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git-bundle.html
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<!DOCTYPE html>
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<meta name="generator" content="Asciidoctor 2.0.20"/>
<title>git-bundle(1)</title>
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<body class="manpage">
<div id="header">
<h1>git-bundle(1) Manual Page</h1>
<h2 id="_name">NAME</h2>
<div class="sectionbody">
<p>git-bundle - Move objects and refs by archive</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 bundle</em> create [-q | --quiet | --progress]
[--version=<version>] <file> <git-rev-list-args>
<em>git bundle</em> verify [-q | --quiet] <file>
<em>git bundle</em> list-heads <file> [<refname>…​]
<em>git bundle</em> unbundle [--progress] <file> [<refname>…​]</pre>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Create, unpack, and manipulate "bundle" files. Bundles are used for
the "offline" transfer of Git objects without an active "server"
sitting on the other side of the network connection.</p>
</div>
<div class="paragraph">
<p>They can be used to create both incremental and full backups of a
repository, and to relay the state of the references in one repository
to another.</p>
</div>
<div class="paragraph">
<p>Git commands that fetch or otherwise "read" via protocols such as
<code>ssh://</code> and <code>https://</code> can also operate on bundle files. It is
possible <a href="git-clone.html">git-clone(1)</a> a new repository from a bundle, to use
<a href="git-fetch.html">git-fetch(1)</a> to fetch from one, and to list the references
contained within it with <a href="git-ls-remote.html">git-ls-remote(1)</a>. There’s no
corresponding "write" support, i.e.a <em>git push</em> into a bundle is not
supported.</p>
</div>
<div class="paragraph">
<p>See the "EXAMPLES" section below for examples of how to use bundles.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_bundle_format">BUNDLE FORMAT</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Bundles are <code>.pack</code> files (see <a href="git-pack-objects.html">git-pack-objects(1)</a>) with a
header indicating what references are contained within the bundle.</p>
</div>
<div class="paragraph">
<p>Like the packed archive format itself bundles can either be
self-contained, or be created using exclusions.
See the "OBJECT PREREQUISITES" section below.</p>
</div>
<div class="paragraph">
<p>Bundles created using revision exclusions are "thin packs" created
using the <code>--thin</code> option to <a href="git-pack-objects.html">git-pack-objects(1)</a>, and
unbundled using the <code>--fix-thin</code> option to <a href="git-index-pack.html">git-index-pack(1)</a>.</p>
</div>
<div class="paragraph">
<p>There is no option to create a "thick pack" when using revision
exclusions, and users should not be concerned about the difference. By
using "thin packs", bundles created using exclusions are smaller in
size. That they’re "thin" under the hood is merely noted here as a
curiosity, and as a reference to other documentation.</p>
</div>
<div class="paragraph">
<p>See <a href="gitformat-bundle.html">gitformat-bundle(5)</a> for more details and the discussion of
"thin pack" in <a href="gitformat-pack.html">gitformat-pack(5)</a> for further details.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist">
<dl>
<dt class="hdlist1">create [options] <file> <git-rev-list-args></dt>
<dd>
<p>Used to create a bundle named <em>file</em>. This requires the
<em><git-rev-list-args></em> arguments to define the bundle contents.
<em>options</em> contains the options specific to the <em>git bundle create</em>
subcommand. If <em>file</em> is <code>-</code>, the bundle is written to stdout.</p>
</dd>
<dt class="hdlist1">verify <file></dt>
<dd>
<p>Used to check that a bundle file is valid and will apply
cleanly to the current repository. This includes checks on the
bundle format itself as well as checking that the prerequisite
commits exist and are fully linked in the current repository.
Then, <em>git bundle</em> prints a list of missing commits, if any.
Finally, information about additional capabilities, such as "object
filter", is printed. See "Capabilities" in <a href="gitformat-bundle.html">gitformat-bundle(5)</a>
for more information. The exit code is zero for success, but will
be nonzero if the bundle file is invalid. If <em>file</em> is <code>-</code>, the
bundle is read from stdin.</p>
</dd>
<dt class="hdlist1">list-heads <file></dt>
<dd>
<p>Lists the references defined in the bundle. If followed by a
list of references, only references matching those given are
printed out. If <em>file</em> is <code>-</code>, the bundle is read from stdin.</p>
</dd>
<dt class="hdlist1">unbundle <file></dt>
<dd>
<p>Passes the objects in the bundle to <em>git index-pack</em>
for storage in the repository, then prints the names of all
defined references. If a list of references is given, only
references matching those in the list are printed. This command is
really plumbing, intended to be called only by <em>git fetch</em>.
