git-pack-objects.html - external/gitster/git-htmldocs - Git at Google

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 <body class="manpage">
 <div id="header">
 <h1>
 git-pack-objects(1) Manual Page
 </h1>
 <h2>NAME</h2>
 <div class="sectionbody">
 <p>git-pack-objects -
  Create a packed archive of 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 pack-objects</em> [-q | --progress | --all-progress] [--all-progress-implied]
  [--no-reuse-delta] [--delta-base-offset] [--non-empty]
  [--local] [--incremental] [--window=&lt;n&gt;] [--depth=&lt;n&gt;]
  [--revs [--unpacked | --all]] [--stdout | base-name]
  [--keep-true-parents] &lt; object-list</pre>
 <div class="attribution">
 </div></div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_description">DESCRIPTION</h2>
 <div class="sectionbody">
 <div class="paragraph"><p>Reads list of objects from the standard input, and writes a packed
 archive with specified base-name, or to the standard output.</p></div>
 <div class="paragraph"><p>A packed archive is an efficient way to transfer a set of objects
 between two repositories as well as an access efficient archival
 format. In a packed archive, an object is either stored as a
 compressed whole or as a difference from some other object.
 The latter is often called a delta.</p></div>
 <div class="paragraph"><p>The packed archive format (.pack) is designed to be self-contained
 so that it can be unpacked without any further information. Therefore,
 each object that a delta depends upon must be present within the pack.</p></div>
 <div class="paragraph"><p>A pack index file (.idx) is generated for fast, random access to the
 objects in the pack. Placing both the index file (.idx) and the packed
 archive (.pack) in the pack/ subdirectory of $GIT_OBJECT_DIRECTORY (or
 any of the directories on $GIT_ALTERNATE_OBJECT_DIRECTORIES)
 enables Git to read from the pack archive.</p></div>
 <div class="paragraph"><p>The <em>git unpack-objects</em> command can read the packed archive and
 expand the objects contained in the pack into "one-file
 one-object" format; this is typically done by the smart-pull
 commands when a pack is created on-the-fly for efficient network
 transport by their peers.</p></div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_options">OPTIONS</h2>
 <div class="sectionbody">
 <div class="dlist"><dl>
 <dt class="hdlist1">
 base-name
 </dt>
 <dd>
 <p>
  Write into a pair of files (.pack and .idx), using
  &lt;base-name&gt; to determine the name of the created file.
  When this option is used, the two files are written in
  &lt;base-name&gt;-&lt;SHA-1&gt;.{pack,idx} files. &lt;SHA-1&gt; is a hash
  of the sorted object names to make the resulting filename
  based on the pack content, and written to the standard
  output of the command.
 </p>
 </dd>
 <dt class="hdlist1">
 --stdout
 </dt>
 <dd>
 <p>
  Write the pack contents (what would have been written to
  .pack file) out to the standard output.
 </p>
 </dd>
 <dt class="hdlist1">
 --revs
 </dt>
 <dd>
 <p>
  Read the revision arguments from the standard input, instead of
  individual object names. The revision arguments are processed
  the same way as <em>git rev-list</em> with the <code>--objects</code> flag
  uses its <code>commit</code> arguments to build the list of objects it
  outputs. The objects on the resulting list are packed.
 </p>
 </dd>
 <dt class="hdlist1">
 --unpacked
 </dt>
 <dd>
 <p>
  This implies <code>--revs</code>. When processing the list of
  revision arguments read from the standard input, limit
  the objects packed to those that are not already packed.
 </p>
 </dd>
 <dt class="hdlist1">
 --all
 </dt>
 <dd>
 <p>
  This implies <code>--revs</code>. In addition to the list of
  revision arguments read from the standard input, pretend
  as if all refs under <code>refs/</code> are specified to be
  included.
