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chromium / external / gitster / git-htmldocs / 83e0e0bed9a67680b1d8e76a8de9b2f643e14372 / . / technical / api-revision-walking.html
blob: e8b8a8dc1d17b57e1216edb69d67860da6299078 [file] [log] [blame]
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
2 "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]5<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
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Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]7<title>revision walking API</title>
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]8<style type="text/css">
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]9/* Shared CSS for AsciiDoc xhtml11 and html5 backends */
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]24}
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Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]30a {
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]37
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Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]89
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]98
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]175 border: 1px solid #dddddd;
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]187}
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]188
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]191 text-align: right;
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Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]193
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Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]203div.verseblock + div.attribution {
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Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]221 border-left: 3px solid #dddddd;
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]268
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]269tfoot {
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Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]272td > div.verse {
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]303
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]449
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]480table.tableblock.frame-topbot {
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]512
513/*
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Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]530
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]731</head>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]732<body class="article">
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]733<div id="header">
734<h1>revision walking API</h1>
735</div>
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]736<div id="content">
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]737<div id="preamble">
738<div class="sectionbody">
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]739<div class="paragraph"><p>The revision walking API offers functions to build a list of revisions
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]740and then iterate over that list.</p></div>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]741</div>
742</div>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]743<div class="sect1">
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]744<h2 id="_calling_sequence">Calling sequence</h2>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]745<div class="sectionbody">
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]746<div class="paragraph"><p>The walking API has a given calling sequence: first you need to
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]747initialize a rev_info structure, then add revisions to control what kind
748of revision list do you want to get, finally you can iterate over the
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]749revision list.</p></div>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]750</div>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]751</div>
752<div class="sect1">
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]753<h2 id="_functions">Functions</h2>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]754<div class="sectionbody">
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]755<div class="dlist"><dl>
756<dt class="hdlist1">
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]757<code>init_revisions</code>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]758</dt>
759<dd>
760<p>
761 Initialize a rev_info structure with default values. The second
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]762 parameter may be NULL or can be prefix path, and then the <code>.prefix</code>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]763 variable will be set to it. This is typically the first function you
764 want to call when you want to deal with a revision list. After calling
765 this function, you are free to customize options, like set
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]766 <code>.ignore_merges</code> to 0 if you don&#8217;t want to ignore merges, and so on. See
767 <code>revision.h</code> for a complete list of available options.
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]768</p>
769</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]770<dt class="hdlist1">
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]771<code>add_pending_object</code>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]772</dt>
773<dd>
774<p>
775 This function can be used if you want to add commit objects as revision
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]776 information. You can use the <code>UNINTERESTING</code> object flag to indicate if
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]777 you want to include or exclude the given commit (and commits reachable
778 from the given commit) from the revision list.
779</p>
780<div class="admonitionblock">
781<table><tr>
782<td class="icon">
783<div class="title">Note</div>
784</td>
785<td class="content">If you have the commits as a string list then you probably want to
786use setup_revisions(), instead of parsing each string and using this
787function.</td>
788</tr></table>
789</div>
790</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]791<dt class="hdlist1">
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]792<code>setup_revisions</code>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]793</dt>
794<dd>
795<p>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]796 Parse revision information, filling in the <code>rev_info</code> structure, and
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]797 removing the used arguments from the argument list. Returns the number
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]798 of arguments left that weren&#8217;t recognized, which are also moved to the
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]799 head of the argument list. The last parameter is used in case no
800 parameter given by the first two arguments.
801</p>
802</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]803<dt class="hdlist1">
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]804<code>prepare_revision_walk</code>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]805</dt>
806<dd>
807<p>
808 Prepares the rev_info structure for a walk. You should check if it
809 returns any error (non-zero return code) and if it does not, you can
810 start using get_revision() to do the iteration.
811</p>
812</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]813<dt class="hdlist1">
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]814<code>get_revision</code>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]815</dt>
816<dd>
817<p>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]818 Takes a pointer to a <code>rev_info</code> structure and iterates over it,
819 returning a <code>struct commit *</code> each time you call it. The end of the
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]820 revision list is indicated by returning a NULL pointer.
821</p>
822</dd>
Junio C Hamano18b647e2012-04-24 22:16:19[diff] [blame]823<dt class="hdlist1">
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]824<code>reset_revision_walk</code>
Junio C Hamano18b647e2012-04-24 22:16:19[diff] [blame]825</dt>
826<dd>
827<p>
828 Reset the flags used by the revision walking api. You can use
Junio C Hamanoce806e32013-08-01 20:28:10[diff] [blame]829 this to do multiple sequential revision walks.
Junio C Hamano18b647e2012-04-24 22:16:19[diff] [blame]830</p>
831</dd>
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]832</dl></div>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]833</div>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]834</div>
835<div class="sect1">
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]836<h2 id="_data_structures">Data structures</h2>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]837<div class="sectionbody">
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]838<div class="paragraph"><p>Talk about &lt;revision.h&gt;, things like:</p></div>
839<div class="ulist"><ul>
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]840<li>
841<p>
842two diff_options, one for path limiting, another for output;
843</p>
844</li>
845<li>
846<p>
Junio C Hamano054ea082008-06-01 08:26:34[diff] [blame]847remaining functions;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]848</p>
849</li>
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]850</ul></div>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]851<div class="paragraph"><p>(Linus, JC, Dscho)</p></div>
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]852</div>
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]853</div>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]854</div>
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]855<div id="footnotes"><hr /></div>
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]856<div id="footer">
857<div id="footer-text">
Junio C Hamano683a8612013-08-23 20:50:09[diff] [blame]858Last updated 2013-08-20 08:40:27 PDT
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]859</div>
860</div>
861</body>
862</html>