Documentation/git-commit-graph.txt

   1 git-commit-graph(1)
   2 ===================
   3
   4 NAME
   5 ----
   6 git-commit-graph - Write and verify Git commit-graph files
   7
   8
   9 SYNOPSIS
  10 --------
  11 [verse]
  12 'git commit-graph read' [--object-dir <dir>]
  13 'git commit-graph verify' [--object-dir <dir>] [--shallow] [--[no-]progress]
  14 'git commit-graph write' <options> [--object-dir <dir>] [--[no-]progress]
  15
  16
  17 DESCRIPTION
  18 -----------
  19
  20 Manage the serialized commit-graph file.
  21
  22
  23 OPTIONS
  24 -------
  25 --object-dir::
  26         Use given directory for the location of packfiles and commit-graph
  27         file. This parameter exists to specify the location of an alternate
  28         that only has the objects directory, not a full `.git` directory. The
  29         commit-graph file is expected to be in the `<dir>/info` directory and
  30         the packfiles are expected to be in `<dir>/pack`.
  31
  32 --[no-]progress::
  33         Turn progress on/off explicitly. If neither is specified, progress is
  34         shown if standard error is connected to a terminal.
  35
  36 COMMANDS
  37 --------
  38 'write'::
  39
  40 Write a commit-graph file based on the commits found in packfiles.
  41 +
  42 With the `--stdin-packs` option, generate the new commit graph by
  43 walking objects only in the specified pack-indexes. (Cannot be combined
  44 with `--stdin-commits` or `--reachable`.)
  45 +
  46 With the `--stdin-commits` option, generate the new commit graph by
  47 walking commits starting at the commits specified in stdin as a list
  48 of OIDs in hex, one OID per line. (Cannot be combined with
  49 `--stdin-packs` or `--reachable`.)
  50 +
  51 With the `--reachable` option, generate the new commit graph by walking
  52 commits starting at all refs. (Cannot be combined with `--stdin-commits`
  53 or `--stdin-packs`.)
  54 +
  55 With the `--append` option, include all commits that are present in the
  56 existing commit-graph file.
  57 +
  58 With the `--split` option, write the commit-graph as a chain of multiple
  59 commit-graph files stored in `<dir>/info/commit-graphs`. The new commits
  60 not already in the commit-graph are added in a new "tip" file. This file
  61 is merged with the existing file if the following merge conditions are
  62 met:
  63 +
  64 * If `--size-multiple=<X>` is not specified, let `X` equal 2. If the new
  65 tip file would have `N` commits and the previous tip has `M` commits and
  66 `X` times `N` is greater than  `M`, instead merge the two files into a
  67 single file.
  68 +
  69 * If `--max-commits=<M>` is specified with `M` a positive integer, and the
  70 new tip file would have more than `M` commits, then instead merge the new
  71 tip with the previous tip.
  72 +
  73 Finally, if `--expire-time=<datetime>` is not specified, let `datetime`
  74 be the current time. After writing the split commit-graph, delete all
  75 unused commit-graph whose modified times are older than `datetime`.
  76
  77 'read'::
  78
  79 Read the commit-graph file and output basic details about it.
  80 Used for debugging purposes.
  81
  82 'verify'::
  83
  84 Read the commit-graph file and verify its contents against the object
  85 database. Used to check for corrupted data.
  86 +
  87 With the `--shallow` option, only check the tip commit-graph file in
  88 a chain of split commit-graphs.
  89
  90
  91 EXAMPLES
  92 --------
  93
  94 * Write a commit-graph file for the packed commits in your local `.git`
  95   directory.
  96 +
  97 ------------------------------------------------
  98 $ git commit-graph write
  99 ------------------------------------------------
 100
 101 * Write a commit-graph file, extending the current commit-graph file
 102   using commits in `<pack-index>`.
 103 +
 104 ------------------------------------------------
 105 $ echo <pack-index> | git commit-graph write --stdin-packs
 106 ------------------------------------------------
 107
 108 * Write a commit-graph file containing all reachable commits.
 109 +
 110 ------------------------------------------------
 111 $ git show-ref -s | git commit-graph write --stdin-commits
 112 ------------------------------------------------
 113
 114 * Write a commit-graph file containing all commits in the current
 115   commit-graph file along with those reachable from `HEAD`.
 116 +
 117 ------------------------------------------------
 118 $ git rev-parse HEAD | git commit-graph write --stdin-commits --append
 119 ------------------------------------------------
 120
 121 * Read basic information from the commit-graph file.
 122 +
 123 ------------------------------------------------
 124 $ git commit-graph read
 125 ------------------------------------------------
 126
 127
 128 GIT
 129 ---
 130 Part of the linkgit:git[1] suite