/usr/share/doc/git-doc/git-cat-file.html

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<body class="manpage">
<div id="header">
<h1>
git-cat-file(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>git-cat-file -
   Provide content or type and size information for repository objects
</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 cat-file</em> (-t | -s | -e | -p | &lt;type&gt; | --textconv ) &lt;object&gt;
<em>git cat-file</em> (--batch | --batch-check) &lt; &lt;list-of-objects&gt;</pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>In its first form, the command provides the content or the type of an object in
the repository. The type is required unless <em>-t</em> or <em>-p</em> is used to find the
object type, or <em>-s</em> is used to find the object size, or <em>--textconv</em> is used
(which implies type "blob").</p></div>
<div class="paragraph"><p>In the second form, a list of objects (separated by linefeeds) is provided on
stdin, and the SHA-1, type, and size of each object is printed on stdout.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
&lt;object&gt;
</dt>
<dd>
<p>
        The name of the object to show.
        For a more complete list of ways to spell object names, see
        the "SPECIFYING REVISIONS" section in <a href="gitrevisions.html">gitrevisions(7)</a>.
</p>
</dd>
<dt class="hdlist1">
-t
</dt>
<dd>
<p>
        Instead of the content, show the object type identified by
        &lt;object&gt;.
</p>
</dd>
<dt class="hdlist1">
-s
</dt>
<dd>
<p>
        Instead of the content, show the object size identified by
        &lt;object&gt;.
</p>
</dd>
<dt class="hdlist1">
-e
</dt>
<dd>
<p>
        Suppress all output; instead exit with zero status if &lt;object&gt;
        exists and is a valid object.
</p>
</dd>
<dt class="hdlist1">
-p
</dt>
<dd>
<p>
        Pretty-print the contents of &lt;object&gt; based on its type.
</p>
</dd>
<dt class="hdlist1">
&lt;type&gt;
</dt>
<dd>
<p>
        Typically this matches the real type of &lt;object&gt; but asking
        for a type that can trivially be dereferenced from the given
        &lt;object&gt; is also permitted.  An example is to ask for a
        "tree" with &lt;object&gt; being a commit object that contains it,
        or to ask for a "blob" with &lt;object&gt; being a tag object that
        points at it.
</p>
</dd>
<dt class="hdlist1">
--textconv
</dt>
<dd>
<p>
        Show the content as transformed by a textconv filter. In this case,
        &lt;object&gt; has be of the form &lt;tree-ish&gt;:&lt;path&gt;, or :&lt;path&gt; in order
        to apply the filter to the content recorded in the index at &lt;path&gt;.
</p>
</dd>
<dt class="hdlist1">
--batch
</dt>
<dt class="hdlist1">
--batch=&lt;format&gt;
</dt>
<dd>
<p>
        Print object information and contents for each object provided
        on stdin.  May not be combined with any other options or arguments.
        See the section <code>BATCH OUTPUT</code> below for details.
</p>
</dd>
<dt class="hdlist1">
--batch-check
</dt>
<dt class="hdlist1">
--batch-check=&lt;format&gt;
</dt>
<dd>
<p>
        Print object information for each object provided on stdin.  May
        not be combined with any other options or arguments.  See the
        section <code>BATCH OUTPUT</code> below for details.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_output">OUTPUT</h2>
<div class="sectionbody">
<div class="paragraph"><p>If <em>-t</em> is specified, one of the &lt;type&gt;.</p></div>
<div class="paragraph"><p>If <em>-s</em> is specified, the size of the &lt;object&gt; in bytes.</p></div>
<div class="paragraph"><p>If <em>-e</em> is specified, no output.</p></div>
<div class="paragraph"><p>If <em>-p</em> is specified, the contents of &lt;object&gt; are pretty-printed.</p></div>
<div class="paragraph"><p>If &lt;type&gt; is specified, the raw (though uncompressed) contents of the &lt;object&gt;
will be returned.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_batch_output">BATCH OUTPUT</h2>
<div class="sectionbody">
<div class="paragraph"><p>If <code>--batch</code> or <code>--batch-check</code> is given, <code>cat-file</code> will read objects
from stdin, one per line, and print information about them. By default,
the whole line is considered as an object, as if it were fed to
<a href="git-rev-parse.html">git-rev-parse(1)</a>.</p></div>
<div class="paragraph"><p>You can specify the information shown for each object by using a custom
<code>&lt;format&gt;</code>. The <code>&lt;format&gt;</code> is copied literally to stdout for each
object, with placeholders of the form <code>%(atom)</code> expanded, followed by a
newline. The available atoms are:</p></div>
<div class="dlist"><dl>
<dt class="hdlist1">
<code>objectname</code>
</dt>
<dd>
<p>
        The 40-hex object name of the object.
