'\" t
.\"     Title: git-index-pack
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 02/22/2023
.\"    Manual: Git Manual
.\"    Source: Git 2.30.2
.\"  Language: English
.\"
.TH "GIT\-INDEX\-PACK" "1" "02/22/2023" "Git 2\&.30\&.2" "Git Manual"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
git-index-pack \- Build pack index file for an existing packed archive
.SH "SYNOPSIS"
.sp
.nf
\fIgit index\-pack\fR [\-v] [\-o <index\-file>] <pack\-file>
\fIgit index\-pack\fR \-\-stdin [\-\-fix\-thin] [\-\-keep] [\-v] [\-o <index\-file>]
                 [<pack\-file>]
.fi
.sp
.SH "DESCRIPTION"
.sp
Reads a packed archive (\&.pack) from the specified file, and builds a pack index file (\&.idx) for it\&. The packed archive together with the pack index can then be placed in the objects/pack/ directory of a Git repository\&.
.SH "OPTIONS"
.PP
\-v
.RS 4
Be verbose about what is going on, including progress status\&.
.RE
.PP
\-o <index\-file>
.RS 4
Write the generated pack index into the specified file\&. Without this option the name of pack index file is constructed from the name of packed archive file by replacing \&.pack with \&.idx (and the program fails if the name of packed archive does not end with \&.pack)\&.
.RE
.PP
\-\-stdin
.RS 4
When this flag is provided, the pack is read from stdin instead and a copy is then written to <pack\-file>\&. If <pack\-file> is not specified, the pack is written to objects/pack/ directory of the current Git repository with a default name determined from the pack content\&. If <pack\-file> is not specified consider using \-\-keep to prevent a race condition between this process and
\fIgit repack\fR\&.
.RE
.PP
\-\-fix\-thin
.RS 4
Fix a "thin" pack produced by
\fBgit pack\-objects \-\-thin\fR
(see
\fBgit-pack-objects\fR(1)
for details) by adding the excluded objects the deltified objects are based on to the pack\&. This option only makes sense in conjunction with \-\-stdin\&.
.RE
.PP
\-\-keep
.RS 4
Before moving the index into its final destination create an empty \&.keep file for the associated pack file\&. This option is usually necessary with \-\-stdin to prevent a simultaneous
\fIgit repack\fR
process from deleting the newly constructed pack and index before refs can be updated to use objects contained in the pack\&.
.RE
.PP
\-\-keep=<msg>
.RS 4
Like \-\-keep create a \&.keep file before moving the index into its final destination, but rather than creating an empty file place
\fI<msg>\fR
followed by an LF into the \&.keep file\&. The
\fI<msg>\fR
message can later be searched for within all \&.keep files to locate any which have outlived their usefulness\&.
.RE
.PP
\-\-index\-version=<version>[,<offset>]
.RS 4
This is intended to be used by the test suite only\&. It allows to force the version for the generated pack index, and to force 64\-bit index entries on objects located above the given offset\&.
.RE
.PP
\-\-strict
.RS 4
Die, if the pack contains broken objects or links\&.
.RE
.PP
\-\-check\-self\-contained\-and\-connected
.RS 4
Die if the pack contains broken links\&. For internal use only\&.
.RE
.PP
\-\-fsck\-objects
.RS 4
Die if the pack contains broken objects\&. For internal use only\&.
.RE
.PP
\-\-threads=<n>
.RS 4
Specifies the number of threads to spawn when resolving deltas\&. This requires that index\-pack be compiled with pthreads otherwise this option is ignored with a warning\&. This is meant to reduce packing time on multiprocessor machines\&. The required amount of memory for the delta search window is however multiplied by the number of threads\&. Specifying 0 will cause Git to auto\-detect the number of CPU\(cqs and use maximum 3 threads\&.
.RE
.PP
\-\-max\-input\-size=<size>
.RS 4
Die, if the pack is larger than <size>\&.
.RE
.PP
\-\-object\-format=<hash\-algorithm>
.RS 4
Specify the given object format (hash algorithm) for the pack\&. The valid values are
\fIsha1\fR
and (if enabled)
\fIsha256\fR\&. The default is the algorithm for the current repository (set by
\fBextensions\&.objectFormat\fR), or
\fIsha1\fR
if no value is set or outside a repository\&.
.sp
This option cannot be used with \-\-stdin\&.
.sp
THIS OPTION IS EXPERIMENTAL! SHA\-256 support is experimental and still in an early stage\&. A SHA\-256 repository will in general not be able to share work with "regular" SHA\-1 repositories\&. It should be assumed that, e\&.g\&., Git internal file formats in relation to SHA\-256 repositories may change in backwards\-incompatible ways\&. Only use
\fB\-\-object\-format=sha256\fR
for testing purposes\&.
.RE
.SH "NOTES"
.sp
Once the index has been created, the hash that goes into the name of the pack/idx file is printed to stdout\&. If \-\-stdin was also used then this is prefixed by either "pack\et", or "keep\et" if a new \&.keep file was successfully created\&. This is useful to remove a \&.keep file used as a lock to prevent the race with \fIgit repack\fR mentioned above\&.
.SH "GIT"
.sp
Part of the \fBgit\fR(1) suite