docs: def run(opts, args):
          '''The run method for the 'run' command. Executes a plugin from the
          command line.
          '''
          setup_options(opts)
  
          mode = Modes.ONCE
          if len(args) > 0 and hasattr(Modes, args[0].upper()):
              _mode = args.pop(0).upper()
              mode = getattr(Modes, _mode)
  
          url = None
          if len(args) > 0:
              # A url was specified
              url = args.pop(0)
  
          plugin_mgr = PluginManager.load_plugin_from_addonxml(mode, url)
          plugin_mgr.run()