mirror of
https://github.com/git/git
synced 2024-08-24 18:26:02 +00:00
![Junio C Hamano](/assets/img/avatar_default.png)
* maint: git-svn: don't attempt to spawn pager if we don't want one Supplant the "while case ... break ;; esac" idiom User Manual: add a chapter for submodules user-manual: don't assume refs are stored under .git/refs Detect exec bit in more cases. Conjugate "search" correctly in the git-prune-packed man page. Move the paragraph specifying where the .idx and .pack files should be Documentation/git-lost-found.txt: drop unnecessarily duplicated name.
203 lines
7.2 KiB
Plaintext
203 lines
7.2 KiB
Plaintext
git-pack-objects(1)
|
|
===================
|
|
|
|
NAME
|
|
----
|
|
git-pack-objects - Create a packed archive of objects
|
|
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'git-pack-objects' [-q] [--no-reuse-delta] [--delta-base-offset] [--non-empty]
|
|
[--local] [--incremental] [--window=N] [--depth=N] [--all-progress]
|
|
[--revs [--unpacked | --all]*] [--stdout | base-name] < object-list
|
|
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
Reads list of objects from the standard input, and writes a packed
|
|
archive with specified base-name, or to the standard output.
|
|
|
|
A packed archive is an efficient way to transfer set of objects
|
|
between two repositories, and also is an archival format which
|
|
is efficient to access. The packed archive format (.pack) is
|
|
designed to be unpackable without having anything else, but for
|
|
random access, accompanied with the pack index file (.idx).
|
|
|
|
Placing both in the pack/ subdirectory of $GIT_OBJECT_DIRECTORY (or
|
|
any of the directories on $GIT_ALTERNATE_OBJECT_DIRECTORIES)
|
|
enables git to read from such an archive.
|
|
|
|
'git-unpack-objects' command can read the packed archive and
|
|
expand the objects contained in the pack into "one-file
|
|
one-object" format; this is typically done by the smart-pull
|
|
commands when a pack is created on-the-fly for efficient network
|
|
transport by their peers.
|
|
|
|
In a packed archive, an object is either stored as a compressed
|
|
whole, or as a difference from some other object. The latter is
|
|
often called a delta.
|
|
|
|
|
|
OPTIONS
|
|
-------
|
|
base-name::
|
|
Write into a pair of files (.pack and .idx), using
|
|
<base-name> to determine the name of the created file.
|
|
When this option is used, the two files are written in
|
|
<base-name>-<SHA1>.{pack,idx} files. <SHA1> is a hash
|
|
of the sorted object names to make the resulting filename
|
|
based on the pack content, and written to the standard
|
|
output of the command.
|
|
|
|
--stdout::
|
|
Write the pack contents (what would have been written to
|
|
.pack file) out to the standard output.
|
|
|
|
--revs::
|
|
Read the revision arguments from the standard input, instead of
|
|
individual object names. The revision arguments are processed
|
|
the same way as gitlink:git-rev-list[1] with `--objects` flag
|
|
uses its `commit` arguments to build the list of objects it
|
|
outputs. The objects on the resulting list are packed.
|
|
|
|
--unpacked::
|
|
This implies `--revs`. When processing the list of
|
|
revision arguments read from the standard input, limit
|
|
the objects packed to those that are not already packed.
|
|
|
|
--all::
|
|
This implies `--revs`. In addition to the list of
|
|
revision arguments read from the standard input, pretend
|
|
as if all refs under `$GIT_DIR/refs` are specified to be
|
|
included.
|
|
|
|
--window=[N], --depth=[N]::
|
|
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.
|
|
|
|
--window-memory=[N]::
|
|
This option provides an additional limit on top of `--window`;
|
|
the window size will dynamically scale down so as to not take
|
|
up more than N 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".
|
|
`--window-memory=0` makes memory usage unlimited, which is the
|
|
default.
|
|
|
|
--max-pack-size=<n>::
|
|
Maximum size of each output packfile, expressed in MiB.
|
|
If specified, multiple packfiles may be created.
|
|
The default is unlimited.
|
|
|
|
--incremental::
|
|
This flag causes an object already in a pack ignored
|
|
even if it appears in the standard input.
|
|
|
|
--local::
|
|
This flag is similar to `--incremental`; instead of
|
|
ignoring all packed objects, it only ignores objects
|
|
that are packed and not in the local object store
|
|
(i.e. borrowed from an alternate).
|
|
|
|
--non-empty::
|
|
Only create a packed archive if it would contain at
|
|
least one object.
|
|
|
|
--progress::
|
|
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.
|
|
|
|
--all-progress::
|
|
When --stdout is specified then progress report is
|
|
displayed during the object count and deltification 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.
|
|
|
|
-q::
|
|
This flag makes the command not to report its progress
|
|
on the standard error stream.
|
|
|
|
--no-reuse-delta::
|
|
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.
|
|
|
|
--no-reuse-object::
|
|
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.
|
|
|
|
--compression=[N]::
|
|
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.
|
|
|
|
--delta-base-offset::
|
|
A packed archive can express base object of a delta as
|
|
either 20-byte object name or as an offset in the
|
|
stream, but older version of git does not understand the
|
|
latter. By default, git-pack-objects 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.
|
|
|
|
--threads=<n>::
|
|
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.
|
|
|
|
--index-version=<version>[,<offset>]::
|
|
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.
|
|
|
|
|
|
Author
|
|
------
|
|
Written by Linus Torvalds <torvalds@osdl.org>
|
|
|
|
Documentation
|
|
-------------
|
|
Documentation by Junio C Hamano
|
|
|
|
See Also
|
|
--------
|
|
gitlink:git-rev-list[1]
|
|
gitlink:git-repack[1]
|
|
gitlink:git-prune-packed[1]
|
|
|
|
GIT
|
|
---
|
|
Part of the gitlink:git[7] suite
|