oasis-root

git-commit-graph.1 (9820B)

'\" t
.\"     Title: git-commit-graph
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets v1.79.2 <http://docbook.sf.net/>
.\"      Date: 2025-03-14
.\"    Manual: Git Manual
.\"    Source: Git 2.49.0
.\"  Language: English
.\"
.TH "GIT\-COMMIT\-GRAPH" "1" "2025-03-14" "Git 2\&.49\&.0" "Git Manual"
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.SH "NAME"
git-commit-graph \- Write and verify Git commit\-graph files
.SH "SYNOPSIS"
.sp
.nf
\fIgit commit\-graph verify\fR [\-\-object\-dir <dir>] [\-\-shallow] [\-\-[no\-]progress]
\fIgit commit\-graph write\fR [\-\-object\-dir <dir>] [\-\-append]
                        [\-\-split[=<strategy>]] [\-\-reachable | \-\-stdin\-packs | \-\-stdin\-commits]
                        [\-\-changed\-paths] [\-\-[no\-]max\-new\-filters <n>] [\-\-[no\-]progress]
                        <split\-options>
.fi
.SH "DESCRIPTION"
.sp
Manage the serialized commit\-graph file\&.
.SH "OPTIONS"
.PP
\-\-object\-dir
.RS 4
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 \&.\fBgit\fR
directory\&. The commit\-graph file is expected to be in the
\fI<dir>\fR\fB/info\fR
directory and the packfiles are expected to be in
\fI<dir>\fR\fB/pack\fR\&. If the directory could not be made into an absolute path, or does not match any known object directory,
\fBgit\fR
\fBcommit\-graph\fR
\&.\&.\&. will exit with non\-zero status\&.
.RE
.PP
\-\-[no\-]progress
.RS 4
Turn progress on/off explicitly\&. If neither is specified, progress is shown if standard error is connected to a terminal\&.
.RE
.SH "COMMANDS"
.PP
\fIwrite\fR
.RS 4
Write a commit\-graph file based on the commits found in packfiles\&. If the config option
\fBcore\&.commitGraph\fR
is disabled, then this command will output a warning, then return success without writing a commit\-graph file\&.
.sp
With the
\fB\-\-stdin\-packs\fR
option, generate the new commit graph by walking objects only in the specified pack\-indexes\&. (Cannot be combined with
\fB\-\-stdin\-commits\fR
or
\fB\-\-reachable\fR\&.)
.sp
With the
\fB\-\-stdin\-commits\fR
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
\fB\-\-stdin\-packs\fR
or
\fB\-\-reachable\fR\&.)
.sp
With the
\fB\-\-reachable\fR
option, generate the new commit graph by walking commits starting at all refs\&. (Cannot be combined with
\fB\-\-stdin\-commits\fR
or
\fB\-\-stdin\-packs\fR\&.)
.sp
With the
\fB\-\-append\fR
option, include all commits that are present in the existing commit\-graph file\&.
.sp
With the
\fB\-\-changed\-paths\fR
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
\fBgit\fR
\fBlog\fR
\fB\-\-\fR
\fI<path>\fR\&. If this option is given, future commit\-graph writes will automatically assume that this option was intended\&. Use
\fB\-\-no\-changed\-paths\fR
to stop storing this data\&.
.sp
With the
\fB\-\-max\-new\-filters=\fR\fI<n>\fR
option, generate at most
\fBn\fR
new Bloom filters (if
\fB\-\-changed\-paths\fR
is specified)\&. If
\fBn\fR
is
\fB\-1\fR, 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
\fB\-\-split=replace\fR\&. Overrides the
\fBcommitGraph\&.maxNewFilters\fR
configuration\&.
.sp
With the
\fB\-\-split\fR[\fB=\fR\fI<strategy>\fR] option, write the commit\-graph as a chain of multiple commit\-graph files stored in
\fI<dir>\fR\fB/info/commit\-graphs\fR\&. 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:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
If
\fB\-\-split=no\-merge\fR
is specified, a merge is never performed, and the remaining options are ignored\&.
