git-index-pack - Build pack index file for an existing packed archive
git index-pack [-v] [-o <index-file>] [--[no-]rev-index] <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. 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.
Set the title of the progress bar. The title is "Receiving objects" by default and "Indexing objects" when --stdin is specified.
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 "Notes").
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.
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.
Part of the git(1) suite