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<title>git-patch-id(1)</title>
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<h1>
git-patch-id(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>git-patch-id -
Compute unique ID for a patch
</p>
</div>
</div>
<h2>SYNOPSIS</h2>
<div class="sectionbody">
<p><em>git-patch-id</em> &lt; &lt;patch&gt;</p>
</div>
<h2>DESCRIPTION</h2>
<div class="sectionbody">
<p>A "patch ID" is nothing but a SHA1 of the diff associated with a patch, with
whitespace and line numbers ignored. As such, it's "reasonably stable", but at
the same time also reasonably unique, i.e., two patches that have the same "patch
ID" are almost guaranteed to be the same thing.</p>
<p>IOW, you can use this thing to look for likely duplicate commits.</p>
<p>When dealing with git-diff-tree output, it takes advantage of
the fact that the patch is prefixed with the object name of the
commit, and outputs two 40-byte hexadecimal string. The first
string is the patch ID, and the second string is the commit ID.
This can be used to make a mapping from patch ID to commit ID.</p>
</div>
<h2>OPTIONS</h2>
<div class="sectionbody">
<dl>
<dt>
&lt;patch&gt;
</dt>
<dd>
<p>
The diff to create the ID of.
</p>
</dd>
</dl>
</div>
<h2>Author</h2>
<div class="sectionbody">
<p>Written by Linus Torvalds &lt;torvalds@osdl.org&gt;</p>
</div>
<h2>Documentation</h2>
<div class="sectionbody">
<p>Documentation by Junio C Hamano and the git-list &lt;git@vger.kernel.org&gt;.</p>
</div>
<h2>GIT</h2>
<div class="sectionbody">
<p>Part of the <a href="git.html">git(7)</a> suite</p>
</div>
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Last updated 07-Jan-2008 07:50:36 UTC
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