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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.

       --[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 --split option, write the commit-graph as a chain of multiple commit-graph
           files stored in <dir>/info/commit-graphs. 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:

           •   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.

           •   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

       •   Write a commit-graph file for the packed commits in your local .git directory.

               $ git commit-graph write

       •   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

       •   Write a commit-graph file containing all reachable commits.

               $ git show-ref -s | git commit-graph write --stdin-commits

       •   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