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

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

       git index-pack [-v] [-o <index-file>] <pack-file>
       git index-pack --stdin [--fix-thin] [--keep] [-v] [-o <index-file>]

       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.

           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, 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 offset.

           Die, if the pack contains broken objects or links.

           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

       Once the index has been created, the list of object names is sorted and the SHA1 hash of that list 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.

       Part of the git(1) suite

Git                      08/29/2012                 GIT-INDEX-PACK(1)