 </p>
 </dd>
 <dt class="hdlist1">
 --include-tag
 </dt>
 <dd>
 <p>
  Include unasked-for annotated tags if the object they
  reference was included in the resulting packfile. This
  can be useful to send new tags to native Git clients.
 </p>
 </dd>
 <dt class="hdlist1">
 --window=&lt;n&gt;
 </dt>
 <dt class="hdlist1">
 --depth=&lt;n&gt;
 </dt>
 <dd>
 <p>
  These two options affect how the objects contained in
  the pack are stored using delta compression. The
  objects are first internally sorted by type, size and
  optionally names and compared against the other objects
  within --window to see if using delta compression saves
  space. --depth limits the maximum delta depth; making
  it too deep affects the performance on the unpacker
  side, because delta data needs to be applied that many
  times to get to the necessary object.
  The default value for --window is 10 and --depth is 50.
 </p>
 </dd>
 <dt class="hdlist1">
 --window-memory=&lt;n&gt;
 </dt>
 <dd>
 <p>
  This option provides an additional limit on top of <code>--window</code>;
  the window size will dynamically scale down so as to not take
  up more than <em>&lt;n&gt;</em> bytes in memory. This is useful in
  repositories with a mix of large and small objects to not run
  out of memory with a large window, but still be able to take
  advantage of the large window for the smaller objects. The
  size can be suffixed with "k", "m", or "g".
  <code>--window-memory=0</code> makes memory usage unlimited, which is the
  default.
 </p>
 </dd>
 <dt class="hdlist1">
 --max-pack-size=&lt;n&gt;
 </dt>
 <dd>
 <p>
  Maximum size of each output pack file. The size can be suffixed with
  "k", "m", or "g". The minimum size allowed is limited to 1 MiB.
  If specified, multiple packfiles may be created.
  The default is unlimited, unless the config variable
  <code>pack.packSizeLimit</code> is set.
 </p>
 </dd>
 <dt class="hdlist1">
 --honor-pack-keep
 </dt>
 <dd>
 <p>
  This flag causes an object already in a local pack that
  has a .keep file to be ignored, even if it would have
  otherwise been packed.
 </p>
 </dd>
 <dt class="hdlist1">
 --incremental
 </dt>
 <dd>
 <p>
  This flag causes an object already in a pack to be ignored
  even if it would have otherwise been packed.
 </p>
 </dd>
 <dt class="hdlist1">
 --local
 </dt>
 <dd>
 <p>
  This flag causes an object that is borrowed from an alternate
  object store to be ignored even if it would have otherwise been
  packed.
 </p>
 </dd>
 <dt class="hdlist1">
 --non-empty
 </dt>
 <dd>
 <p>
  Only create a packed archive if it would contain at
  least one object.
 </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">
 --all-progress
 </dt>
 <dd>
 <p>
  When --stdout is specified then progress report is
  displayed during the object count and compression phases
  but inhibited during the write-out phase. The reason is
  that in some cases the output stream is directly linked
  to another command which may wish to display progress
  status of its own as it processes incoming pack data.
  This flag is like --progress except that it forces progress
  report for the write-out phase as well even if --stdout is
  used.
 </p>
 </dd>
 <dt class="hdlist1">
 --all-progress-implied
 </dt>
 <dd>
 <p>
  This is used to imply --all-progress whenever progress display
  is activated. Unlike --all-progress this flag doesn&#8217;t actually
  force any progress display by itself.
 </p>
 </dd>
 <dt class="hdlist1">
 -q
 </dt>
 <dd>
 <p>
  This flag makes the command not to report its progress
  on the standard error stream.
 </p>
 </dd>
 <dt class="hdlist1">
 --no-reuse-delta
 </dt>
 <dd>
 <p>
  When creating a packed archive in a repository that
  has existing packs, the command reuses existing deltas.
  This sometimes results in a slightly suboptimal pack.
  This flag tells the command not to reuse existing deltas
  but compute them from scratch.
