Upgrade to eslint

We're going to want to use a newer version of JSHint
anyway to support use of ES6 in our browser tests so now
seems a good time to do this.

Bug: T149202
Change-Id: I5526b020cfc12c0e065ad15ed711a0e3a7bff1bc

.eslintrc.json

@@ -0,0 +1,17 @@
+{
+	"extends": "wikimedia",
+	"env": {
+		"browser": true,
+		"jquery": true,
+		"qunit": true
+	},
+	"globals": {
+		"mw": false,
+		"OO": false,
+		"mediaWiki": false,
+		"require": false
+	},
+	"rules": {
+		"no-use-before-define": 1
+	}
+}

.jscsrc

@@ -1,4 +0,0 @@
-{
-	"preset": "wikimedia",
-	"excludeFiles": [ "node_modules/**" ]
-}

.jshintignore

@@ -1 +0,0 @@
-node_modules

.jshintrc

@@ -1,23 +0,0 @@
-{
-	// Enforcing
-	"bitwise": true,
-	"eqeqeq": true,
-	"es3": true,
-	"freeze": true,
-	"latedef": true,
-	"noarg": true,
-	"nonew": true,
-	"undef": true,
-	"unused": true,
-
-	// Environment
-	"browser": true,
-	"jquery": true,
-
-	"globals": {
-		"mw": false,
-		"mediaWiki": false,
-		"OO": false,
-		"QUnit": false
-	}
-}

Gruntfile.js

@@ -1,17 +1,13 @@
-/*jshint node:true */
+/* jshint node:true */
 module.exports = function ( grunt ) {
 	var conf = grunt.file.readJSON( 'extension.json' );
 
-	grunt.loadNpmTasks( 'grunt-contrib-jshint' );
+	grunt.loadNpmTasks( 'grunt-eslint' );
 	grunt.loadNpmTasks( 'grunt-jsonlint' );
 	grunt.loadNpmTasks( 'grunt-banana-checker' );
-	grunt.loadNpmTasks( 'grunt-jscs' );
 
 	grunt.initConfig( {
-		jshint: {
-			options: {
-				jshintrc: true
-			},
+		eslint: {
 			all: '.'
 		},
 		jscs: {
@@ -26,6 +22,6 @@ module.exports = function ( grunt ) {
 		}
 	} );
 
-	grunt.registerTask( 'test', [ 'jshint', 'jscs', 'jsonlint', 'banana' ] );
+	grunt.registerTask( 'test', [ 'eslint', 'jsonlint', 'banana' ] );
 	grunt.registerTask( 'default', 'test' );
 };

package.json

@@ -4,11 +4,11 @@
     "test": "grunt test"
   },
   "devDependencies": {
+    "eslint-config-wikimedia": "^0.3.0",
     "grunt": "0.4.5",
-    "grunt-cli": "0.1.13",
-    "grunt-contrib-jshint": "0.11.3",
     "grunt-banana-checker": "0.4.0",
-    "grunt-jscs": "2.4.0",
+    "grunt-cli": "0.1.13",
+    "grunt-eslint": "^19.0.0",
     "grunt-jsonlint": "1.0.7"
   }
 }

resources/ext.relatedArticles.readMore.bootstrap/index.js

@@ -9,7 +9,7 @@
 		),
 		LIMIT = 3,
 		debouncedLoad = $.debounce( 100, function () {
-			loadRelatedArticles();
+			loadRelatedArticles(); // eslint-disable-line
 		} ),
 		$window = $( window ),
 		shouldShowReadMore;

resources/ext.relatedArticles.readMore.eventLogging/index.js

@@ -25,7 +25,7 @@
 		mw.config.get( 'wgRelatedArticlesLoggingSamplingRate', 0 ),
 		{
 			pageId: mw.config.get( 'wgArticleId' ),
-			skin: ( skin === 'minerva' ) ? skin + '-' +  mw.config.get( 'wgMFMode' ) : skin,
+			skin: ( skin === 'minerva' ) ? skin + '-' + mw.config.get( 'wgMFMode' ) : skin,
 			// We cannot depend on the uniqueness of mw.user.generateRandomSessionId(),
 			// thus append the timestamp. See mw.user documentation for more info.
 			userSessionToken: mw.user.generateRandomSessionId() +

resources/ext.relatedArticles.readMore.gateway/RelatedPagesGateway.js

@@ -31,6 +31,15 @@
 	}
 	OO.initClass( RelatedPagesGateway );
 
+	/**
+	 * @ignore
+	 * @param {Object} result
+	 * @return {Array}
+	 */
+	function getPages( result ) {
+		return result && result.query && result.query.pages ? result.query.pages : [];
+	}
+
 	/**
 	 * Gets the related pages for the current page.
 	 *
@@ -101,12 +110,5 @@
 			.then( getPages );
 	};
 
-	/**
-	 * @ignore
-	 */
-	function getPages( result ) {
-		return result && result.query && result.query.pages ? result.query.pages : [];
-	}
-
 	mw.relatedPages.RelatedPagesGateway = RelatedPagesGateway;
 }( jQuery, mediaWiki ) );