'\" t
.\"     Title: git-fast-export
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: 05/28/2018
.\"    Manual: Git Manual
.\"    Source: Git 2.1.4
.\"  Language: English
.\"
.TH "GIT\-FAST\-EXPORT" "1" "05/28/2018" "Git 2\&.1\&.4" "Git Manual"
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.SH "NAME"
git-fast-export \- Git data exporter
.SH "SYNOPSIS"
.sp
.nf
\fIgit fast\-export [options]\fR | \fIgit fast\-import\fR
.fi
.sp
.SH "DESCRIPTION"
.sp
This program dumps the given revisions in a form suitable to be piped into \fIgit fast\-import\fR\&.
.sp
You can use it as a human\-readable bundle replacement (see \fBgit-bundle\fR(1)), or as a kind of an interactive \fIgit filter\-branch\fR\&.
.SH "OPTIONS"
.PP
\-\-progress=<n>
.RS 4
Insert
\fIprogress\fR
statements every <n> objects, to be shown by
\fIgit fast\-import\fR
during import\&.
.RE
.PP
\-\-signed\-tags=(verbatim|warn|warn\-strip|strip|abort)
.RS 4
Specify how to handle signed tags\&. Since any transformation after the export can change the tag names (which can also happen when excluding revisions) the signatures will not match\&.
.sp
When asking to
\fIabort\fR
(which is the default), this program will die when encountering a signed tag\&. With
\fIstrip\fR, the tags will silently be made unsigned, with
\fIwarn\-strip\fR
they will be made unsigned but a warning will be displayed, with
\fIverbatim\fR, they will be silently exported and with
\fIwarn\fR, they will be exported, but you will see a warning\&.
.RE
.PP
\-\-tag\-of\-filtered\-object=(abort|drop|rewrite)
.RS 4
Specify how to handle tags whose tagged object is filtered out\&. Since revisions and files to export can be limited by path, tagged objects may be filtered completely\&.
.sp
When asking to
\fIabort\fR
(which is the default), this program will die when encountering such a tag\&. With
\fIdrop\fR
it will omit such tags from the output\&. With
\fIrewrite\fR, if the tagged object is a commit, it will rewrite the tag to tag an ancestor commit (via parent rewriting; see
\fBgit-rev-list\fR(1))
.RE
.PP
\-M, \-C
.RS 4
Perform move and/or copy detection, as described in the
\fBgit-diff\fR(1)
manual page, and use it to generate rename and copy commands in the output dump\&.
.sp
Note that earlier versions of this command did not complain and produced incorrect results if you gave these options\&.
.RE
.PP
\-\-export\-marks=<file>
.RS 4
Dumps the internal marks table to <file> when complete\&. Marks are written one per line as
:markid SHA\-1\&. Only marks for revisions are dumped; marks for blobs are ignored\&. Backends can use this file to validate imports after they have been completed, or to save the marks table across incremental runs\&. As <file> is only opened and truncated at completion, the same path can also be safely given to \-\-import\-marks\&. The file will not be written if no new object has been marked/exported\&.
.RE
.PP
\-\-import\-marks=<file>
.RS 4
Before processing any input, load the marks specified in <file>\&. The input file must exist, must be readable, and must use the same format as produced by \-\-export\-marks\&.
.sp
Any commits that have already been marked will not be exported again\&. If the backend uses a similar \-\-import\-marks file, this allows for incremental bidirectional exporting of the repository by keeping the marks the same across runs\&.
.RE
.PP
\-\-fake\-missing\-tagger
.RS 4
Some old repositories have tags without a tagger\&. The fast\-import protocol was pretty strict about that, and did not allow that\&. So fake a tagger to be able to fast\-import the output\&.
.RE
.PP
\-\-use\-done\-feature
.RS 4
Start the stream with a
\fIfeature done\fR
stanza, and terminate it with a
\fIdone\fR
command\&.
.RE
.PP
\-\-no\-data
.RS 4
Skip output of blob objects and instead refer to blobs via their original SHA\-1 hash\&. This is useful when rewriting the directory structure or history of a repository without touching the contents of individual files\&. Note that the resulting stream can only be used by a repository which already contains the necessary objects\&.
.RE
.PP
\-\-full\-tree
.RS 4
This option will cause fast\-export to issue a "deleteall" directive for each commit followed by a full list of all files in the commit (as opposed to just listing the files which are different from the commit\(cqs first parent)\&.
.RE
.PP
\-\-refspec
.RS 4
Apply the specified refspec to each ref exported\&. Multiple of them can be specified\&.
.RE
.PP
[<git\-rev\-list\-args>\&...]
.RS 4
A list of arguments, acceptable to
\fIgit rev\-parse\fR
and
\fIgit rev\-list\fR, that specifies the specific objects and references to export\&. For example,
master~10\&.\&.master
causes the current master reference to be exported along with all objects added since its 10th ancestor commit\&.
.RE
.SH "EXAMPLES"
.sp
.if n \{\
.RS 4
.\}
.nf
$ git fast\-export \-\-all | (cd /empty/repository && git fast\-import)
.fi
.if n \{\
.RE
.\}
.sp
.sp
This will export the whole repository and import it into the existing empty repository\&. Except for reencoding commits that are not in UTF\-8, it would be a one\-to\-one mirror\&.
.sp
.if n \{\
.RS 4
.\}
.nf
$ git fast\-export master~5\&.\&.master |
        sed "s|refs/heads/master|refs/heads/other|" |
        git fast\-import
.fi
.if n \{\
.RE
.\}
.sp
.sp
This makes a new branch called \fIother\fR from \fImaster~5\&.\&.master\fR (i\&.e\&. if \fImaster\fR has linear history, it will take the last 5 commits)\&.
.sp
Note that this assumes that none of the blobs and commit messages referenced by that revision range contains the string \fIrefs/heads/master\fR\&.
.SH "LIMITATIONS"
.sp
Since \fIgit fast\-import\fR cannot tag trees, you will not be able to export the linux\&.git repository completely, as it contains a tag referencing a tree instead of a commit\&.
.SH "GIT"
.sp
Part of the \fBgit\fR(1) suite