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<h1>
git-check-ref-format(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>git-check-ref-format -
   Ensures that a reference name is well formed
</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 check-ref-format</em> [--normalize]
       [--[no-]allow-onelevel] [--refspec-pattern]
       &lt;refname&gt;
<em>git check-ref-format</em> --branch &lt;branchname-shorthand&gt;</pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>Checks if a given <em>refname</em> is acceptable, and exits with a non-zero
status if it is not.</p></div>
<div class="paragraph"><p>A reference is used in Git to specify branches and tags.  A
branch head is stored in the <code>refs/heads</code> hierarchy, while
a tag is stored in the <code>refs/tags</code> hierarchy of the ref namespace
(typically in <code>$GIT_DIR/refs/heads</code> and <code>$GIT_DIR/refs/tags</code>
directories or, as entries in file <code>$GIT_DIR/packed-refs</code>
if refs are packed by <code>git gc</code>).</p></div>
<div class="paragraph"><p>Git imposes the following rules on how references are named:</p></div>
<div class="olist arabic"><ol class="arabic">
<li>
<p>
They can include slash <code>/</code> for hierarchical (directory)
  grouping, but no slash-separated component can begin with a
  dot <code>.</code> or end with the sequence <code>.lock</code>.
</p>
</li>
<li>
<p>
They must contain at least one <code>/</code>. This enforces the presence of a
  category like <code>heads/</code>, <code>tags/</code> etc. but the actual names are not
  restricted.  If the <code>--allow-onelevel</code> option is used, this rule
  is waived.
</p>
</li>
<li>
<p>
They cannot have two consecutive dots <code>..</code> anywhere.
</p>
</li>
<li>
<p>
They cannot have ASCII control characters (i.e. bytes whose
  values are lower than \040, or \177 <code>DEL</code>), space, tilde <code>~</code>,
  caret <code>^</code>, or colon <code>:</code> anywhere.
</p>
</li>
<li>
<p>
They cannot have question-mark <code>?</code>, asterisk <code>*</code>, or open
  bracket <code>[</code> anywhere.  See the <code>--refspec-pattern</code> option below for
  an exception to this rule.
</p>
</li>
<li>
<p>
They cannot begin or end with a slash <code>/</code> or contain multiple
  consecutive slashes (see the <code>--normalize</code> option below for an
  exception to this rule)
</p>
</li>
<li>
<p>
They cannot end with a dot <code>.</code>.
</p>
</li>
<li>
<p>
They cannot contain a sequence <code>@{</code>.
</p>
</li>
<li>
<p>
They cannot contain a <code>\</code>.
</p>
</li>
</ol></div>
<div class="paragraph"><p>These rules make it easy for shell script based tools to parse
reference names, pathname expansion by the shell when a reference name is used
unquoted (by mistake), and also avoids ambiguities in certain
reference name expressions (see <a href="gitrevisions.html">gitrevisions(7)</a>):</p></div>
<div class="olist arabic"><ol class="arabic">
<li>
<p>
A double-dot <code>..</code> is often used as in <code>ref1..ref2</code>, and in some
  contexts this notation means <code>^ref1 ref2</code> (i.e. not in
  <code>ref1</code> and in <code>ref2</code>).
</p>
</li>
<li>
<p>
A tilde <code>~</code> and caret <code>^</code> are used to introduce the postfix
  <em>nth parent</em> and <em>peel onion</em> operation.
</p>
</li>
<li>
<p>
A colon <code>:</code> is used as in <code>srcref:dstref</code> to mean "use srcref&#8217;s
  value and store it in dstref" in fetch and push operations.
  It may also be used to select a specific object such as with
  <em>git cat-file</em>: "git cat-file blob v1.3.3:refs.c".
</p>
</li>
<li>
<p>
at-open-brace <code>@{</code> is used as a notation to access a reflog entry.
</p>
</li>
</ol></div>
<div class="paragraph"><p>With the <code>--branch</code> option, it expands the &#8220;previous branch syntax&#8221;
<code>@{-n}</code>.  For example, <code>@{-1}</code> is a way to refer the last branch you
were on.  This option should be used by porcelains to accept this
syntax anywhere a branch name is expected, so they can act as if you
typed the branch name.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
--[no-]allow-onelevel
</dt>
<dd>
<p>
        Controls whether one-level refnames are accepted (i.e.,
        refnames that do not contain multiple <code>/</code>-separated
        components).  The default is <code>--no-allow-onelevel</code>.
</p>
</dd>
<dt class="hdlist1">
--refspec-pattern
</dt>
<dd>
<p>
        Interpret &lt;refname&gt; as a reference name pattern for a refspec
        (as used with remote repositories).  If this option is
        enabled, &lt;refname&gt; is allowed to contain a single <code>*</code>
        in place of a one full pathname component (e.g.,
        <code>foo/*/bar</code> but not <code>foo/bar*</code>).
</p>
</dd>
<dt class="hdlist1">
--normalize
</dt>
<dd>
<p>
        Normalize <em>refname</em> by removing any leading slash (<code>/</code>)
        characters and collapsing runs of adjacent slashes between
        name components into a single slash.  Iff the normalized
        refname is valid then print it to standard output and exit
        with a status of 0.  (<code>--print</code> is a deprecated way to spell
        <code>--normalize</code>.)
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">EXAMPLES</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
Print the name of the previous branch:
</p>
<div class="listingblock">
<div class="content">
<pre><code>$ git check-ref-format --branch @{-1}</code></pre>
</div></div>
</li>
<li>
<p>
Determine the reference name to use for a new branch:
</p>
<div class="listingblock">
<div class="content">
<pre><code>$ ref=$(git check-ref-format --normalize "refs/heads/$newbranch") ||
die "we do not like '$newbranch' as a branch name."</code></pre>
</div></div>
</li>
</ul></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 2013-06-10 20:01:55 UTC
</div>
</div>
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