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git-commit-graph.html
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
<meta name="generator" content="AsciiDoc 10.2.0" />
<title>git-commit-graph(1)</title>
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margin-bottom: 2.0em;
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span.red { color: red; }
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/*
* xhtml11 specific
*
* */
div.tableblock {
margin-top: 1.0em;
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}
p.table {
margin-top: 0;
}
/* Because the table frame attribute is overridden by CSS in most browsers. */
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/*
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padding-top: 0.5em;
padding-bottom: 0.5em;
border-top: 2px solid silver;
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}
body.manpage h2 {
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}
body.manpage div.sectionbody {
margin-left: 3em;
}
@media print {
body.manpage div#toc { display: none; }
}
</style>
<script type="text/javascript">
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// Function that scans the DOM tree for header elements (the DOM2
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<body class="manpage">
<div id="header">
<h1>
git-commit-graph(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>git-commit-graph -
Write and verify Git commit-graph files
</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 commit-graph verify</em> [--object-dir <dir>] [--shallow] [--[no-]progress]
<em>git commit-graph write</em> [--object-dir <dir>] [--append]
[--split[=<strategy>]] [--reachable | --stdin-packs | --stdin-commits]
[--changed-paths] [--[no-]max-new-filters <n>] [--[no-]progress]
<split-options></pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>Manage the serialized commit-graph file.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
--object-dir
</dt>
<dd>
<p>
Use given directory for the location of packfiles and commit-graph
file. This parameter exists to specify the location of an alternate
that only has the objects directory, not a full <code>.git</code> directory. The
commit-graph file is expected to be in the <code><dir>/info</code> directory and
the packfiles are expected to be in <code><dir>/pack</code>. If the directory
could not be made into an absolute path, or does not match any known
object directory, <code>git commit-graph ...</code> will exit with non-zero
status.
</p>
</dd>
<dt class="hdlist1">
--[no-]progress
</dt>
<dd>
<p>
Turn progress on/off explicitly. If neither is specified, progress is
shown if standard error is connected to a terminal.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_commands">COMMANDS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
<em>write</em>
</dt>
<dd>
<p>
Write a commit-graph file based on the commits found in packfiles. If
the config option <code>core.commitGraph</code> is disabled, then this command will
output a warning, then return success without writing a commit-graph file.
</p>
<div class="paragraph"><p>With the <code>--stdin-packs</code> option, generate the new commit graph by
walking objects only in the specified pack-indexes. (Cannot be combined
with <code>--stdin-commits</code> or <code>--reachable</code>.)</p></div>
<div class="paragraph"><p>With the <code>--stdin-commits</code> option, generate the new commit graph by
walking commits starting at the commits specified in stdin as a list
of OIDs in hex, one OID per line. OIDs that resolve to non-commits
(either directly, or by peeling tags) are silently ignored. OIDs that
are malformed, or do not exist generate an error. (Cannot be combined
with <code>--stdin-packs</code> or <code>--reachable</code>.)</p></div>
<div class="paragraph"><p>With the <code>--reachable</code> option, generate the new commit graph by walking
commits starting at all refs. (Cannot be combined with <code>--stdin-commits</code>
or <code>--stdin-packs</code>.)</p></div>
<div class="paragraph"><p>With the <code>--append</code> option, include all commits that are present in the
existing commit-graph file.</p></div>
<div class="paragraph"><p>With the <code>--changed-paths</code> option, compute and write information about the
paths changed between a commit and its first parent. This operation can
take a while on large repositories. It provides significant performance gains
for getting history of a directory or a file with <code>git log -- <path></code>. If
this option is given, future commit-graph writes will automatically assume
that this option was intended. Use <code>--no-changed-paths</code> to stop storing this
data.</p></div>
<div class="paragraph"><p>With the <code>--max-new-filters=<n></code> option, generate at most <code>n</code> new Bloom
filters (if <code>--changed-paths</code> is specified). If <code>n</code> is <code>-1</code>, no limit is
enforced. Only commits present in the new layer count against this
limit. To retroactively compute Bloom filters over earlier layers, it is
advised to use <code>--split=replace</code>. Overrides the <code>commitGraph.maxNewFilters</code>
configuration.</p></div>
<div class="paragraph"><p>With the <code>--split[=<strategy>]</code> option, write the commit-graph as a
chain of multiple commit-graph files stored in
<code><dir>/info/commit-graphs</code>. Commit-graph layers are merged based on the
strategy and other splitting options. The new commits not already in the
commit-graph are added in a new "tip" file. This file is merged with the
existing file if the following merge conditions are met:</p></div>
<div class="ulist"><ul>
<li>
<p>
If <code>--split=no-merge</code> is specified, a merge is never performed, and
the remaining options are ignored. <code>--split=replace</code> overwrites the
existing chain with a new one. A bare <code>--split</code> defers to the remaining
options. (Note that merging a chain of commit graphs replaces the
existing chain with a length-1 chain where the first and only
incremental holds the entire graph).
