chore(build): add jscs code style check to our build

Closes #6062

Author: IgorMinar

.jscs.json

@@ -0,0 +1,3 @@
+{
+  "disallowKeywords": ["with"]
+}

.jscs.json.todo

@@ -0,0 +1,22 @@
+// This is an incomplete TODO list of checks we want to start enforcing
+//
+// The goal is to enable these checks one by one by moving them to .jscs.json along with commits
+// that correct the existing code base issues and make the new check pass.
+
+{
+  "requireCurlyBraces": ["if", "else", "for", "while", "do", "try", "catch"],
+  "requireSpaceAfterKeywords": ["if", "else", "for", "while", "do", "switch", "return", "try", "catch"],
+  "disallowLeftStickedOperators": ["?", "+", "-", "/", "*", "=", "==", "===", "!=", "!==", ">", ">=", "<", "<="],
+  "disallowRightStickedOperators": ["?", "+", "/", "*", ":", "=", "==", "===", "!=", "!==", ">", ">=", "<", "<="],
+  "requireRightStickedOperators": ["!"],
+  "requireLeftStickedOperators": [","],
+  "disallowImplicitTypeConversion": ["string"],
+  "disallowMultipleLineBreaks": true,
+  "disallowKeywordsOnNewLine": ["else"],
+  "disallowTrailingWhitespace": true,
+  "requireLineFeedAtFileEnd": true,
+  "validateJSDoc": {
+    "checkParamNames": true,
+    "requireParamTypes": true
+  }
+}

Gruntfile.js

@@ -12,6 +12,7 @@ module.exports = function(grunt) {
   grunt.loadNpmTasks('grunt-contrib-jshint');
   grunt.loadNpmTasks('grunt-ddescribe-iit');
   grunt.loadNpmTasks('grunt-jasmine-node');
+  grunt.loadNpmTasks("grunt-jscs-checker");
   grunt.loadNpmTasks('grunt-merge-conflict');
   grunt.loadNpmTasks('grunt-parallel');
   grunt.loadNpmTasks('grunt-shell');
@@ -145,6 +146,13 @@ module.exports = function(grunt) {
       }
     },
 
+    jscs: {
+      src: ['src/**/*.js', 'test/**/*.js'],
+      options: {
+        config: ".jscs.json"
+      }
+    },
+
     build: {
       scenario: {
         dest: 'build/angular-scenario.js',
@@ -301,6 +309,6 @@ module.exports = function(grunt) {
   grunt.registerTask('webserver', ['connect:devserver']);
   grunt.registerTask('package', ['bower','clean', 'buildall', 'minall', 'collect-errors', 'docs', 'copy', 'write', 'compress']);
   grunt.registerTask('package-without-bower', ['clean', 'buildall', 'minall', 'collect-errors', 'docs', 'copy', 'write', 'compress']);
-  grunt.registerTask('ci-checks', ['ddescribe-iit', 'merge-conflict', 'jshint']);
+  grunt.registerTask('ci-checks', ['ddescribe-iit', 'merge-conflict', 'jshint', 'jscs']);
   grunt.registerTask('default', ['package']);
 };

package.json

@@ -8,7 +8,7 @@
     "url": "https://github.com/angular/angular.js.git"
   },
   "devDependencies": {
-    "grunt": "~0.4.1",
+    "grunt": "~0.4.2",
     "bower": "~1.2.2",
     "grunt-bump": "~0.0.13",
     "grunt-contrib-clean": "~0.5.0",
@@ -41,7 +41,8 @@
     "grunt-shell": "~0.4.0",
     "semver": "~2.1.0",
     "lodash": "~2.1.0",
-    "browserstacktunnel-wrapper": "~1.1.1"
+    "browserstacktunnel-wrapper": "~1.1.1",
+    "grunt-jscs-checker": "~0.3.2"
   },
   "licenses": [
     {