</p>
</dd>
<dt class="hdlist1">
<code>objecttype</code>
</dt>
<dd>
<p>
        The type of of the object (the same as <code>cat-file -t</code> reports).
</p>
</dd>
<dt class="hdlist1">
<code>objectsize</code>
</dt>
<dd>
<p>
        The size, in bytes, of the object (the same as <code>cat-file -s</code>
        reports).
</p>
</dd>
<dt class="hdlist1">
<code>objectsize:disk</code>
</dt>
<dd>
<p>
        The size, in bytes, that the object takes up on disk. See the
        note about on-disk sizes in the <code>CAVEATS</code> section below.
</p>
</dd>
<dt class="hdlist1">
<code>deltabase</code>
</dt>
<dd>
<p>
        If the object is stored as a delta on-disk, this expands to the
        40-hex sha1 of the delta base object. Otherwise, expands to the
        null sha1 (40 zeroes). See <code>CAVEATS</code> below.
</p>
</dd>
<dt class="hdlist1">
<code>rest</code>
</dt>
<dd>
<p>
        If this atom is used in the output string, input lines are split
        at the first whitespace boundary. All characters before that
        whitespace are considered to be the object name; characters
        after that first run of whitespace (i.e., the "rest" of the
        line) are output in place of the <code>%(rest)</code> atom.
</p>
</dd>
</dl></div>
<div class="paragraph"><p>If no format is specified, the default format is <code>%(objectname)
%(objecttype) %(objectsize)</code>.</p></div>
<div class="paragraph"><p>If <code>--batch</code> is specified, the object information is followed by the
object contents (consisting of <code>%(objectsize)</code> bytes), followed by a
newline.</p></div>
<div class="paragraph"><p>For example, <code>--batch</code> without a custom format would produce:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>&lt;sha1&gt; SP &lt;type&gt; SP &lt;size&gt; LF
&lt;contents&gt; LF</code></pre>
</div></div>
<div class="paragraph"><p>Whereas <code>--batch-check='%(objectname) %(objecttype)'</code> would produce:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>&lt;sha1&gt; SP &lt;type&gt; LF</code></pre>
</div></div>
<div class="paragraph"><p>If a name is specified on stdin that cannot be resolved to an object in
the repository, then <code>cat-file</code> will ignore any custom format and print:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>&lt;object&gt; SP missing LF</code></pre>
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_caveats">CAVEATS</h2>
<div class="sectionbody">
<div class="paragraph"><p>Note that the sizes of objects on disk are reported accurately, but care
should be taken in drawing conclusions about which refs or objects are
responsible for disk usage. The size of a packed non-delta object may be
much larger than the size of objects which delta against it, but the
choice of which object is the base and which is the delta is arbitrary
and is subject to change during a repack.</p></div>
<div class="paragraph"><p>Note also that multiple copies of an object may be present in the object
database; in this case, it is undefined which copy&#8217;s size or delta base
will be reported.</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>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated
 2014-12-18 18:42:18 UTC
</div>
</div>
</body>
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git-doc 1:2.1.4-2.1+deb8u6 / usr / share / doc / git-doc / git-cat-file.html
