1GIT-PATCH-ID(1)                   Git Manual                   GIT-PATCH-ID(1)
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NAME

6       git-patch-id - Compute unique ID for a patch
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SYNOPSIS

9       git-patch-id < <patch>
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DESCRIPTION

12       A "patch ID" is nothing but a SHA1 of the diff associated with a patch,
13       with whitespace and line numbers ignored. As such, it´s "reasonably
14       stable", but at the same time also reasonably unique, i.e., two patches
15       that have the same "patch ID" are almost guaranteed to be the same
16       thing.
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18       IOW, you can use this thing to look for likely duplicate commits.
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20       When dealing with git-diff-tree output, it takes advantage of the fact
21       that the patch is prefixed with the object name of the commit, and
22       outputs two 40-byte hexadecimal string. The first string is the patch
23       ID, and the second string is the commit ID. This can be used to make a
24       mapping from patch ID to commit ID.
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OPTIONS

27       <patch>
28           The diff to create the ID of.
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AUTHOR

31       Written by Linus Torvalds <torvalds@osdl.org>
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DOCUMENTATION

34       Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
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GIT

37       Part of the git(7) suite
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42Git 1.5.3.3                       10/09/2007                   GIT-PATCH-ID(1)