\fB\-\-split=replace\fR
overwrites the existing chain with a new one\&. A bare
\fB\-\-split\fR
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)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
If
\fB\-\-size\-multiple=\fR\fI<X>\fR
is not specified, let
\fBX\fR
equal 2\&. If the new tip file would have
\fBN\fR
commits and the previous tip has
\fBM\fR
commits and
\fBX\fR
times
\fBN\fR
is greater than
\fBM\fR, instead merge the two files into a single file\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
If
\fB\-\-max\-commits=\fR\fI<M>\fR
is specified with
\fBM\fR
a positive integer, and the new tip file would have more than
\fBM\fR
commits, then instead merge the new tip with the previous tip\&.
.sp
Finally, if
\fB\-\-expire\-time=\fR\fI<datetime>\fR
is not specified, let
\fBdatetime\fR
be the current time\&. After writing the split commit\-graph, delete all unused commit\-graph whose modified times are older than
\fBdatetime\fR\&.
.RE
.RE
.PP
\fIverify\fR
.RS 4
Read the commit\-graph file and verify its contents against the object database\&. Used to check for corrupted data\&.
.sp
With the
\fB\-\-shallow\fR
option, only check the tip commit\-graph file in a chain of split commit\-graphs\&.
.RE
.SH "EXAMPLES"
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Write a commit\-graph file for the packed commits in your local \&.\fBgit\fR
directory\&.
.sp
.if n \{\
.RS 4
.\}
.nf
$ git commit\-graph write
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Write a commit\-graph file, extending the current commit\-graph file using commits in
\fI<pack\-index>\fR\&.
.sp
.if n \{\
.RS 4
.\}
.nf
$ echo <pack\-index> | git commit\-graph write \-\-stdin\-packs
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Write a commit\-graph file containing all reachable commits\&.
.sp
.if n \{\
.RS 4
.\}
.nf
$ git show\-ref \-s | git commit\-graph write \-\-stdin\-commits
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Write a commit\-graph file containing all commits in the current commit\-graph file along with those reachable from
\fBHEAD\fR\&.
.sp
.if n \{\
.RS 4
.\}
.nf
$ git rev\-parse HEAD | git commit\-graph write \-\-stdin\-commits \-\-append
.fi
.if n \{\
.RE
.\}
.RE
.SH "CONFIGURATION"
.sp
Everything below this line in this section is selectively included from the \fBgit-config\fR(1) documentation\&. The content is the same as what\(cqs found there:
.PP
commitGraph\&.generationVersion
.RS 4
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\&.
.RE
.PP
commitGraph\&.maxNewFilters
.RS 4
Specifies the default value for the
\fB\-\-max\-new\-filters\fR
option of
\fBgit\fR
\fBcommit\-graph\fR
\fBwrite\fR
(c\&.f\&.,
\fBgit-commit-graph\fR(1))\&.
.RE
.PP
commitGraph\&.readChangedPaths
.RS 4
Deprecated\&. Equivalent to commitGraph\&.changedPathsVersion=\-1 if true, and commitGraph\&.changedPathsVersion=0 if false\&. (If commitGraph\&.changedPathVersion is also set, commitGraph\&.changedPathsVersion takes precedence\&.)
.RE
.PP
commitGraph\&.changedPathsVersion
.RS 4
Specifies the version of the changed\-path Bloom filters that Git will read and write\&. May be \-1, 0, 1, or 2\&. Note that values greater than 1 may be incompatible with older versions of Git which do not yet understand those versions\&. Use caution when operating in a mixed\-version environment\&.
.sp
Defaults to \-1\&.
.sp
If \-1, Git will use the version of the changed\-path Bloom filters in the repository, defaulting to 1 if there are none\&.
.sp
If 0, Git will not read any Bloom filters, and will write version 1 Bloom filters when instructed to write\&.
.sp
If 1, Git will only read version 1 Bloom filters, and will write version 1 Bloom filters\&.
.sp
If 2, Git will only read version 2 Bloom filters, and will write version 2 Bloom filters\&.
.sp
See
\fBgit-commit-graph\fR(1)
for more information\&.
.RE
.SH "FILE FORMAT"
.sp
see \fBgitformat-commit-graph\fR(5)\&.
.SH "GIT"
.sp
Part of the \fBgit\fR(1) suite