2005-08-23 08:49:47 +00:00
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git-patch-id(1)
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===============
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NAME
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----
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2007-01-18 23:53:37 +00:00
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git-patch-id - Compute unique ID for a patch
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2005-08-23 08:49:47 +00:00
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SYNOPSIS
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--------
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2011-07-02 02:38:26 +00:00
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[verse]
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2008-06-30 06:09:04 +00:00
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'git patch-id' < <patch>
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2005-08-23 08:49:47 +00:00
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DESCRIPTION
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-----------
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2005-08-27 01:18:48 +00:00
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A "patch ID" is nothing but a SHA1 of the diff associated with a patch, with
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whitespace and line numbers ignored. As such, it's "reasonably stable", but at
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2006-06-03 20:27:26 +00:00
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the same time also reasonably unique, i.e., two patches that have the same "patch
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2005-08-27 01:18:48 +00:00
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ID" are almost guaranteed to be the same thing.
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2005-08-23 08:49:47 +00:00
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2005-08-27 01:18:48 +00:00
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IOW, you can use this thing to look for likely duplicate commits.
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2005-08-23 08:49:47 +00:00
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2010-01-09 23:33:00 +00:00
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When dealing with 'git diff-tree' output, it takes advantage of
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2005-10-28 09:39:56 +00:00
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the fact that the patch is prefixed with the object name of the
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2009-03-25 18:23:42 +00:00
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commit, and outputs two 40-byte hexadecimal strings. The first
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2005-10-28 09:39:56 +00:00
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string is the patch ID, and the second string is the commit ID.
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This can be used to make a mapping from patch ID to commit ID.
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2005-08-23 08:49:47 +00:00
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OPTIONS
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-------
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2005-08-27 01:18:48 +00:00
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<patch>::
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The diff to create the ID of.
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2005-08-23 08:49:47 +00:00
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GIT
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---
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2008-06-06 07:07:32 +00:00
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Part of the linkgit:git[1] suite
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