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-rw-r--r-- | Documentation/git-pack-refs.txt | 96 |
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diff --git a/Documentation/git-pack-refs.txt b/Documentation/git-pack-refs.txt new file mode 100644 index 0000000..284956a --- /dev/null +++ b/Documentation/git-pack-refs.txt @@ -0,0 +1,96 @@ +git-pack-refs(1) +================ + +NAME +---- +git-pack-refs - Pack heads and tags for efficient repository access + +SYNOPSIS +-------- +[verse] +'git pack-refs' [--all] [--no-prune] [--include <pattern>] [--exclude <pattern>] + +DESCRIPTION +----------- + +Traditionally, tips of branches and tags (collectively known as +'refs') were stored one file per ref in a (sub)directory +under `$GIT_DIR/refs` +directory. While many branch tips tend to be updated often, +most tags and some branch tips are never updated. When a +repository has hundreds or thousands of tags, this +one-file-per-ref format both wastes storage and hurts +performance. + +This command is used to solve the storage and performance +problem by storing the refs in a single file, +`$GIT_DIR/packed-refs`. When a ref is missing from the +traditional `$GIT_DIR/refs` directory hierarchy, it is looked +up in this +file and used if found. + +Subsequent updates to branches always create new files under +`$GIT_DIR/refs` directory hierarchy. + +A recommended practice to deal with a repository with too many +refs is to pack its refs with `--all` once, and +occasionally run `git pack-refs`. Tags are by +definition stationary and are not expected to change. Branch +heads will be packed with the initial `pack-refs --all`, but +only the currently active branch heads will become unpacked, +and the next `pack-refs` (without `--all`) will leave them +unpacked. + + +OPTIONS +------- + +--all:: + +The command by default packs all tags and refs that are already +packed, and leaves other refs +alone. This is because branches are expected to be actively +developed and packing their tips does not help performance. +This option causes all refs to be packed as well, with the exception +of hidden refs, broken refs, and symbolic refs. Useful for a repository +with many branches of historical interests. + +--no-prune:: + +The command usually removes loose refs under `$GIT_DIR/refs` +hierarchy after packing them. This option tells it not to. + +--include <pattern>:: + +Pack refs based on a `glob(7)` pattern. Repetitions of this option +accumulate inclusion patterns. If a ref is both included in `--include` and +`--exclude`, `--exclude` takes precedence. Using `--include` will preclude all +tags from being included by default. Symbolic refs and broken refs will never +be packed. When used with `--all`, it will be a noop. Use `--no-include` to clear +and reset the list of patterns. + +--exclude <pattern>:: + +Do not pack refs matching the given `glob(7)` pattern. Repetitions of this option +accumulate exclusion patterns. Use `--no-exclude` to clear and reset the list of +patterns. If a ref is already packed, including it with `--exclude` will not +unpack it. + +When used with `--all`, pack only loose refs which do not match any of +the provided `--exclude` patterns. + +When used with `--include`, refs provided to `--include`, minus refs that are +provided to `--exclude` will be packed. + + +BUGS +---- + +Older documentation written before the packed-refs mechanism was +introduced may still say things like ".git/refs/heads/<branch> file +exists" when it means "branch <branch> exists". + + +GIT +--- +Part of the linkgit:git[1] suite |