update linters & their configs; add ESLint

.eslintrc

@@ -0,0 +1,52 @@
+{
+    "env": {
+        "node": true
+    },
+    "rules": {
+        "block-scoped-var": 2,
+        "brace-style": [2, "stroustrup"],
+        "camelcase": 2,
+        "comma-spacing": [2, {"before": false, "after": true}],
+        "comma-style": [2, "last"],
+        "consistent-this": [2, "self"],
+        "curly": 2,
+        "eol-last": 2,
+        "eqeqeq": 2,
+        "key-spacing": [2, {"beforeColon": false, "afterColon": true}],
+        "new-cap": 2,
+        "new-parens": 2,
+        "no-array-constructor": 2,
+        "no-bitwise": 2,
+        "no-constant-condition": 0,
+        "no-floating-decimal": 2,
+        "no-inline-comments": 0,
+        "no-irregular-whitespace": 2,
+        "no-mixed-spaces-and-tabs": 2,
+        "no-multi-spaces": 2,
+        "no-multiple-empty-lines": 0,
+        "no-new-object": 2,
+        "no-process-env": 2,
+        "no-reserved-keys": 0,
+        "no-self-compare": 2,
+        "no-space-before-semi": 2,
+        "no-spaced-func": 2,
+        "no-trailing-spaces": 2,
+        "no-underscore-dangle": 0,
+        "no-void": 2,
+        "operator-assignment": [2, "always"],
+        "padded-blocks": 0,
+        "quotes": 0,
+        "radix": 2,
+        "semi": [2, "always"],
+        "space-after-keywords": [2, "always", {"checkFunctionKeyword": true}],
+        "space-before-blocks": [2, "always"],
+        "space-in-brackets": [2, "never"],
+        "space-in-parens": [2, "never"],
+        "space-return-throw-case": 2,
+        "space-unary-ops": [2, {"words": true, "nonwords": false}],
+        "spaced-line-comment": [2, "always"],
+        "vars-on-top": 0,
+        "wrap-iife": [2, "inside"],
+        "yoda": [2, "never"]
+    }
+}

.jscsrc

@@ -12,6 +12,7 @@
   "requireCommaBeforeLineBreak": true,
   "requireCurlyBraces": ["if", "else", "for", "while", "do", "try", "catch", "case", "default"],
   "requireLineFeedAtFileEnd": true,
+  "requireOperatorBeforeLineBreak": ["+", "-", "/", "*", "=", "==", "===", "!=", "!==", ">", "<", ">=", "<="],
   "requireParenthesesAroundIIFE": true,
   "requireSpaceAfterBinaryOperators": ["+", "-", "/", "*", "=", "==", "===", "!=", "!==", ">", "<", ">=", "<="],
   "requireSpaceAfterKeywords": ["if", "else", "for", "while", "do", "switch", "return", "try", "catch"],

.jshintrc

@@ -10,6 +10,7 @@
   "node": true,
   "noempty": true,
   "plusplus": false,
+  "predef": ["exports"],
   "sub": true,
   "undef": true
 }

Gruntfile.js

@@ -23,6 +23,17 @@ module.exports = function (grunt) {
       ]
     },
 
+    eslint: {
+      options: {
+        config: '.eslintrc'
+      },
+      all: [
+        'Gruntfile.js',
+        'tasks/*.js',
+        '<%= nodeunit.tests %>'
+      ]
+    },
+
     jscs: {
       options: {
         config: '.jscsrc'
@@ -41,13 +52,13 @@ module.exports = function (grunt) {
 
     // Configuration to be run (and then tested).
     cssflip: {
-      default_options: {
+      defaultOptions: {
         options: {},
         files: {
           'tmp/default_options.css': 'test/fixtures/example.css'
         }
       },
-      custom_options: {
+      customOptions: {
         options: {
           indent: '    '
         },
@@ -74,7 +85,9 @@ module.exports = function (grunt) {
   // plugin's task(s), then test the result.
   grunt.registerTask('test', ['clean', 'cssflip', 'nodeunit']);
 
+  grunt.registerTask('lint', ['jshint', 'eslint', 'jscs']);
+
   // By default, lint and run all tests.
-  grunt.registerTask('default', ['jshint', 'jscs', 'test']);
+  grunt.registerTask('default', ['lint', 'test']);
 
 };

package.json

@@ -27,7 +27,8 @@
     "grunt-contrib-clean": "~0.6.0",
     "grunt-contrib-jshint": "~0.10.0",
     "grunt-contrib-nodeunit": "~0.4.0",
-    "grunt-jscs": "~0.8.0",
+    "grunt-eslint": "^2.1.0",
+    "grunt-jscs": "^1.1.0",
     "load-grunt-tasks": "^2.0.0"
   },
   "peerDependencies": {

test/css_flip_test.js

@@ -23,11 +23,11 @@ var grunt = require('grunt');
 */
 
 exports.cssflip = {
-  setUp: function(done) {
+  setUp: function (done) {
     // setup here if necessary
     done();
   },
-  default_options: function(test) {
+  defaultOptions: function (test) {
     test.expect(1);
 
     var actual = grunt.file.read('tmp/default_options.css');
@@ -36,7 +36,7 @@ exports.cssflip = {
 
     test.done();
   },
-  custom_options: function(test) {
+  customOptions: function (test) {
     test.expect(1);
 
     var actual = grunt.file.read('tmp/custom_options.css');