Breaking: v6 with backward compatibility

.eslintrc.json

@@ -10,14 +10,13 @@
         "plugin:react/recommended"
     ],
     "globals": {
-        "Promise": true,
         "requirejs": true,
-        "Backbone": true,
-        "$": true,
-        "ENUM": true,
-        "Modernizr": true,
-        "_": true,
-        "Handlebars": true,
+        "Backbone": "off",
+        "$": "off",
+        "ENUM": "off",
+        "Modernizr": "off",
+        "_": "off",
+        "Handlebars": "off",
         "Atomics": "readonly",
         "SharedArrayBuffer": "readonly"
     },
@@ -31,6 +30,29 @@
         "requirejs"
     ],
     "rules": {
+        "no-restricted-globals": [
+            "error",
+            {
+                "name": "ENUM",
+                "message": "Use: import ENUM from 'enum';"
+            },
+            {
+                "name": "Backbone",
+                "message": "Use: import Backbone from 'backbone';"
+            },
+            {
+                "name": "Handlebars",
+                "message": "Use: import Handlebars from 'handlebars';"
+            },
+            {
+                "name": "_",
+                "message": "Use: import _ from 'underscore';"
+            },
+            {
+                "name": "$",
+                "message": "Use: import $ from 'jquery';"
+            }
+        ],
         "indent": ["error", 2, { "SwitchCase": 1 }],
         "array-bracket-spacing": "off",
         "semi": ["error", "always"],

.gitignore

@@ -5,8 +5,13 @@ src/extensions
 src/less
 src/less/adapt.less
 src/plugins.js
-build
 bower_components
-node_modules
 .DS_Store
-.idea
+.idea
+build/*
+!build/course
+!build/course/*
+build/course/*/language_data_manifest.js
+node_modules
+src/node_modules/
+src/package-lock.json

Gruntfile.js

@@ -1,8 +1,8 @@
 var path = require('path');
 
 module.exports = function(grunt) {
-  var helpers = require('./grunt/helpers')(grunt);
-
+  const helpers = require('./grunt/helpers')(grunt);
+  grunt.option('helpers', helpers);
   require('time-grunt')(grunt);
   require('load-grunt-config')(grunt, {
     data: helpers.generateConfigData(),
@@ -14,8 +14,6 @@ module.exports = function(grunt) {
       }
     }
   });
-
-  grunt.config('helpers', helpers);
   grunt.registerTask('default', ['help']);
 };