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From: Junio C Hamano <>
To: Elijah Newren <>
Cc: Johannes Schindelin <>,
	Ævar Arnfjörð  <>,, Git Mailing List <>,
	Stefan Beller <>
Subject: Re: A rebase regression in Git 2.18.0
Date: Tue, 28 Aug 2018 09:58:02 -0700
Message-ID: <> (raw)
In-Reply-To: <>

Elijah Newren <> 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".

  reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-28 12:27 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 [this message]
2018-08-29  7:06         ` [PATCH 0/3] Turn off directory rename detection in am -3 Elijah Newren
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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