git-patch-id.html

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 306 </style>
 307 <title>git-patch-id(1)</title>
 308 </head>
 309 <body>
 310 <div id="header">
 311 <h1>
 312 git-patch-id(1) Manual Page
 313 </h1>
 314 <h2>NAME</h2>
 315 <div class="sectionbody">
 316 <p>git-patch-id -
 317    Compute unique ID for a patch
 318 </p>
 319 </div>
 320 </div>
 321 <h2>SYNOPSIS</h2>
 322 <div class="sectionbody">
 323 <div class="para"><p><em>git patch-id</em> &lt; &lt;patch&gt;</p></div>
 324 </div>
 325 <h2 id="_description">DESCRIPTION</h2>
 326 <div class="sectionbody">
 327 <div class="para"><p>A "patch ID" is nothing but a SHA1 of the diff associated with a patch, with
 328 whitespace and line numbers ignored.  As such, it's "reasonably stable", but at
 329 the same time also reasonably unique, i.e., two patches that have the same "patch
 330 ID" are almost guaranteed to be the same thing.</p></div>
 331 <div class="para"><p>IOW, you can use this thing to look for likely duplicate commits.</p></div>
 332 <div class="para"><p>When dealing with <em>git-diff-tree</em> output, it takes advantage of
 333 the fact that the patch is prefixed with the object name of the
 334 commit, and outputs two 40-byte hexadecimal strings.  The first
 335 string is the patch ID, and the second string is the commit ID.
 336 This can be used to make a mapping from patch ID to commit ID.</p></div>
 337 </div>
 338 <h2 id="_options">OPTIONS</h2>
 339 <div class="sectionbody">
 340 <div class="vlist"><dl>
 341 <dt>
 342 &lt;patch&gt;
 343 </dt>
 344 <dd>
 345 <p>
 346         The diff to create the ID of.
 347 </p>
 348 </dd>
 349 </dl></div>
 350 </div>
 351 <h2 id="_author">Author</h2>
 352 <div class="sectionbody">
 353 <div class="para"><p>Written by Linus Torvalds &lt;torvalds@osdl.org&gt;</p></div>
 354 </div>
 355 <h2 id="_documentation">Documentation</h2>
 356 <div class="sectionbody">
 357 <div class="para"><p>Documentation by Junio C Hamano and the git-list &lt;git@vger.kernel.org&gt;.</p></div>
 358 </div>
 359 <h2 id="_git">GIT</h2>
 360 <div class="sectionbody">
 361 <div class="para"><p>Part of the <a href="git.html">git(1)</a> suite</p></div>
 362 </div>
 363 <div id="footer">
 364 <div id="footer-text">
 365 Last updated 2009-04-02 06:49:59 UTC
 366 </div>
 367 </div>
 368 </body>
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