Gruntfile.js


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module.exports = function(grunt) {
  // Load the include-all library in order to require all of our grunt
  // configurations and task registrations dynamically.
  var includeAll;

  try {
    includeAll = require('include-all');
  }
  catch (e0) {
    console.error('Could not find `include-all` module.');
    console.error('Skipping grunt tasks...');
    console.error('To fix this, please run:');
    console.error('npm install include-all --save-dev');
    console.error();
  }

  /**
   * Loads Grunt configuration modules from the specified
   * relative path. These modules should export a function
   * that, when run, should either load/configure or register
   * a Grunt task.
   * @param {String} relPath
   * @return {function}
   */
  function loadTasks(relPath) {
    return includeAll({
      dirname: require('path').resolve(__dirname, relPath),
      filter: /(.+)\.js$/
    }) || {};
  }

  /**
   * Invokes the function from a Grunt configuration module with
   * a single argument - the `grunt` object.
   * @param {Object} tasks
   * @return {void}
   */
  function invokeConfigFn(tasks) {
    for (var taskName in tasks) {
      if (tasks.hasOwnProperty(taskName)) {
        tasks[taskName](grunt);
      }
    }
  }

  // Load task functions
  var taskConfigurations = loadTasks('./tasks/config');
  var registerDefinitions = loadTasks('./tasks/register');

  // Run task functions to configure Grunt.
  invokeConfigFn(taskConfigurations);
  invokeConfigFn(registerDefinitions);
};