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authorLibravatar Jeff King <peff@peff.net>2016-09-09 16:34:34 -0400
committerLibravatar Junio C Hamano <gitster@pobox.com>2016-09-09 14:13:53 -0700
commit5a29cbc6e9c5f7d28228f4f389a122ca074a9c08 (patch)
treed49573deea0f9582988d049f30de875b43ce619a /t/t4034/tex
parentGit 2.10 (diff)
downloadtgif-5a29cbc6e9c5f7d28228f4f389a122ca074a9c08.tar.xz
patch-ids: turn off rename detection
The patch-id code may be running inside another porcelain like "git log" or "git format-patch", and therefore may have set diff_detect_rename_default, either via the diff-ui config, or by default since 5404c11 (diff: activate diff.renames by default, 2016-02-25). This is the case even if a command is run with `--no-renames`, as that is applied only to the diff-options used by the command itself. Rename detection doesn't help the patch-id results. It _may_ actually hurt, as minor differences in the files that would be overlooked by patch-id's canonicalization might result in different renames (though I'd doubt that it ever comes up in practice). But mostly it is just a waste of CPU to compute these renames. Note that this does have one user-visible impact: the prerequisite patches listed by "format-patch --base". There may be some confusion between different versions of git as older ones will enable renames, but newer ones will not. However, this was already a problem, as people with different settings for the "diff.renames" config would get different results. After this patch, everyone should get the same results, regardless of their config. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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