1GIT-REPACK(1)                     Git Manual                     GIT-REPACK(1)
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NAME

6       git-repack - Pack unpacked objects in a repository
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SYNOPSIS

9       git repack [-a] [-A] [-d] [-f] [-F] [-l] [-n] [-q] [-b] [--window=<n>] [--depth=<n>] [--threads=<n>] [--keep-pack=<pack-name>]
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DESCRIPTION

12       This command is used to combine all objects that do not currently
13       reside in a "pack", into a pack. It can also be used to re-organize
14       existing packs into a single, more efficient pack.
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16       A pack is a collection of objects, individually compressed, with delta
17       compression applied, stored in a single file, with an associated index
18       file.
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20       Packs are used to reduce the load on mirror systems, backup engines,
21       disk storage, etc.
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OPTIONS

24       -a
25           Instead of incrementally packing the unpacked objects, pack
26           everything referenced into a single pack. Especially useful when
27           packing a repository that is used for private development. Use with
28           -d. This will clean up the objects that git prune leaves behind,
29           but git fsck --full --dangling shows as dangling.
30
31           Note that users fetching over dumb protocols will have to fetch the
32           whole new pack in order to get any contained object, no matter how
33           many other objects in that pack they already have locally.
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35           Promisor packfiles are repacked separately: if there are packfiles
36           that have an associated ".promisor" file, these packfiles will be
37           repacked into another separate pack, and an empty ".promisor" file
38           corresponding to the new separate pack will be written.
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40       -A
41           Same as -a, unless -d is used. Then any unreachable objects in a
42           previous pack become loose, unpacked objects, instead of being left
43           in the old pack. Unreachable objects are never intentionally added
44           to a pack, even when repacking. This option prevents unreachable
45           objects from being immediately deleted by way of being left in the
46           old pack and then removed. Instead, the loose unreachable objects
47           will be pruned according to normal expiry rules with the next git
48           gc invocation. See git-gc(1).
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50       -d
51           After packing, if the newly created packs make some existing packs
52           redundant, remove the redundant packs. Also run git prune-packed to
53           remove redundant loose object files.
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55       -l
56           Pass the --local option to git pack-objects. See git-pack-
57           objects(1).
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59       -f
60           Pass the --no-reuse-delta option to git-pack-objects, see git-pack-
61           objects(1).
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63       -F
64           Pass the --no-reuse-object option to git-pack-objects, see git-
65           pack-objects(1).
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67       -q
68           Pass the -q option to git pack-objects. See git-pack-objects(1).
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70       -n
71           Do not update the server information with git update-server-info.
72           This option skips updating local catalog files needed to publish
73           this repository (or a direct copy of it) over HTTP or FTP. See git-
74           update-server-info(1).
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76       --window=<n>, --depth=<n>
77           These two options affect how the objects contained in the pack are
78           stored using delta compression. The objects are first internally
79           sorted by type, size and optionally names and compared against the
80           other objects within --window to see if using delta compression
81           saves space.  --depth limits the maximum delta depth; making it too
82           deep affects the performance on the unpacker side, because delta
83           data needs to be applied that many times to get to the necessary
84           object.
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86           The default value for --window is 10 and --depth is 50. The maximum
87           depth is 4095.
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89       --threads=<n>
90           This option is passed through to git pack-objects.
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92       --window-memory=<n>
93           This option provides an additional limit on top of --window; the
94           window size will dynamically scale down so as to not take up more
95           than <n> bytes in memory. This is useful in repositories with a mix
96           of large and small objects to not run out of memory with a large
97           window, but still be able to take advantage of the large window for
98           the smaller objects. The size can be suffixed with "k", "m", or
99           "g".  --window-memory=0 makes memory usage unlimited. The default
100           is taken from the pack.windowMemory configuration variable. Note
101           that the actual memory usage will be the limit multiplied by the
102           number of threads used by git-pack-objects(1).
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104       --max-pack-size=<n>
105           Maximum size of each output pack file. The size can be suffixed
106           with "k", "m", or "g". The minimum size allowed is limited to 1
107           MiB. If specified, multiple packfiles may be created, which also
108           prevents the creation of a bitmap index. The default is unlimited,
109           unless the config variable pack.packSizeLimit is set.
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111       -b, --write-bitmap-index
112           Write a reachability bitmap index as part of the repack. This only
113           makes sense when used with -a or -A, as the bitmaps must be able to
114           refer to all reachable objects. This option overrides the setting
115           of repack.writeBitmaps. This option has no effect if multiple
116           packfiles are created.
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118       --pack-kept-objects
119           Include objects in .keep files when repacking. Note that we still
120           do not delete .keep packs after pack-objects finishes. This means
121           that we may duplicate objects, but this makes the option safe to
122           use when there are concurrent pushes or fetches. This option is
123           generally only useful if you are writing bitmaps with -b or
124           repack.writeBitmaps, as it ensures that the bitmapped packfile has
125           the necessary objects.
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127       --keep-pack=<pack-name>
128           Exclude the given pack from repacking. This is the equivalent of
129           having .keep file on the pack.  <pack-name> is the pack file name
130           without leading directory (e.g.  pack-123.pack). The option could
131           be specified multiple times to keep multiple packs.
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133       --unpack-unreachable=<when>
134           When loosening unreachable objects, do not bother loosening any
135           objects older than <when>. This can be used to optimize out the
136           write of any objects that would be immediately pruned by a
137           follow-up git prune.
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139       -k, --keep-unreachable
140           When used with -ad, any unreachable objects from existing packs
141           will be appended to the end of the packfile instead of being
142           removed. In addition, any unreachable loose objects will be packed
143           (and their loose counterparts removed).
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145       -i, --delta-islands
146           Pass the --delta-islands option to git-pack-objects, see git-pack-
147           objects(1).
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CONFIGURATION

150       Various configuration variables affect packing, see git-config(1)
151       (search for "pack" and "delta").
152
153       By default, the command passes --delta-base-offset option to git
154       pack-objects; this typically results in slightly smaller packs, but the
155       generated packs are incompatible with versions of Git older than
156       version 1.4.4. If you need to share your repository with such ancient
157       Git versions, either directly or via the dumb http protocol, then you
158       need to set the configuration variable repack.UseDeltaBaseOffset to
159       "false" and repack. Access from old Git versions over the native
160       protocol is unaffected by this option as the conversion is performed on
161       the fly as needed in that case.
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163       Delta compression is not used on objects larger than the
164       core.bigFileThreshold configuration variable and on files with the
165       attribute delta set to false.
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SEE ALSO

168       git-pack-objects(1) git-prune-packed(1)
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GIT

171       Part of the git(1) suite
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175Git 2.31.1                        2021-03-26                     GIT-REPACK(1)
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