Gruntfile.js

var glob = require('glob'),
  path = require('path'),
  join = path.join;

module.exports = function(grunt) {
  var banner = (function() {/*
       ___     __            _          ___  _         _     
      / __\ /\ \ \ ___    __| |  ___   / __\| | _   _ | |__  
     / /   /  \/ // _ \  / _` | / _ \ / /   | || | | || '_ \ 
    / /___/ /\  /| (_) || (_| ||  __// /___ | || |_| || |_) |
    \____/\_\ \/  \___/  \__,_| \___|\____/ |_| \__,_||_.__/ 
*/}).toString().match(/[^]*\/\*([^]*)\*\/\}$/)[1];

  var config = {
    pkg: grunt.file.readJSON('package.json'),
    banner: '/*!' + banner + '\n' +
        '* <%= pkg.name %> - v<%= pkg.version %> -\n' +
        '<%= pkg.homepage ? "* " + pkg.homepage + "\\n" : "" %>' +
        '* Copyright (c) <%= grunt.template.today("yyyy") %> <%= pkg.author.name %> */\n'
  };
  grunt.util._.extend(config, loadConfig('./tasks/options/'));
  grunt.initConfig(config);

  // load all grunt tasks matching the `grunt-*` pattern
  require('load-grunt-tasks')(grunt);

  // load all grunt custom tasks
  grunt.loadTasks('tasks');
};

function loadConfig(configPath) {
  var config = {};

  glob.sync('*', { cwd: configPath })
    .forEach(function(configFile) {
      var prop = configFile.replace(/\.js$/, '');
      config[prop] = require(join(__dirname, configPath, configFile));
    });

  return config;
}