| blob | 20c8551d6a2b3483cfea6669511192583c03e682 |
1 git-pack-objects(1)
2 ===================
4 NAME
5 ----
6 git-pack-objects - Create a packed archive of objects
9 SYNOPSIS
10 --------
11 [verse]
12 'git pack-objects' [-q | --progress | --all-progress] [--all-progress-implied]
13 [--no-reuse-delta] [--delta-base-offset] [--non-empty]
14 [--local] [--incremental] [--window=<n>] [--depth=<n>]
15 [--revs [--unpacked | --all]] [--stdout | base-name]
16 [--keep-true-parents] < object-list
19 DESCRIPTION
20 -----------
21 Reads list of objects from the standard input, and writes a packed
22 archive with specified base-name, or to the standard output.
24 A packed archive is an efficient way to transfer a set of objects
25 between two repositories as well as an access efficient archival
26 format. In a packed archive, an object is either stored as a
27 compressed whole or as a difference from some other object.
28 The latter is often called a delta.
30 The packed archive format (.pack) is designed to be self-contained
31 so that it can be unpacked without any further information. Therefore,
32 each object that a delta depends upon must be present within the pack.
34 A pack index file (.idx) is generated for fast, random access to the
35 objects in the pack. Placing both the index file (.idx) and the packed
36 archive (.pack) in the pack/ subdirectory of $GIT_OBJECT_DIRECTORY (or
37 any of the directories on $GIT_ALTERNATE_OBJECT_DIRECTORIES)
38 enables git to read from the pack archive.
40 The 'git unpack-objects' command can read the packed archive and
41 expand the objects contained in the pack into "one-file
42 one-object" format; this is typically done by the smart-pull
43 commands when a pack is created on-the-fly for efficient network
44 transport by their peers.
47 OPTIONS
48 -------
49 base-name::
50 Write into a pair of files (.pack and .idx), using
51 <base-name> to determine the name of the created file.
52 When this option is used, the two files are written in
53 <base-name>-<SHA1>.{pack,idx} files. <SHA1> is a hash
54 of the sorted object names to make the resulting filename
55 based on the pack content, and written to the standard
56 output of the command.
58 --stdout::
59 Write the pack contents (what would have been written to
60 .pack file) out to the standard output.
62 --revs::
63 Read the revision arguments from the standard input, instead of
64 individual object names. The revision arguments are processed
65 the same way as 'git rev-list' with the `--objects` flag
66 uses its `commit` arguments to build the list of objects it
67 outputs. The objects on the resulting list are packed.
69 --unpacked::
70 This implies `--revs`. When processing the list of
71 revision arguments read from the standard input, limit
72 the objects packed to those that are not already packed.
74 --all::
75 This implies `--revs`. In addition to the list of
76 revision arguments read from the standard input, pretend
77 as if all refs under `refs/` are specified to be
78 included.
80 --include-tag::
81 Include unasked-for annotated tags if the object they
82 reference was included in the resulting packfile. This
83 can be useful to send new tags to native git clients.
85 --window=<n>::
86 --depth=<n>::
87 These two options affect how the objects contained in
88 the pack are stored using delta compression. The
89 objects are first internally sorted by type, size and
90 optionally names and compared against the other objects
91 within --window to see if using delta compression saves
92 space. --depth limits the maximum delta depth; making
93 it too deep affects the performance on the unpacker
94 side, because delta data needs to be applied that many
95 times to get to the necessary object.
96 The default value for --window is 10 and --depth is 50.
98 --window-memory=<n>::
99 This option provides an additional limit on top of `--window`;
100 the window size will dynamically scale down so as to not take
101 up more than '<n>' bytes in memory. This is useful in
102 repositories with a mix of large and small objects to not run
103 out of memory with a large window, but still be able to take
104 advantage of the large window for the smaller objects. The
105 size can be suffixed with "k", "m", or "g".
106 `--window-memory=0` makes memory usage unlimited, which is the
107 default.
109 --max-pack-size=<n>::
110 Maximum size of each output pack file. The size can be suffixed with
111 "k", "m", or "g". The minimum size allowed is limited to 1 MiB.
112 If specified, multiple packfiles may be created.
113 The default is unlimited, unless the config variable
114 `pack.packSizeLimit` is set.
