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118 lines
4.3 KiB
Plaintext
118 lines
4.3 KiB
Plaintext
git-gc(1)
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=========
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NAME
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----
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git-gc - Cleanup unnecessary files and optimize the local repository
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SYNOPSIS
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--------
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'git-gc' [--prune] [--aggressive] [--auto]
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DESCRIPTION
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-----------
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Runs a number of housekeeping tasks within the current repository,
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such as compressing file revisions (to reduce disk space and increase
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performance) and removing unreachable objects which may have been
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created from prior invocations of linkgit:git-add[1].
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Users are encouraged to run this task on a regular basis within
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each repository to maintain good disk space utilization and good
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operating performance. Some git commands may automatically run
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`git-gc`; see the `--auto` flag below for details.
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OPTIONS
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-------
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--prune::
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Usually `git-gc` packs refs, expires old reflog entries,
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packs loose objects,
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and removes old 'rerere' records. Removal
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of unreferenced loose objects is an unsafe operation
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while other git operations are in progress, so it is not
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done by default. Pass this option if you want it, and only
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when you know nobody else is creating new objects in the
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repository at the same time (e.g. never use this option
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in a cron script).
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--aggressive::
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Usually 'git-gc' runs very quickly while providing good disk
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space utilization and performance. This option will cause
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git-gc to more aggressively optimize the repository at the expense
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of taking much more time. The effects of this optimization are
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persistent, so this option only needs to be used occasionally; every
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few hundred changesets or so.
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--auto::
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With this option, `git gc` checks whether any housekeeping is
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required; if not, it exits without performing any work.
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Some git commands run `git gc --auto` after performing
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operations that could create many loose objects.
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+
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Housekeeping is required if there are too many loose objects or
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too many packs in the repository. If the number of loose objects
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exceeds the value of the `gc.auto` configuration variable, then
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all loose objects are combined into a single pack using
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`git-repack -d -l`. Setting the value of `gc.auto` to 0
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disables automatic packing of loose objects.
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+
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If the number of packs exceeds the value of `gc.autopacklimit`,
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then existing packs (except those marked with a `.keep` file)
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are consolidated into a single pack by using the `-A` option of
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`git-repack`. Setting `gc.autopacklimit` to 0 disables
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automatic consolidation of packs.
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Configuration
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-------------
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The optional configuration variable 'gc.reflogExpire' can be
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set to indicate how long historical entries within each branch's
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reflog should remain available in this repository. The setting is
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expressed as a length of time, for example '90 days' or '3 months'.
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It defaults to '90 days'.
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The optional configuration variable 'gc.reflogExpireUnreachable'
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can be set to indicate how long historical reflog entries which
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are not part of the current branch should remain available in
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this repository. These types of entries are generally created as
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a result of using `git commit \--amend` or `git rebase` and are the
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commits prior to the amend or rebase occurring. Since these changes
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are not part of the current project most users will want to expire
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them sooner. This option defaults to '30 days'.
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The optional configuration variable 'gc.rerereresolved' indicates
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how long records of conflicted merge you resolved earlier are
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kept. This defaults to 60 days.
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The optional configuration variable 'gc.rerereunresolved' indicates
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how long records of conflicted merge you have not resolved are
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kept. This defaults to 15 days.
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The optional configuration variable 'gc.packrefs' determines if
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`git gc` runs `git-pack-refs`. Without the configuration, `git-pack-refs`
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is not run in bare repositories by default, to allow older dumb-transport
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clients fetch from the repository, but this will change in the future.
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The optional configuration variable 'gc.aggressiveWindow' controls how
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much time is spent optimizing the delta compression of the objects in
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the repository when the --aggressive option is specified. The larger
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the value, the more time is spent optimizing the delta compression. See
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the documentation for the --window' option in linkgit:git-repack[1] for
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more details. This defaults to 10.
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See Also
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--------
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linkgit:git-prune[1]
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linkgit:git-reflog[1]
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linkgit:git-repack[1]
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linkgit:git-rerere[1]
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Author
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------
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Written by Shawn O. Pearce <spearce@spearce.org>
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GIT
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---
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Part of the linkgit:git[7] suite
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