code: function triggerBuild() {
  
    // Pick command lines options that take precedence
    var cmdConfig = _.pick(argv, ['files', 'verbose']);;
  
    // load config file and merge into config
    var jsonConfig = loadConfig(argv.config || 'magicbook.json');
    _.defaults(cmdConfig, jsonConfig);
  
    // trigger the build with the new config
    buildFunction(cmdConfig);
  
    return cmdConfig;
  
  }
docs: Trigger a build