If <em>file</em> is <code>-</code>, the bundle is read from stdin.</p>
</dd>
<dt class="hdlist1"><git-rev-list-args></dt>
<dd>
<p>A list of arguments, acceptable to <em>git rev-parse</em> and
<em>git rev-list</em> (and containing a named ref, see SPECIFYING REFERENCES
below), that specifies the specific objects and references
to transport. For example, <code>master~10..master</code> causes the
current master reference to be packaged along with all objects
added since its 10th ancestor commit. There is no explicit
limit to the number of references and objects that may be
packaged.</p>
</dd>
<dt class="hdlist1">[<refname>…​]</dt>
<dd>
<p>A list of references used to limit the references reported as
available. This is principally of use to <em>git fetch</em>, which
expects to receive only those references asked for and not
necessarily everything in the pack (in this case, <em>git bundle</em> acts
like <em>git fetch-pack</em>).</p>
</dd>
<dt class="hdlist1">--progress</dt>
<dd>
<p>Progress status is reported on the standard error stream
by default when it is attached to a terminal, unless -q
is specified. This flag forces progress status even if
the standard error stream is not directed to a terminal.</p>
</dd>
<dt class="hdlist1">--version=<version></dt>
<dd>
<p>Specify the bundle version. Version 2 is the older format and can only be
used with SHA-1 repositories; the newer version 3 contains capabilities that
permit extensions. The default is the oldest supported format, based on the
hash algorithm in use.</p>
</dd>
<dt class="hdlist1">-q</dt>
<dt class="hdlist1">--quiet</dt>
<dd>
<p>This flag makes the command not to report its progress
on the standard error stream.</p>
</dd>
</dl>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_specifying_references">SPECIFYING REFERENCES</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Revisions must be accompanied by reference names to be packaged in a
bundle.</p>
</div>
<div class="paragraph">
<p>More than one reference may be packaged, and more than one set of prerequisite objects can
be specified. The objects packaged are those not contained in the
union of the prerequisites.</p>
</div>
<div class="paragraph">
<p>The <em>git bundle create</em> command resolves the reference names for you
using the same rules as <code>git rev-parse --abbrev-ref=loose</code>. Each
prerequisite can be specified explicitly (e.g. <code>^master~10</code>), or implicitly
(e.g. <code>master~10..master</code>, <code>--since=10.days.ago master</code>).</p>
</div>
<div class="paragraph">
<p>All of these simple cases are OK (assuming we have a "master" and
"next" branch):</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bundle create master.bundle master
$ echo master | git bundle create master.bundle --stdin
$ git bundle create master-and-next.bundle master next
$ (echo master; echo next) | git bundle create master-and-next.bundle --stdin</pre>
</div>
</div>
<div class="paragraph">
<p>And so are these (and the same but omitted <code>--stdin</code> examples):</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bundle create recent-master.bundle master~10..master
$ git bundle create recent-updates.bundle master~10..master next~5..next</pre>
</div>
</div>
<div class="paragraph">
<p>A revision name or a range whose right-hand-side cannot be resolved to
a reference is not accepted:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bundle create HEAD.bundle $(git rev-parse HEAD)
fatal: Refusing to create empty bundle.
$ git bundle create master-yesterday.bundle master~10..master~5
fatal: Refusing to create empty bundle.</pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_object_prerequisites">OBJECT PREREQUISITES</h2>
<div class="sectionbody">
<div class="paragraph">
<p>When creating bundles it is possible to create a self-contained bundle
that can be unbundled in a repository with no common history, as well
as providing negative revisions to exclude objects needed in the
earlier parts of the history.</p>
</div>
<div class="paragraph">
<p>Feeding a revision such as <code>new</code> to <code>git bundle create</code> will create a
bundle file that contains all the objects reachable from the revision
<code>new</code>. That bundle can be unbundled in any repository to obtain a full
history that leads to the revision <code>new</code>:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bundle create full.bundle new</pre>
</div>
</div>
<div class="paragraph">
<p>A revision range such as <code>old..new</code> will produce a bundle file that
will require the revision <code>old</code> (and any objects reachable from it)
to exist for the bundle to be "unbundle"-able:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bundle create full.bundle old..new</pre>
</div>
</div>
<div class="paragraph">
<p>A self-contained bundle without any prerequisites can be extracted
into anywhere, even into an empty repository, or be cloned from
(i.e., <code>new</code>, but not <code>old..new</code>).</p>
</div>
<div class="paragraph">
<p>It is okay to err on the side of caution, causing the bundle file
to contain objects already in the destination, as these are ignored
when unpacking at the destination.</p>
</div>
<div class="paragraph">
<p>If you want to match <code>git clone --mirror</code>, which would include your
refs such as <code>refs/remotes/*</code>, use <code>--all</code>.
