feat(Grunt): Add source maps

lib/grunt/utils.js

@@ -89,7 +89,8 @@ module.exports = {
       .replace(/"NG_VERSION_MINOR"/, NG_VERSION.minor)
       .replace(/"NG_VERSION_DOT"/, NG_VERSION.dot)
       .replace(/"NG_VERSION_CDN"/, NG_VERSION.cdn)
-      .replace(/"NG_VERSION_CODENAME"/, NG_VERSION.codename);
+      .replace(/"NG_VERSION_CODENAME"/, NG_VERSION.codename)
+      .replace(/"NG_SOURCE_MAP"/, NG_VERSION.sourcemap);
     if (strict !== false) processed = this.singleStrict(processed, '\n\n', true);
     return processed;
   },
@@ -98,12 +99,20 @@ module.exports = {
   build: function(config, fn){
     var files = grunt.file.expand(config.src);
     var styles = config.styles;
+    //sourcemap
+    var NG_VERSION = grunt.config('NG_VERSION');
+    var sourcemapPrefix = '//@ sourceMappingURL=';
+    var sourceMappingURL = config.dest
+      .replace('build/', '')
+      .replace(/\.js$/, '-' + NG_VERSION.full + '.min.js.map');
+
+    NG_VERSION.sourcemap = sourcemapPrefix + sourceMappingURL;
     //concat
     var src = files.map(function(filepath){
       return grunt.file.read(filepath);
     }).join(grunt.util.normalizelf('\n'));
     //process
-    var processed = this.process(src, grunt.config('NG_VERSION'), config.strict);
+    var processed = this.process(src, NG_VERSION, config.strict);
     if (styles) processed = this.addStyle(processed, styles.css, styles.minify);
     //write
     grunt.file.write(config.dest, processed);
@@ -121,17 +130,22 @@ module.exports = {
 
 
   min: function(file, done) {
+    var NG_VERSION = grunt.config('NG_VERSION');
     var minFile = file.replace(/\.js$/, '.min.js');
+    var mapFile = file.replace(/\.js$/, '-' + NG_VERSION.full + '.min.js.map');
     shell.exec(
         'java ' +
             this.java32flags() + ' ' +
             '-jar lib/closure-compiler/compiler.jar ' +
             '--compilation_level SIMPLE_OPTIMIZATIONS ' +
             '--language_in ECMASCRIPT5_STRICT ' +
+            '--source_map_format=V3 ' +
+            '--create_source_map ' + mapFile + ' ' +
             '--js ' + file + ' ' +
             '--js_output_file ' + minFile,
       function(code) {
         if (code !== 0) grunt.fail.warn('Error minifying ' + file);
+        grunt.file.write(mapFile, grunt.file.read(mapFile).replace('"sources":["build/','"sources":["'));
         grunt.file.write(minFile, this.singleStrict(grunt.file.read(minFile), '\n'));
         grunt.log.ok(file + ' minified into ' + minFile);
         done();

src/angular.prefix

@@ -2,5 +2,6 @@
  * @license AngularJS v"NG_VERSION_FULL"
  * (c) 2010-2012 Google, Inc. http://angularjs.org
  * License: MIT
+ * "NG_SOURCE_MAP"
  */
 (function(window, document, undefined) {

src/loader.prefix

@@ -2,6 +2,7 @@
  * @license AngularJS v"NG_VERSION_FULL"
  * (c) 2010-2012 Google, Inc. http://angularjs.org
  * License: MIT
+ * "NG_SOURCE_MAP"
  */
 'use strict';
 (

src/module.prefix

@@ -2,5 +2,6 @@
  * @license AngularJS v"NG_VERSION_FULL"
  * (c) 2010-2012 Google, Inc. http://angularjs.org
  * License: MIT
+ * "NG_SOURCE_MAP"
  */
 (function(window, angular, undefined) {