 </p>
 </dd>
 <dt class="hdlist1">
 --no-reuse-object
 </dt>
 <dd>
 <p>
  This flag tells the command not to reuse existing object data at all,
  including non deltified object, forcing recompression of everything.
  This implies --no-reuse-delta. Useful only in the obscure case where
  wholesale enforcement of a different compression level on the
  packed data is desired.
 </p>
 </dd>
 <dt class="hdlist1">
 --compression=&lt;n&gt;
 </dt>
 <dd>
 <p>
  Specifies compression level for newly-compressed data in the
  generated pack. If not specified, pack compression level is
  determined first by pack.compression, then by core.compression,
  and defaults to -1, the zlib default, if neither is set.
  Add --no-reuse-object if you want to force a uniform compression
  level on all data no matter the source.
 </p>
 </dd>
 <dt class="hdlist1">
 --thin
 </dt>
 <dd>
 <p>
  Create a "thin" pack by omitting the common objects between a
  sender and a receiver in order to reduce network transfer. This
  option only makes sense in conjunction with --stdout.
 </p>
 <div class="paragraph"><p>Note: A thin pack violates the packed archive format by omitting
 required objects and is thus unusable by Git without making it
 self-contained. Use <code>git index-pack --fix-thin</code>
 (see <a href="git-index-pack.html">git-index-pack(1)</a>) to restore the self-contained property.</p></div>
 </dd>
 <dt class="hdlist1">
 --delta-base-offset
 </dt>
 <dd>
 <p>
  A packed archive can express the base object of a delta as
  either a 20-byte object name or as an offset in the
  stream, but ancient versions of Git don&#8217;t understand the
  latter. By default, <em>git pack-objects</em> only uses the
  former format for better compatibility. This option
  allows the command to use the latter format for
  compactness. Depending on the average delta chain
  length, this option typically shrinks the resulting
  packfile by 3-5 per-cent.
 </p>
 <div class="paragraph"><p>Note: Porcelain commands such as <code>git gc</code> (see <a href="git-gc.html">git-gc(1)</a>),
 <code>git repack</code> (see <a href="git-repack.html">git-repack(1)</a>) pass this option by default
 in modern Git when they put objects in your repository into pack files.
 So does <code>git bundle</code> (see <a href="git-bundle.html">git-bundle(1)</a>) when it creates a bundle.</p></div>
 </dd>
 <dt class="hdlist1">
 --threads=&lt;n&gt;
 </dt>
 <dd>
 <p>
  Specifies the number of threads to spawn when searching for best
  delta matches. This requires that pack-objects be compiled with
  pthreads otherwise this option is ignored with a warning.
  This is meant to reduce packing time on multiprocessor machines.
  The required amount of memory for the delta search window is
  however multiplied by the number of threads.
  Specifying 0 will cause Git to auto-detect the number of CPU&#8217;s
  and set the number of threads accordingly.
 </p>
 </dd>
 <dt class="hdlist1">
 --index-version=&lt;version&gt;[,&lt;offset&gt;]
 </dt>
 <dd>
 <p>
  This is intended to be used by the test suite only. It allows
  to force the version for the generated pack index, and to force
  64-bit index entries on objects located above the given offset.
 </p>
 </dd>
 <dt class="hdlist1">
 --keep-true-parents
 </dt>
 <dd>
 <p>
  With this option, parents that are hidden by grafts are packed
  nevertheless.
 </p>
 </dd>
 </dl></div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_see_also">SEE ALSO</h2>
 <div class="sectionbody">
 <div class="paragraph"><p><a href="git-rev-list.html">git-rev-list(1)</a>
 <a href="git-repack.html">git-repack(1)</a>
 <a href="git-prune-packed.html">git-prune-packed(1)</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>
 <div id="footnotes"><hr /></div>
 <div id="footer">
 <div id="footer-text">
 Last updated 2013-08-20 08:40:27 PDT
 </div>
 </div>
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