code: def version_option(f):
      
  
      def callback(ctx, param, value):
          # copied from click.decorators.version_option
          # no idea what resilient_parsing means, but...
          if not value or ctx.resilient_parsing:
              return
  
          print_version()
          ctx.exit(0)
  
      return click.option(
          "--version",
          is_flag=True,
          expose_value=False,
          is_eager=True,
          callback=callback,
          cls=HiddenOption,
      )(f)
docs: Largely a custom clone of click.version_option -- almost identical, but
      prints our special output.