anchor.diff:    String workingDirectory = join(BUILD_DOCUMENTATION_ROOT_PATH, packageFolderPath,
         DARTDOC_VIEWER_OUT);
     String webPath = 'web';
  -  String cloudDocumentationPath = join(PACKAGE_STORAGE_ROOT, package.name, version);
  +  String cloudDocumentationPath = _buildCloudStorageDocumentationPath(package, version);
     List<String> args = ['cp', '-e', '-c', '-a', 'public-read', '-r', webPath,
                          cloudDocumentationPath];
   
  
positive.code: 
  final String PACKAGES_DATA_URI = "http://pub.dartlang.org/packages.json";
  final String PACKAGE_STORAGE_ROOT = "gs://dartdocs.org/documentation";
  final String BUILD_DOCUMENTATION_CACHE = "build_documentation_cache";
  final String BUILD_DOCUMENTATION_ROOT_PATH =
  "build_documentation_cache/hosted/pub.dartlang.org";
  
negative.code: //  --metadata_from_file=startup-script:$STARTUP_SCRIPT
  }
  
  Future<PackageBuildInfo> checkPackageIsBuilt(Package package, String version) {
    String docPath = _buildHttpDocumentationPath(package, version);
    // TODO: response / error handling.
    return http.get(docPath).then((response) {
      var data = JSON.decode(response.body);
      PackageBuildInfo packageBuildInfo = new PackageBuildInfo.fromJson(data);
      return packageBuildInfo;
    });
  }
  