git gc 清理git垃圾

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https://git-scm.com/docs/git-gc

 

NAME

git-gc - Cleanup unnecessary files and optimize the local repository

SYNOPSIS

git gc [--aggressive] [--auto] [--quiet] [--prune=<date> | --no-prune] [--force] [--keep-largest-pack]

DESCRIPTION

Runs a number of housekeeping tasks within the current repository, such as compressing file revisions (to reduce disk space and increase performance), removing unreachable objects which may have been created from prior invocations of git add, packing refs, pruning reflog, rerere metadata or stale working trees. May also update ancillary indexes such as the commit-graph.

When common porcelain operations that create objects are run, they will check whether the repository has grown substantially since the last maintenance, and if so run git gc automatically. See gc.auto below for how to disable this behavior.

Running git gc manually should only be needed when adding objects to a repository without regularly running such porcelain commands, to do a one-off repository optimization, or e.g. to clean up a suboptimal mass-import. See the "PACKFILE OPTIMIZATION" section in git-fast-import[1] for more details on the import case.

OPTIONS

--aggressive

Usually git gc runs very quickly while providing good disk space utilization and performance. This option will cause git gc to more aggressively optimize the repository at the expense of taking much more time. The effects of this optimization are mostly persistent. See the "AGGRESSIVE" section below for details.

--auto

With this option, git gc checks whether any housekeeping is required; if not, it exits without performing any work.

See the gc.auto option in the "CONFIGURATION" section below for how this heuristic works.

Once housekeeping is triggered by exceeding the limits of configuration options such as gc.auto and gc.autoPackLimit, all other housekeeping tasks (e.g. rerere, working trees, reflog…?) will be performed as well.

--prune=<date>

Prune loose objects older than date (default is 2 weeks ago, overridable by the config variable gc.pruneExpire). --prune=now prunes loose objects regardless of their age and increases the risk of corruption if another process is writing to the repository concurrently; see "NOTES" below. --prune is on by default.

--no-prune

Do not prune any loose objects.

--quiet

Suppress all progress reports.

--force

Force git gc to run even if there may be another git gc instance running on this repository.

--keep-largest-pack

All packs except the largest pack and those marked with a .keep files are consolidated into a single pack. When this option is used, gc.bigPackThreshold is ignored.

 

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