</p>
</li>
<li>
<p>
If <code>--size-multiple=<X></code> is not specified, let <code>X</code> equal 2. If the new
tip file would have <code>N</code> commits and the previous tip has <code>M</code> commits and
<code>X</code> times <code>N</code> is greater than <code>M</code>, instead merge the two files into a
single file.
</p>
</li>
<li>
<p>
If <code>--max-commits=<M></code> is specified with <code>M</code> a positive integer, and the
new tip file would have more than <code>M</code> commits, then instead merge the new
tip with the previous tip.
</p>
<div class="paragraph"><p>Finally, if <code>--expire-time=<datetime></code> is not specified, let <code>datetime</code>
be the current time. After writing the split commit-graph, delete all
unused commit-graph whose modified times are older than <code>datetime</code>.</p></div>
</li>
</ul></div>
</dd>
<dt class="hdlist1">
<em>verify</em>
</dt>
<dd>
<p>
Read the commit-graph file and verify its contents against the object
database. Used to check for corrupted data.
</p>
<div class="paragraph"><p>With the <code>--shallow</code> option, only check the tip commit-graph file in
a chain of split commit-graphs.</p></div>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">EXAMPLES</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
Write a commit-graph file for the packed commits in your local <code>.git</code>
directory.
</p>
<div class="listingblock">
<div class="content">
<pre><code>$ git commit-graph write</code></pre>
</div></div>
</li>
<li>
<p>
Write a commit-graph file, extending the current commit-graph file
using commits in <code><pack-index></code>.
</p>
<div class="listingblock">
<div class="content">
<pre><code>$ echo <pack-index> | git commit-graph write --stdin-packs</code></pre>
</div></div>
</li>
<li>
<p>
Write a commit-graph file containing all reachable commits.
</p>
<div class="listingblock">
<div class="content">
<pre><code>$ git show-ref -s | git commit-graph write --stdin-commits</code></pre>
</div></div>
</li>
<li>
<p>
Write a commit-graph file containing all commits in the current
commit-graph file along with those reachable from <code>HEAD</code>.
</p>
<div class="listingblock">
<div class="content">
<pre><code>$ git rev-parse HEAD | git commit-graph write --stdin-commits --append</code></pre>
</div></div>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="_configuration">CONFIGURATION</h2>
<div class="sectionbody">
<div class="paragraph"><p>Everything below this line in this section is selectively included
from the <a href="git-config.html">git-config(1)</a> documentation. The content is the same
as what’s found there:</p></div>
<div class="dlist"><dl>
<dt class="hdlist1">
commitGraph.generationVersion
</dt>
<dd>
<p>
Specifies the type of generation number version to use when writing
or reading the commit-graph file. If version 1 is specified, then
the corrected commit dates will not be written or read. Defaults to
2.
</p>
</dd>
<dt class="hdlist1">
commitGraph.maxNewFilters
</dt>
<dd>
<p>
Specifies the default value for the <code>--max-new-filters</code> option of <code>git
commit-graph write</code> (c.f., <a href="git-commit-graph.html">git-commit-graph(1)</a>).
</p>
</dd>
<dt class="hdlist1">
commitGraph.readChangedPaths
</dt>
<dd>
<p>
Deprecated. Equivalent to commitGraph.changedPathsVersion=-1 if true, and
commitGraph.changedPathsVersion=0 if false. (If commitGraph.changedPathVersion
is also set, commitGraph.changedPathsVersion takes precedence.)
</p>
</dd>
<dt class="hdlist1">
commitGraph.changedPathsVersion
</dt>
<dd>
<p>
Specifies the version of the changed-path Bloom filters that Git will read and
write. May be -1, 0, 1, or 2. Note that values greater than 1 may be
incompatible with older versions of Git which do not yet understand
those versions. Use caution when operating in a mixed-version
environment.
</p>
<div class="paragraph"><p>Defaults to -1.</p></div>
<div class="paragraph"><p>If -1, Git will use the version of the changed-path Bloom filters in the
repository, defaulting to 1 if there are none.</p></div>
<div class="paragraph"><p>If 0, Git will not read any Bloom filters, and will write version 1 Bloom
filters when instructed to write.</p></div>
<div class="paragraph"><p>If 1, Git will only read version 1 Bloom filters, and will write version 1
Bloom filters.</p></div>
<div class="paragraph"><p>If 2, Git will only read version 2 Bloom filters, and will write version 2
Bloom filters.</p></div>
<div class="paragraph"><p>See <a href="git-commit-graph.html">git-commit-graph(1)</a> for more information.</p></div>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_file_format">FILE FORMAT</h2>
<div class="sectionbody">
<div class="paragraph"><p>see <a href="gitformat-commit-graph.html">gitformat-commit-graph(5)</a>.</p></div>