anchor.diff:          defaultsTo: null);
   
       //
  -    // Daemon mode is the process where we scan for new packages and check
  -    // status of compute engine instances.
  -    //
       // Client mode is where we generate the actual documentation packages
       // and publish them to pub.dartlang.org.
  +    //
       parser.addOption(
           'mode',
           help: 'Path to the sdk. Required.',
  
positive.code:             _printUsage(parser);
            }
          });
  
      //
      // Daemon options
      //
      parser.addOption(
          'sleep-interval',
          help: 'Time requred to sleep in seconds before polling for new packages on pub.dartlang.org',
          defaultsTo: null);
      parser.addOption(
          'max-clients',
          help: 'Max number of possible client instances to fire up.',
          defaultsTo: null);
  
      //
      // Client options
  
negative.code:   copyPackageBuildInfo(package, version);
  }
  
  ArgParser _createArgsParser() {
    ArgParser parser = new ArgParser();
      parser.addFlag('help',
          abbr: 'h',
  