +
t/t3401-rebase-and-am-rename.sh | 110 +++++++++++++++++++++++++++++++-
4 files changed, 124 insertions(+), 6 deletions(-)
--
2.18.0.12.g97a29da30a
next prev parent reply other threads:[~2018-08-29 7:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-28 12:27 A rebase regression in Git 2.18.0 Nikolay Kasyanov
2018-08-28 13:17 ` Ævar Arnfjörð Bjarmason
2018-08-28 13:33 ` Johannes Schindelin
2018-08-28 13:46 ` Nikolay Kasyanov
2018-08-28 15:35 ` Elijah Newren
2018-08-28 16:58 ` Junio C Hamano
2018-08-29 7:06 ` Elijah Newren [this message]
2018-08-29 7:06 ` [PATCH 1/3] t3401: add another directory rename testcase for rebase and am Elijah Newren
2018-08-29 22:12 ` Junio C Hamano
2018-08-29 23:47 ` Elijah Newren
2018-08-30 16:01 ` Junio C Hamano
2018-08-30 16:26 ` Elijah Newren
2018-08-29 7:06 ` [PATCH 2/3] merge-recursive: add ability to turn off directory rename detection Elijah Newren
2018-08-29 12:54 ` Johannes Schindelin
2018-08-29 23:00 ` Elijah Newren
2018-08-29 7:06 ` [PATCH 3/3] am: avoid directory rename detection when calling recursive merge machinery Elijah Newren
2018-08-29 12:51 ` Johannes Schindelin
2018-08-30 16:41 ` A rebase regression in Git 2.18.0 Elijah Newren
2018-08-31 10:11 ` Johannes Schindelin
2018-08-31 19:37 ` Elijah Newren
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