A simple protractor runner task

protractorRunner.js

/*global module, require, process*/
module.exports = function (grunt) {
  'use strict';

  var _ = require('lodash'),
      protractorRunner = require('./node_modules/protractor/lib/runner.js'),
      path = require('path');

  grunt.registerMultiTask('protractor', 'Protractor runner.', function() {
    var done = this.async(),
      options = this.options({
        configFilename: '',
        config: {}
      }),
      configFilePath,
      config;

    grunt.verbose.writeflags(options, 'Options');

    if (options.configFilename) {
      configFilePath = path.resolve(process.cwd(), options.configFilename);
      config = require(configFilePath).config;
      config.specFileBase = path.dirname(configFilePath);
    }

    _.merge(config, options.config);

    grunt.verbose.writeflags(config, 'Runner config');
    protractorRunner.addConfig(config);

    function fail(err) {
      grunt.log.error('Protractor failed.');
      grunt.log.error(err);
      done(false);
    }
    
    try {
      protractorRunner
        .runOnce()
        .then(function () {
          done();
        }, function (err) {
          fail(err);
        });
    } catch (err) {
      fail(err);
    }
  });
};

//Copyright 2013 Angel Yordanov
//
//Permission is hereby granted, free of charge, to any person obtaining
//a copy of this software and associated documentation files (the
//"Software"), to deal in the Software without restriction, including
//without limitation the rights to use, copy, modify, merge, publish,
//distribute, sublicense, and/or sell copies of the Software, and to
//permit persons to whom the Software is furnished to do so, subject to
//the following conditions:
//
//The above copyright notice and this permission notice shall be
//included in all copies or substantial portions of the Software.
//
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
//EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
//MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
//NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
//LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
//OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
//WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.