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download PDF document: git-commit-graph.1.pdf

GIT-COMMIT-GRAPH(1) Git Manual GIT-COMMIT-GRAPH(1)
NAME git-commit-graph - Write and verify Git commit-graph files
SYNOPSIS git commit-graph verify [--object-dir <dir>] [--shallow] [--[no-]progress] git commit-graph write [--object-dir <dir>] [--append] [--split[=<strategy>]] [--reachable | --stdin-packs | --stdin-commits] [--changed-paths] [--[no-]max-new-filters <n>] [--[no-]progress] <split options>

DESCRIPTION Manage the serialized commit-graph file.
OPTIONS --object-dir Use given directory for the location of packfiles and commit-graph file. This parameter exists to specify the location of an alternate that only has the objects directory, not a full .git directory. The commit-graph file is expected to be in the <dir>/info directory and the packfiles are expected to be in <dir>/pack. If the directory could not be made into an absolute path, or does not match any known object directory, git commit-graph ... will exit with non-zero status.
--[no-]progress Turn progress on/off explicitly. If neither is specified, progress is shown if standard error is connected to a terminal.
COMMANDS write Write a commit-graph file based on the commits found in packfiles. If the config option core.commitGraph is disabled, then this command will output a warning, then return success without writing a commit-graph file.
With the --stdin-packs option, generate the new commit graph by walking objects only in the specified pack-indexes. (Cannot be combined with --stdin-commits or --reachable.)
With the --stdin-commits option, generate the new commit graph by walking commits starting at the commits specified in stdin as a list of OIDs in hex, one OID per line. OIDs that resolve to non-commits (either directly, or by peeling tags) are silently ignored. OIDs that are malformed, or do not exist generate an error. (Cannot be combined with --stdin-packs or --reachable.)
With the --reachable option, generate the new commit graph by walking commits starting at all refs. (Cannot be combined with --stdin-commits or --stdin-packs.)
With the --append option, include all commits that are present in the existing commit-graph file.
With the --changed-paths option, compute and write information about the paths changed between a commit and its first parent. This operation can take a while on large repositories. It provides enforced. Only commits present in the new layer count against this limit. To retroactively compute Bloom filters over earlier layers, it is advised to use --split=replace. Overrides the commitGraph.maxNewFilters configuration.
With the --split[=<strategy>] option, write the commit-graph as a chain of multiple commit-graph files stored in <dir>/info/commit-graphs. Commit-graph layers are merged based on the strategy and other splitting options. The new commits not already in the commit-graph are added in a new "tip" file. This file is merged with the existing file if the following merge conditions are met:
o If --split=no-merge is specified, a merge is never performed, and the remaining options are ignored. --split=replace overwrites the existing chain with a new one. A bare --split defers to the remaining options. (Note that merging a chain of commit graphs replaces the existing chain with a length-1 chain where the first and only incremental holds the entire graph).
o If --size-multiple=<X> is not specified, let X equal 2. If the new tip file would have N commits and the previous tip has M commits and X times N is greater than M, instead merge the two files into a single file.
o If --max-commits=<M> is specified with M a positive integer, and the new tip file would have more than M commits, then instead merge the new tip with the previous tip.
Finally, if --expire-time=<datetime> is not specified, let datetime be the current time. After writing the split commit-graph, delete all unused commit-graph whose modified times are older than datetime.
verify Read the commit-graph file and verify its contents against the object database. Used to check for corrupted data.
With the --shallow option, only check the tip commit-graph file in a chain of split commit-graphs.
EXAMPLES o Write a commit-graph file for the packed commits in your local .git directory.
$ git commit-graph write

o Write a commit-graph file, extending the current commit-graph file using commits in <pack-index>.
$ echo <pack-index> | git commit-graph write --stdin-packs

o Write a commit-graph file containing all reachable commits.
$ git show-ref -s | git commit-graph write --stdin-commits

Everything below this line in this section is selectively included from the git-config(1) documentation. The content is the same as what's found there:
commitGraph.generationVersion Specifies the type of generation number version to use when writing or reading the commit-graph file. If version 1 is specified, then the corrected commit dates will not be written or read. Defaults to 2.
commitGraph.maxNewFilters Specifies the default value for the --max-new-filters option of git commit-graph write (c.f., git-commit-graph(1)).
commitGraph.readChangedPaths If true, then git will use the changed-path Bloom filters in the commit-graph file (if it exists, and they are present). Defaults to true. See git-commit-graph(1) for more information.
FILE FORMAT see gitformat-commit-graph(5).
GIT Part of the git(1) suite
Git 2.42.0 2023-08-21 GIT-COMMIT-GRAPH(1)