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5 <meta http-equiv=
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6 <meta name=
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7 <title>gitnamespaces(
7)
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436 <script type=
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439 var asciidoc
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441 /////////////////////////////////////////////////////////////////////
442 // Table Of Contents generator
443 /////////////////////////////////////////////////////////////////////
445 /* Author: Mihai Bazon, September 2002
446 * http://students.infoiasi.ro/~mishoo
448 * Table Of Content generator
451 * Feel free to use this script under the terms of the GNU General Public
452 * License, as long as you do not remove or alter this notice.
455 /* modified by Troy D. Hanson, September 2006. License: GPL */
456 /* modified by Stuart Rackham, 2006, 2009. License: GPL */
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518 /////////////////////////////////////////////////////////////////////
519 // Footnotes generator
520 /////////////////////////////////////////////////////////////////////
522 /* Based on footnote generation code from:
523 * http://www.brandspankingnew.net/archive/2005/07/format_footnote.html
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573 gitnamespaces(
7) Manual Page
576 <div class=
"sectionbody">
583 <h2 id=
"_synopsis">SYNOPSIS
</h2>
584 <div class=
"sectionbody">
585 <div class=
"verseblock">
586 <div class=
"verseblock-content">GIT_NAMESPACE=
<namespace
> <em>git upload-pack
</em>
587 GIT_NAMESPACE=
<namespace
> <em>git receive-pack
</em></div>
588 <div class=
"verseblock-attribution">
591 <h2 id=
"_description">DESCRIPTION
</h2>
592 <div class=
"sectionbody">
593 <div class=
"paragraph"><p>Git supports dividing the refs of a single repository into multiple
594 namespaces, each of which has its own branches, tags, and HEAD. Git can
595 expose each namespace as an independent repository to pull from and push
596 to, while sharing the object store, and exposing all the refs to
597 operations such as
<a href=
"git-gc.html">git-gc(
1)
</a>.
</p></div>
598 <div class=
"paragraph"><p>Storing multiple repositories as namespaces of a single repository
599 avoids storing duplicate copies of the same objects, such as when
600 storing multiple branches of the same source. The alternates mechanism
601 provides similar support for avoiding duplicates, but alternates do not
602 prevent duplication between new objects added to the repositories
603 without ongoing maintenance, while namespaces do.
</p></div>
604 <div class=
"paragraph"><p>To specify a namespace, set the
<tt>GIT_NAMESPACE
</tt> environment variable to
605 the namespace. For each ref namespace, git stores the corresponding
606 refs in a directory under
<tt>refs/namespaces/
</tt>. For example,
607 <tt>GIT_NAMESPACE=foo
</tt> will store refs under
<tt>refs/namespaces/foo/
</tt>. You
608 can also specify namespaces via the
<tt>--namespace
</tt> option to
609 <a href=
"git.html">git(
1)
</a>.
</p></div>
610 <div class=
"paragraph"><p>Note that namespaces which include a
<tt>/
</tt> will expand to a hierarchy of
611 namespaces; for example,
<tt>GIT_NAMESPACE=foo/bar
</tt> will store refs under
612 <tt>refs/namespaces/foo/refs/namespaces/bar/
</tt>. This makes paths in
613 <tt>GIT_NAMESPACE
</tt> behave hierarchically, so that cloning with
614 <tt>GIT_NAMESPACE=foo/bar
</tt> produces the same result as cloning with
615 <tt>GIT_NAMESPACE=foo
</tt> and cloning from that repo with
<tt>GIT_NAMESPACE=bar
</tt>. It
616 also avoids ambiguity with strange namespace paths such as
<tt>foo/refs/heads/
</tt>,
617 which could otherwise generate directory/file conflicts within the
<tt>refs
</tt>
619 <div class=
"paragraph"><p><a href=
"git-upload-pack.html">git-upload-pack(
1)
</a> and
<a href=
"git-receive-pack.html">git-receive-pack(
1)
</a> rewrite the
620 names of refs as specified by
<tt>GIT_NAMESPACE
</tt>. git-upload-pack and
621 git-receive-pack will ignore all references outside the specified
623 <div class=
"paragraph"><p>The smart HTTP server,
<a href=
"git-http-backend.html">git-http-backend(
1)
</a>, will pass
624 GIT_NAMESPACE through to the backend programs; see
625 <a href=
"git-http-backend.html">git-http-backend(
1)
</a> for sample configuration to expose
626 repository namespaces as repositories.
</p></div>
627 <div class=
"paragraph"><p>For a simple local test, you can use
<a href=
"git-remote-ext.html">git-remote-ext(
1)
</a>:
</p></div>
628 <div class=
"listingblock">
629 <div class=
"content">
630 <pre><tt>git clone ext::'git --namespace=foo %s /tmp/prefixed.git'
</tt></pre>
633 <h2 id=
"_security">SECURITY
</h2>
634 <div class=
"sectionbody">
635 <div class=
"paragraph"><p>Anyone with access to any namespace within a repository can potentially
636 access objects from any other namespace stored in the same repository.
637 You can
’t directly say
"give me object ABCD" if you don
’t have a ref to
638 it, but you can do some other sneaky things like:
</p></div>
639 <div class=
"olist arabic"><ol class=
"arabic">
642 Claiming to push ABCD, at which point the server will optimize out the
643 need for you to actually send it. Now you have a ref to ABCD and can
644 fetch it (claiming not to have it, of course).
649 Requesting other refs, claiming that you have ABCD, at which point the
650 server may generate deltas against ABCD.
654 <div class=
"paragraph"><p>None of this causes a problem if you only host public repositories, or
655 if everyone who may read one namespace may also read everything in every
656 other namespace (for instance, if everyone in an organization has read
657 permission to every repository).
</p></div>
660 <div id=
"footnotes"><hr /></div>
662 <div id=
"footer-text">
663 Last updated
2011-
09-
26 21:
22:
29 PDT