fix: Source maps not correctly referenced.

The default mapRoot setting and code generation does not work with typescript 1.8+ as noted in the comments for the "fixSourceMapSources" function in broccoli-typescript.js. I removed the "fixSourceMapSources" function and also removed the default mapRoot setting. This fix was suggested by KirNekrasov in his comments to the bug.

angular#1266

Author: wholladay

addon/ng2/blueprints/ng2/files/__path__/tsconfig.json

@@ -4,7 +4,6 @@
     "declaration": false,
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
-    "mapRoot": "/",
     "module": "commonjs",
     "moduleResolution": "node",
     "noEmitOnError": true,

lib/broccoli/broccoli-typescript.js

@@ -205,8 +205,7 @@ class BroccoliTypeScriptCompiler extends Plugin {
     }
 
     fse.mkdirsSync(path.dirname(absoluteFilePath));
-    const content = this.fixSourceMapSources(fileContent, inputFilePath);
-    fs.writeFileSync(absoluteFilePath, content, FS_OPTS);
+    fs.writeFileSync(absoluteFilePath, fileContent, FS_OPTS);
 
     fse.mkdirsSync(path.dirname(outputFilePath));
     try {
@@ -232,52 +231,6 @@ class BroccoliTypeScriptCompiler extends Plugin {
       outputs: new Set()
     };
   }
-
-  /**
-   * There is a bug in TypeScript 1.6, where the sourceRoot and inlineSourceMap properties
-   * are exclusive. This means that the sources property always contains relative paths
-   * (e.g, ../../../../@angular/di/injector.ts).
-   *
-   * Here, we normalize the sources property and remove the ../../../
-   *
-   * This issue is fixed in https://github.com/Microsoft/TypeScript/pull/5620.
-   * Once we switch to TypeScript 1.8, we can remove this method.
-   */
-  fixSourceMapSources(content, inputFilePath) {
-    try {
-      const marker = '//# sourceMappingURL=data:application/json;base64,';
-
-      let index = content.indexOf(marker);
-      if (index == -1) {
-        const pathMarker = '//# sourceMappingURL=';
-        index = content.indexOf(pathMarker);
-        if (index == -1) {
-          return content;
-        }
-
-        // We have a regular path, make it relative to the input path.
-        let base = content.substring(0, index + pathMarker.length);
-        let mapPath = content.substring(index + pathMarker.length);
-        if (mapPath.startsWith(this.outputPath)) {
-          mapPath = mapPath.replace(this.outputPath, this.inputPaths[0]);
-        } else if (!mapPath.startsWith(this.inputPaths[0])) {
-          mapPath = path.join(this.inputPaths[0], path.dirname(this._tsConfigPath), mapPath);
-        }
-
-        mapPath = path.relative(path.dirname(inputFilePath), mapPath);
-        return '' + base + mapPath;
-      }
-
-      var base = content.substring(0, index + marker.length);
-      var sourceMapBit = new Buffer(content.substring(index + marker.length), 'base64').toString('utf8');
-      var sourceMaps = JSON.parse(sourceMapBit);
-      var source = sourceMaps.sources[0];
-      sourceMaps.sources = [source.substring(source.lastIndexOf('../') + 3)];
-      return '' + base + new Buffer(JSON.stringify(sourceMaps)).toString('base64');
-    } catch (e) {
-      return content;
-    }
-  }
 }
 
 class CustomLanguageServiceHost {