docs: def main():
      '''the main entry point for the HelpMe Command line application. Currently,
         the user can request help or set config values for a particular helper.
      '''
  
      # Customize parser
  
      parser = get_parser()
      subparsers = get_subparsers(parser)
  
      def help(return_code=0):
          '''print help, including the software version and active client 
             and exit with return code.
          '''
  
          version = helpme.__version__
          
          bot.custom(message='Command Line Tool v%s' %version,
                     prefix='\n[HelpMe] ', 
                     color='CYAN')
  
          parser.print_help()
          sys.exit(return_code)
      
      # If the user didn't provide any arguments, show the full help
      if len(sys.argv) == 1:
          help()
      try:
          args, unknown = parser.parse_known_args()
      except:
          sys.exit(0)
  
      extras = None
      if args.command in HELPME_HELPERS and len(unknown) > 0:
          extras = unknown
  
      # if environment logging variable not set, make silent
  
      if args.debug is False:
          os.environ['MESSAGELEVEL'] = "INFO"
  
      # Show the version and exit
      if args.version is True:
          print(helpme.__version__)
          sys.exit(0)
  
      if args.command == "config": from .config import main
      if args.command == "list": from .list import main
      if args.command in HELPME_HELPERS: from .help import main
  
      # Pass on to the correct parser
      return_code = 0
      try:
          main(args, extras)
          sys.exit(return_code)
      except UnboundLocalError:
          return_code = 1
  
      help(return_code)