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<body class="manpage">
<div id="header">
<h1>git-commit-graph(1) Manual Page</h1>
<h2 id="_name">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 &lt;dir&gt;] [--shallow] [--[no-]progress]
<em>git commit-graph write</em> [--object-dir &lt;dir&gt;] [--append]
                        [--split[=&lt;strategy&gt;]] [--reachable | --stdin-packs | --stdin-commits]
                        [--changed-paths] [--[no-]max-new-filters &lt;n&gt;] [--[no-]progress]
                        &lt;split-options&gt;</pre>
</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 <em>&lt;dir&gt;</em><code>/info</code> directory and
the packfiles are expected to be in <em>&lt;dir&gt;</em><code>/pack</code>. If the directory
could not be made into an absolute path, or does not match any known
object directory, <code>git</code> <code>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</code> <code>log</code> <code>--</code> <em>&lt;path&gt;</em>. 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=</code><em>&lt;n&gt;</em> 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</code>[<code>=</code><em>&lt;strategy&gt;</em>] option, write the commit-graph as a
chain of multiple commit-graph files stored in
<em>&lt;dir&gt;</em><code>/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=</code><em>&lt;X&gt;</em> 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=</code><em>&lt;M&gt;</em> 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=</code><em>&lt;datetime&gt;</em> 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>$ git commit-graph write</pre>
</div>
</div>
</li>
<li>
<p>Write a commit-graph file, extending the current commit-graph file
using commits in <em>&lt;pack-index&gt;</em>.</p>
<div class="listingblock">
<div class="content">
<pre>$ echo &lt;pack-index&gt; | git commit-graph write --stdin-packs</pre>
</div>
</div>
</li>
<li>
<p>Write a commit-graph file containing all reachable commits.</p>
<div class="listingblock">
<div class="content">
<pre>$ git show-ref -s | git commit-graph write --stdin-commits</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>$ git rev-parse HEAD | git commit-graph write --stdin-commits --append</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&#8217;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</code>
<code>commit-graph</code> <code>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>
</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>
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<div id="footer-text">
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