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From: Junio C Hamano <gitster@pobox.com>
To: "brian m. carlson" <sandals@crustytoothpaste.net>
Cc: git@vger.kernel.org, "SZEDER Gábor" <szeder.dev@gmail.com>,
	"Taylor Blau" <me@ttaylorr.com>, "Jeff King" <peff@peff.net>
Subject: Re: [PATCH v3 2/2] apply: reload .gitattributes after patching it
Date: Tue, 13 Aug 2019 11:08:46 -0700
Message-ID: <xmqq7e7h7xap.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <20190813024307.705016-3-sandals@crustytoothpaste.net> (brian m. carlson's message of "Tue, 13 Aug 2019 02:43:07 +0000")

"brian m. carlson" <sandals@crustytoothpaste.net> writes:

> When applying multiple patches with git am, or when rebasing using the
> am backend, it's possible that one of our patches has updated a
> gitattributes file. Currently, we cache this information, so if a
> file in a subsequent patch has attributes applied, the file will be
> written out with the attributes in place as of the time we started the
> rebase or am operation, not with the attributes applied by the previous
> patch. This problem does not occur when using the -m or -i flags to
> rebase.

Back when "am" was a script that repeatedly calls "apply --index &&
commit-tree", caching the original contents of the attributes file
and using it throughout the series would have been impossible to
begin with, so this must be a regression when we rewrote it in C and
moved to do everything in a single process without clearly the state
between the steps, I guess.

"rebase -m" and "rebase -i" are not repeated run_command() calls
that invoke "git cherry-pick" or "git merge" these days, either, so
I am somewhat curious how they avoid fallilng into the same trap.

Thanks for the fix.  Will queue.

  reply index

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-09 10:02 [PATCH] " brian m. carlson
2019-08-09 11:14 ` Taylor Blau
2019-08-09 11:25   ` brian m. carlson
2019-08-09 11:36     ` Jeff King
2019-08-09 11:47       ` brian m. carlson
2019-08-09 12:43       ` SZEDER Gábor
2019-08-09 13:51         ` Jeff King
2019-08-09 22:08           ` brian m. carlson
2019-08-11 17:47 ` [PATCH v2 0/2] Honor .gitattributes with rebase --am brian m. carlson
2019-08-11 17:47   ` [PATCH v2 1/2] path: add a function to check for path suffix brian m. carlson
2019-08-12  0:32     ` Junio C Hamano
2019-08-12  1:10       ` brian m. carlson
2019-08-12  4:36         ` SZEDER Gábor
2019-08-12 16:49         ` Junio C Hamano
2019-08-12 22:40           ` brian m. carlson
2019-08-13  1:13             ` Jeff King
2019-08-13 16:40             ` Junio C Hamano
2019-08-13  6:36           ` SZEDER Gábor
2019-08-13 16:42             ` Junio C Hamano
2019-08-11 17:47   ` [PATCH v2 2/2] apply: reload .gitattributes after patching it brian m. carlson
2019-08-13  2:43 ` [PATCH v3 0/2] Honor .gitattributes with rebase --am brian m. carlson
2019-08-13  2:43   ` [PATCH v3 1/2] path: add a function to check for path suffix brian m. carlson
2019-08-13  2:43   ` [PATCH v3 2/2] apply: reload .gitattributes after patching it brian m. carlson
2019-08-13 18:08     ` Junio C Hamano [this message]
2019-08-15 22:10       ` Junio C Hamano
2019-08-16  0:22         ` brian m. carlson
2019-08-13 22:37     ` Junio C Hamano
2019-08-13 22:48       ` brian m. carlson
2019-08-18 18:44 ` [PATCH v4 0/2] Honor .gitattributes with rebase --am brian m. carlson
2019-08-18 18:44   ` [PATCH v4 1/2] path: add a function to check for path suffix brian m. carlson
2019-08-18 18:44   ` [PATCH v4 2/2] apply: reload .gitattributes after patching it brian m. carlson
2019-08-19  9:41     ` Phillip Wood
2019-08-19  9:55       ` Phillip Wood
2019-08-20  3:05         ` brian m. carlson
2019-08-20  8:56           ` Phillip Wood
2019-08-20  2:45       ` brian m. carlson
2019-08-20  8:52         ` Phillip Wood
2019-08-20 18:24           ` Junio C Hamano
2019-08-20 18:32             ` Phillip Wood
2019-08-26 15:09               ` Phillip Wood
2019-08-26 16:41                 ` Junio C Hamano

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