git-commit-graph(1)

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 <options> [--object-dir <dir>] [--[no-]progress]

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.

           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. (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
           significant performance gains for getting history of a directory or
           a file with git log -- <path>.

           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

       o   Write a commit-graph file containing all commits in the current
           commit-graph file along with those reachable from HEAD.

               $ git rev-parse HEAD | git commit-graph write --stdin-commits --append

GIT
       Part of the git(1) suite

Git 2.27.0                        06/01/2020               GIT-COMMIT-GRAPH(1)