git-check-ref-format.html - external/gitster/git-htmldocs - Git at Google

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 <div id="header">
 <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>
 <h2 id="_synopsis">SYNOPSIS</h2>
 <div class="sectionbody">
 <div class="verseblock">
 <div class="verseblock-content"><em>git check-ref-format</em> &lt;refname&gt;
 <em>git check-ref-format</em> --print &lt;refname&gt;
 <em>git check-ref-format</em> --branch &lt;branchname-shorthand&gt;</div>
 <div class="verseblock-attribution">
 </div></div>
 </div>
 <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 <tt>refs/heads</tt> hierarchy, while
 a tag is stored in the <tt>refs/tags</tt> hierarchy of the ref namespace
 (typically in <tt>$GIT_DIR/refs/heads</tt> and <tt>$GIT_DIR/refs/tags</tt>
 directories or, as entries in file <tt>$GIT_DIR/packed-refs</tt>
 if refs are packed by <tt>git gc</tt>).</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 <tt>/</tt> for hierarchical (directory)
  grouping, but no slash-separated component can begin with a
  dot <tt>.</tt>.
 </p>
 </li>
 <li>
 <p>
 They must contain at least one <tt>/</tt>. This enforces the presence of a
  category like <tt>heads/</tt>, <tt>tags/</tt> etc. but the actual names are not
  restricted.
 </p>
 </li>
 <li>
 <p>
 They cannot have two consecutive dots <tt>..</tt> anywhere.
 </p>
 </li>
 <li>
 <p>
 They cannot have ASCII control characters (i.e. bytes whose
  values are lower than \040, or \177 <tt>DEL</tt>), space, tilde <tt>~</tt>,
  caret <tt>&#94;</tt>, colon <tt>:</tt>, question-mark <tt>?</tt>, asterisk <tt>*</tt>,
  or open bracket <tt>[</tt> anywhere.
 </p>
 </li>
 <li>
 <p>
 They cannot end with a slash <tt>/</tt> nor a dot <tt>.</tt>.
 </p>
 </li>
 <li>
 <p>
 They cannot end with the sequence <tt>.lock</tt>.
 </p>
 </li>
 <li>
 <p>
 They cannot contain a sequence <tt>@{</tt>.
 </p>
 </li>
 <li>
 <p>
 They cannot contain a <tt>\</tt>.
 </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 <tt>..</tt> is often used as in <tt>ref1..ref2</tt>, and in some
  contexts this notation means <tt>&#94;ref1 ref2</tt> (i.e. not in
  <tt>ref1</tt> and in <tt>ref2</tt>).
 </p>
 </li>
 <li>
 <p>
 A tilde <tt>~</tt> and caret <tt>&#94;</tt> are used to introduce the postfix
  <em>nth parent</em> and <em>peel onion</em> operation.
 </p>
 </li>
 <li>
 <p>
 A colon <tt>:</tt> is used as in <tt>srcref:dstref</tt> 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 <tt>@{</tt> is used as a notation to access a reflog entry.
 </p>
 </li>
 </ol></div>
 <div class="paragraph"><p>With the <tt>--print</tt> option, if <em>refname</em> is acceptable, it prints the
 canonicalized name of a hypothetical reference with that name. That is,
 it prints <em>refname</em> with any extra <tt>/</tt> characters removed.</p></div>
 <div class="paragraph"><p>With the <tt>--branch</tt> option, it expands the &#8220;previous branch syntax&#8221;
 <tt>@{-n}</tt>. For example, <tt>@{-1}</tt> 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>
 <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><tt>$ git check-ref-format --branch @{-1}</tt></pre>
 </div></div>
 </li>
 <li>
 <p>
 Determine the reference name to use for a new branch:
 </p>
 <div class="listingblock">
 <div class="content">
 <pre><tt>$ ref=$(git check-ref-format --print "refs/heads/$newbranch") ||
 die "we do not like '$newbranch' as a branch name."</tt></pre>
 </div></div>
 </li>
 </ul></div>
 </div>
 <h2 id="_git">GIT</h2>
 <div class="sectionbody">
 <div class="paragraph"><p>Part of the <a href="git.html">git(1)</a> suite</p></div>
 </div>
 <div id="footer">
 <div id="footer-text">
 Last updated 2011-07-13 23:50:41 UTC
 </div>
 </div>
 </body>
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	<div id="header">
	<h1>
	git-check-ref-format(1) Manual Page
	</h1>
