summaryrefslogtreecommitdiffstats
path: root/Documentation/git-commit-graph.txt
blob: 903b16830ea22529f476f9fadbe0c7aac4b31c12 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
git-commit-graph(1)
===================

NAME
----
git-commit-graph - Write and verify Git commit-graph files


SYNOPSIS
--------
[verse]
'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 significant performance gains
for getting history of a directory or a file with `git log -- <path>`. If
this option is given, future commit-graph writes will automatically assume
that this option was intended. Use `--no-changed-paths` to stop storing this
data.
+
With the `--max-new-filters=<n>` option, generate at most `n` new Bloom
filters (if `--changed-paths` is specified). If `n` is `-1`, no limit is
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:
+
* 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).
+
* 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
------------------------------------------------

CONFIGURATION
-------------

include::includes/cmd-config-section-all.txt[]

include::config/commitgraph.txt[]


FILE FORMAT
-----------

see linkgit:gitformat-commit-graph[5].

GIT
---
Part of the linkgit:git[1] suite