fix(gulp): Fail lint task on error

.eslintrc

@@ -12,6 +12,10 @@
 	},
 	"root": true,
 	"rules": {
+		"comma-dangle": [
+			"warn",
+			"only-multiline",
+		],
 //		"indent": [
 //			"error",
 //			"tab",
@@ -34,7 +38,6 @@
 			"warn",
 			{
 				"args": "none",
-				"argsIgnorePattern": "^_",
 				"varsIgnorePattern": "^_",
 			}
 		],
@@ -61,7 +64,13 @@
 			},
 			"parserOptions": {
 				"ecmaVersion": 2015,
-			}
+			},
+			"rules": {
+				"comma-dangle": [
+					"error",
+					"always-multiline",
+				],
+			},
 		},
 		{
 			"files": [

code.js

@@ -18,7 +18,8 @@ $$('[data-src][data-type="text/html"]').forEach(function(element) {
 				// Run JS
 
 				$$('script', element).forEach(function (script) {
-					var after = script.nextSibling, parent = script.parentNode;
+					var _after = script.nextSibling,
+						parent = script.parentNode;
 					parent.removeChild(script);
 					document.head.appendChild(script);
 				});

gulpfile.js

@@ -19,17 +19,17 @@ const paths = {
 		'components/prism-css.js',
 		'components/prism-clike.js',
 		'components/prism-javascript.js',
-		'plugins/file-highlight/prism-file-highlight.js'
+		'plugins/file-highlight/prism-file-highlight.js',
 	],
 	plugins: ['plugins/**/*.js', '!plugins/**/*.min.js'],
 	showLanguagePlugin: 'plugins/show-language/prism-show-language.js',
 	autoloaderPlugin: 'plugins/autoloader/prism-autoloader.js',
-	changelog: 'CHANGELOG.md'
+	changelog: 'CHANGELOG.md',
 };
 
 const componentsPromise = new Promise((resolve, reject) => {
 	fs.readFile(paths.componentsFile, {
-		encoding: 'utf-8'
+		encoding: 'utf-8',
 	}, (err, data) => {
 		if (!err) {
 			resolve(JSON.parse(data));
@@ -58,7 +58,7 @@ function inlineRegexSource() {
 function minifyJS() {
 	return [
 		inlineRegexSource(),
-		uglify()
+		uglify(),
 	];
 }
 
@@ -67,6 +67,7 @@ function lint(cb) {
 		src(['**/*.js', '!node_modules/**'], { base: './' }),
 		eslint(),
 		eslint.format(),
+		eslint.failAfterError(),
 	], cb);
 }
 
@@ -155,7 +156,7 @@ function languagePlugins(cb) {
 
 		const tasks = [
 			{ plugin: paths.showLanguagePlugin, map: jsonLanguagesMap },
-			{ plugin: paths.autoloaderPlugin, map: jsonDependenciesMap }
+			{ plugin: paths.autoloaderPlugin, map: jsonDependenciesMap },
 		];
 
 		let cpt = 0;
@@ -192,7 +193,7 @@ function changelog(cb) {
 			/\[[\da-f]+(?:, *[\da-f]+)*\]/g,
 			m => m.replace(/([\da-f]{7})[\da-f]*/g, '[`$1`](https://github.com/PrismJS/prism/commit/$1)')
 		),
-		dest('.')
+		dest('.'),
 	], cb);
 }