116 --honor-pack-keep::
117 This flag causes an object already in a local pack that
118 has a .keep file to be ignored, even if it would have
119 otherwise been packed.
121 --incremental::
122 This flag causes an object already in a pack to be ignored
123 even if it would have otherwise been packed.
125 --local::
126 This flag causes an object that is borrowed from an alternate
127 object store to be ignored even if it would have otherwise been
128 packed.
130 --non-empty::
131 Only create a packed archive if it would contain at
132 least one object.
134 --progress::
135 Progress status is reported on the standard error stream
136 by default when it is attached to a terminal, unless -q
137 is specified. This flag forces progress status even if
138 the standard error stream is not directed to a terminal.
140 --all-progress::
141 When --stdout is specified then progress report is
142 displayed during the object count and compression phases
143 but inhibited during the write-out phase. The reason is
144 that in some cases the output stream is directly linked
145 to another command which may wish to display progress
146 status of its own as it processes incoming pack data.
147 This flag is like --progress except that it forces progress
148 report for the write-out phase as well even if --stdout is
149 used.
151 --all-progress-implied::
152 This is used to imply --all-progress whenever progress display
153 is activated. Unlike --all-progress this flag doesn't actually
154 force any progress display by itself.
156 -q::
157 This flag makes the command not to report its progress
158 on the standard error stream.
160 --no-reuse-delta::
161 When creating a packed archive in a repository that
162 has existing packs, the command reuses existing deltas.
163 This sometimes results in a slightly suboptimal pack.
164 This flag tells the command not to reuse existing deltas
165 but compute them from scratch.
167 --no-reuse-object::
168 This flag tells the command not to reuse existing object data at all,
169 including non deltified object, forcing recompression of everything.
170 This implies --no-reuse-delta. Useful only in the obscure case where
171 wholesale enforcement of a different compression level on the
172 packed data is desired.
174 --compression=<n>::
175 Specifies compression level for newly-compressed data in the
176 generated pack. If not specified, pack compression level is
177 determined first by pack.compression, then by core.compression,
178 and defaults to -1, the zlib default, if neither is set.
179 Add --no-reuse-object if you want to force a uniform compression
180 level on all data no matter the source.
182 --thin::
183 Create a "thin" pack by omitting the common objects between a
184 sender and a receiver in order to reduce network transfer. This
185 option only makes sense in conjunction with --stdout.
186 +
187 Note: A thin pack violates the packed archive format by omitting
188 required objects and is thus unusable by git without making it
189 self-contained. Use `git index-pack --fix-thin`
190 (see linkgit:git-index-pack[1]) to restore the self-contained property.
192 --delta-base-offset::
193 A packed archive can express the base object of a delta as
194 either a 20-byte object name or as an offset in the
195 stream, but ancient versions of git don't understand the
196 latter. By default, 'git pack-objects' only uses the
197 former format for better compatibility. This option
198 allows the command to use the latter format for
199 compactness. Depending on the average delta chain
200 length, this option typically shrinks the resulting
201 packfile by 3-5 per-cent.
202 +
203 Note: Porcelain commands such as `git gc` (see linkgit:git-gc[1]),
204 `git repack` (see linkgit:git-repack[1]) pass this option by default
205 in modern git when they put objects in your repository into pack files.
206 So does `git bundle` (see linkgit:git-bundle[1]) when it creates a bundle.
208 --threads=<n>::
209 Specifies the number of threads to spawn when searching for best
210 delta matches. This requires that pack-objects be compiled with
211 pthreads otherwise this option is ignored with a warning.
212 This is meant to reduce packing time on multiprocessor machines.
213 The required amount of memory for the delta search window is
214 however multiplied by the number of threads.
215 Specifying 0 will cause git to auto-detect the number of CPU's
216 and set the number of threads accordingly.
218 --index-version=<version>[,<offset>]::
219 This is intended to be used by the test suite only. It allows
220 to force the version for the generated pack index, and to force
221 64-bit index entries on objects located above the given offset.
223 --keep-true-parents::
224 With this option, parents that are hidden by grafts are packed
225 nevertheless.
227 SEE ALSO
228 --------
229 linkgit:git-rev-list[1]
230 linkgit:git-repack[1]
231 linkgit:git-prune-packed[1]
233 GIT
234 ---
235 Part of the linkgit:git[1] suite