If you want to provide the same set of refs that a clone directly
from the source repository would get, use <code>--branches --tags</code> for
the <code><git-rev-list-args></code>.</p>
</div>
<div class="paragraph">
<p>The <em>git bundle verify</em> command can be used to check whether your
recipient repository has the required prerequisite commits for a
bundle.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">EXAMPLES</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Assume you want to transfer the history from a repository R1 on machine A
to another repository R2 on machine B.
For whatever reason, direct connection between A and B is not allowed,
but we can move data from A to B via some mechanism (CD, email, etc.).
We want to update R2 with development made on the branch master in R1.</p>
</div>
<div class="paragraph">
<p>To bootstrap the process, you can first create a bundle that does not have
any prerequisites. You can use a tag to remember up to what commit you last
processed, in order to make it easy to later update the other repository
with an incremental bundle:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>machineA$ cd R1
machineA$ git bundle create file.bundle master
machineA$ git tag -f lastR2bundle master</pre>
</div>
</div>
<div class="paragraph">
<p>Then you transfer file.bundle to the target machine B. Because this
bundle does not require any existing object to be extracted, you can
create a new repository on machine B by cloning from it:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>machineB$ git clone -b master /home/me/tmp/file.bundle R2</pre>
</div>
</div>
<div class="paragraph">
<p>This will define a remote called "origin" in the resulting repository that
lets you fetch and pull from the bundle. The $GIT_DIR/config file in R2 will
have an entry like this:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>[remote "origin"]
url = /home/me/tmp/file.bundle
fetch = refs/heads/*:refs/remotes/origin/*</pre>
</div>
</div>
<div class="paragraph">
<p>To update the resulting mine.git repository, you can fetch or pull after
replacing the bundle stored at /home/me/tmp/file.bundle with incremental
updates.</p>
</div>
<div class="paragraph">
<p>After working some more in the original repository, you can create an
incremental bundle to update the other repository:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>machineA$ cd R1
machineA$ git bundle create file.bundle lastR2bundle..master
machineA$ git tag -f lastR2bundle master</pre>
</div>
</div>
<div class="paragraph">
<p>You then transfer the bundle to the other machine to replace
/home/me/tmp/file.bundle, and pull from it.</p>
</div>
<div class="listingblock">
<div class="content">
<pre>machineB$ cd R2
machineB$ git pull</pre>
</div>
</div>
<div class="paragraph">
<p>If you know up to what commit the intended recipient repository should
have the necessary objects, you can use that knowledge to specify the
prerequisites, giving a cut-off point to limit the revisions and objects that go
in the resulting bundle. The previous example used the lastR2bundle tag
for this purpose, but you can use any other options that you would give to
the <a href="git-log.html">git-log(1)</a> command. Here are more examples:</p>
</div>
<div class="paragraph">
<p>You can use a tag that is present in both:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bundle create mybundle v1.0.0..master</pre>
</div>
</div>
<div class="paragraph">
<p>You can use a prerequisite based on time:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bundle create mybundle --since=10.days master</pre>
</div>
</div>
<div class="paragraph">
<p>You can use the number of commits:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bundle create mybundle -10 master</pre>
</div>
</div>
<div class="paragraph">
<p>You can run <code>git-bundle verify</code> to see if you can extract from a bundle
that was created with a prerequisite:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bundle verify mybundle</pre>
</div>
</div>
<div class="paragraph">
<p>This will list what commits you must have in order to extract from the
bundle and will error out if you do not have them.</p>
</div>
<div class="paragraph">
<p>A bundle from a recipient repository’s point of view is just like a
regular repository which it fetches or pulls from. You can, for example, map
references when fetching:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git fetch mybundle master:localRef</pre>
</div>
</div>
<div class="paragraph">
<p>You can also see what references it offers:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git ls-remote mybundle</pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_file_format">FILE FORMAT</h2>
<div class="sectionbody">
<div class="paragraph">
<p>See <a href="gitformat-bundle.html">gitformat-bundle(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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