	<h2>NAME</h2>
	<div class="sectionbody">
	<p>git-check-ref-format -
	Ensures that a reference name is well formed
	</p>
	</div>
	</div>
	<h2 id="_synopsis">SYNOPSIS</h2>
	<div class="sectionbody">
	<div class="verseblock">
	<div class="verseblock-content"><em>git check-ref-format</em> <refname>
	<em>git check-ref-format</em> --print <refname>
	<em>git check-ref-format</em> --branch <branchname-shorthand></div>
	<div class="verseblock-attribution">
	</div></div>
	</div>
	<h2 id="_description">DESCRIPTION</h2>
	<div class="sectionbody">
	<div class="paragraph"><p>Checks if a given <em>refname</em> is acceptable, and exits with a non-zero
	status if it is not.</p></div>
	<div class="paragraph"><p>A reference is used in git to specify branches and tags. A
	branch head is stored in the <tt>refs/heads</tt> hierarchy, while
	a tag is stored in the <tt>refs/tags</tt> hierarchy of the ref namespace
	(typically in <tt>$GIT_DIR/refs/heads</tt> and <tt>$GIT_DIR/refs/tags</tt>
	directories or, as entries in file <tt>$GIT_DIR/packed-refs</tt>
	if refs are packed by <tt>git gc</tt>).</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 <tt>/</tt> for hierarchical (directory)
	grouping, but no slash-separated component can begin with a
	dot <tt>.</tt>.
	</p>
	</li>
	<li>
	<p>
	They must contain at least one <tt>/</tt>. This enforces the presence of a
	category like <tt>heads/</tt>, <tt>tags/</tt> etc. but the actual names are not
	restricted.
	</p>
	</li>
	<li>
	<p>
	They cannot have two consecutive dots <tt>..</tt> anywhere.
	</p>
	</li>
	<li>
	<p>
	They cannot have ASCII control characters (i.e. bytes whose
	values are lower than \040, or \177 <tt>DEL</tt>), space, tilde <tt>~</tt>,
	caret <tt>^</tt>, colon <tt>:</tt>, question-mark <tt>?</tt>, asterisk <tt>*</tt>,
	or open bracket <tt>[</tt> anywhere.
	</p>
	</li>
	<li>
	<p>
	They cannot end with a slash <tt>/</tt> nor a dot <tt>.</tt>.
	</p>
	</li>
	<li>
	<p>
	They cannot end with the sequence <tt>.lock</tt>.
	</p>
	</li>
	<li>
	<p>
	They cannot contain a sequence <tt>@{</tt>.
	</p>
	</li>
	<li>
	<p>
	They cannot contain a <tt>\</tt>.
	</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 <tt>..</tt> is often used as in <tt>ref1..ref2</tt>, and in some
	contexts this notation means <tt>^ref1 ref2</tt> (i.e. not in
	<tt>ref1</tt> and in <tt>ref2</tt>).
	</p>
	</li>
	<li>
	<p>
	A tilde <tt>~</tt> and caret <tt>^</tt> are used to introduce the postfix
	<em>nth parent</em> and <em>peel onion</em> operation.
	</p>
	</li>
	<li>
	<p>
	A colon <tt>:</tt> is used as in <tt>srcref:dstref</tt> to mean "use srcref’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 <tt>@{</tt> is used as a notation to access a reflog entry.
	</p>
	</li>
	</ol></div>
	<div class="paragraph"><p>With the <tt>--print</tt> option, if <em>refname</em> is acceptable, it prints the
	canonicalized name of a hypothetical reference with that name. That is,
	it prints <em>refname</em> with any extra <tt>/</tt> characters removed.</p></div>
	<div class="paragraph"><p>With the <tt>--branch</tt> option, it expands the “previous branch syntax”
	<tt>@{-n}</tt>. For example, <tt>@{-1}</tt> 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>
	<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><tt>$ git check-ref-format --branch @{-1}</tt></pre>
	</div></div>
	</li>
	<li>
	<p>
	Determine the reference name to use for a new branch:
	</p>
	<div class="listingblock">
	<div class="content">
	<pre><tt>$ ref=$(git check-ref-format --print "refs/heads/$newbranch") \|\|
	die "we do not like '$newbranch' as a branch name."</tt></pre>
	</div></div>
	</li>
	</ul></div>
	</div>
	<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 id="footer">
	<div id="footer-text">
	Last updated 2011-07-13 23:50:41 UTC
	</div>
	</div>
	</body>
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