docs: def main(argv):
    """Main."""
    del argv  # Unused.
    server_startup.Init()
  
    filename = flags.FLAGS.filename
    if not os.path.exists(filename):
      print("File %s does not exist" % filename)
      return
  
    with aff4.FACTORY.Create(
        filestore.NSRLFileStore.PATH,
        filestore.NSRLFileStore,
        mode="rw",
        token=aff4.FACTORY.root_token) as store:
      imported = ImportFile(store, filename, flags.FLAGS.start)
      data_store.DB.Flush()
      print("Imported %d hashes" % imported)