git-index-pack(1) — Linux manual page


GIT-INDEX-PACK(1)              Git Manual              GIT-INDEX-PACK(1)

NAME         top

       git-index-pack - Build pack index file for an existing packed

SYNOPSIS         top

       git index-pack [-v] [-o <index-file>] [--[no-]rev-index] <pack-file>
       git index-pack --stdin [--fix-thin] [--keep] [-v] [-o <index-file>]
                         [--[no-]rev-index] [<pack-file>]

DESCRIPTION         top

       Reads a packed archive (.pack) from the specified file, and
       builds a pack index file (.idx) for it. Optionally writes a
       reverse-index (.rev) for the specified pack. The packed archive
       together with the pack index can then be placed in the
       objects/pack/ directory of a Git repository.

OPTIONS         top

           Be verbose about what is going on, including progress status.

       -o <index-file>
           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).

           When this flag is provided, generate a reverse index (a .rev
           file) corresponding to the given pack. If --verify is given,
           ensure that the existing reverse index is correct. Takes
           precedence over pack.writeReverseIndex.

           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 git repack.

           Fix a "thin" pack produced by git pack-objects --thin (see
           git-pack-objects(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.

           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 git
           repack process from deleting the newly constructed pack and
           index before refs can be updated to use objects contained in
           the pack.

           Like --keep create a .keep file before moving the index into
           its final destination, but rather than creating an empty file
           place <msg> followed by an LF into the .keep file. The <msg>
           message can later be searched for within all .keep files to
           locate any which have outlived their usefulness.

           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

           Die, if the pack contains broken objects or links.

           Die if the pack contains broken links. For internal use only.

           For internal use only.

           Die if the pack contains broken objects. If the pack contains
           a tree pointing to a .gitmodules blob that does not exist,
           prints the hash of that blob (for the caller to check) after
           the hash that goes into the name of the pack/idx file (see

           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’s and use maximum 3 threads.

           Die, if the pack is larger than <size>.

           Specify the given object format (hash algorithm) for the
           pack. The valid values are sha1 and (if enabled) sha256. The
           default is the algorithm for the current repository (set by
           extensions.objectFormat), or sha1 if no value is set or
           outside a repository.

           This option cannot be used with --stdin.

           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
           --object-format=sha256 for testing purposes.

NOTES         top

       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\t", or "keep\t" 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 git repack
       mentioned above.

GIT         top

       Part of the git(1) suite

COLOPHON         top

       This page is part of the git (Git distributed version control
       system) project.  Information about the project can be found at
       ⟨⟩.  If you have a bug report for this manual
       page, see ⟨⟩.  This page was obtained
       from the project's upstream Git repository
       ⟨⟩ on 2021-08-27.  (At that time,
       the date of the most recent commit that was found in the
       repository was 2021-08-24.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

Git         08/27/2021              GIT-INDEX-PACK(1)

Pages that refer to this page: git(1)git-bundle(1)git-config(1)git-pack-objects(1)git-show-index(1)