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<body class="manpage">
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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>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><em>git patch-id</em> &lt; &lt;patch&gt;</pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>A "patch ID" is nothing but a SHA-1 of the diff associated with a patch, with
whitespace and line numbers ignored.  As such, it&#8217;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></div>
<div class="paragraph"><p>IOW, you can use this thing to look for likely duplicate commits.</p></div>
<div class="paragraph"><p>When dealing with <em>git diff-tree</em> 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 strings.  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>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
&lt;patch&gt;
</dt>
<dd>
<p>
        The diff to create the ID of.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_git">GIT</h2>
<div class="sectionbody">
<div class="paragraph"><p>Part of the <a href="git.html">git(1)</a> suite</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated 2013-06-10 20:01:55 UTC
</div>
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