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git-repack - Pack unpacked objects in a repository


git repack [-a] [-A] [-d] [-f] [-F] [-l] [-n] [-q] [-b] [--window=<n>] [--depth=<n>]


This command is used to combine all objects that do not currently reside in a "pack", into
a pack. It can also be used to re-organize existing packs into a single, more efficient

A pack is a collection of objects, individually compressed, with delta compression
applied, stored in a single file, with an associated index file.

Packs are used to reduce the load on mirror systems, backup engines, disk storage, etc.


Instead of incrementally packing the unpacked objects, pack everything referenced into
a single pack. Especially useful when packing a repository that is used for private
development. Use with -d. This will clean up the objects that git prune leaves behind,
but git fsck --full --dangling shows as dangling.

Note that users fetching over dumb protocols will have to fetch the whole new pack in
order to get any contained object, no matter how many other objects in that pack they
already have locally.

Same as -a, unless -d is used. Then any unreachable objects in a previous pack become
loose, unpacked objects, instead of being left in the old pack. Unreachable objects
are never intentionally added to a pack, even when repacking. This option prevents
unreachable objects from being immediately deleted by way of being left in the old
pack and then removed. Instead, the loose unreachable objects will be pruned according
to normal expiry rules with the next git gc invocation. See git-gc(1).

After packing, if the newly created packs make some existing packs redundant, remove
the redundant packs. Also run git prune-packed to remove redundant loose object files.

Pass the --local option to git pack-objects. See git-pack-objects(1).

Pass the --no-reuse-delta option to git-pack-objects, see git-pack-objects(1).

Pass the --no-reuse-object option to git-pack-objects, see git-pack-objects(1).

Pass the -q option to git pack-objects. See git-pack-objects(1).

Do not update the server information with git update-server-info. This option skips
updating local catalog files needed to publish this repository (or a direct copy of
it) over HTTP or FTP. See git-update-server-info(1).

--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.

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.

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 pack.packSizeLimit is

-b, --write-bitmap-index
Write a reachability bitmap index as part of the repack. This only makes sense when
used with -a or -A, as the bitmaps must be able to refer to all reachable objects.
This option overrides the setting of pack.writeBitmaps.

Include objects in .keep files when repacking. Note that we still do not delete .keep
packs after pack-objects finishes. This means that we may duplicate objects, but this
makes the option safe to use when there are concurrent pushes or fetches. This option
is generally only useful if you are writing bitmaps with -b or pack.writeBitmaps, as
it ensures that the bitmapped packfile has the necessary objects.


By default, the command passes --delta-base-offset option to git pack-objects; this
typically results in slightly smaller packs, but the generated packs are incompatible with
versions of Git older than version 1.4.4. If you need to share your repository with such
ancient Git versions, either directly or via the dumb http or rsync protocol, then you
need to set the configuration variable repack.UseDeltaBaseOffset to "false" and repack.
Access from old Git versions over the native protocol is unaffected by this option as the
conversion is performed on the fly as needed in that case.

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