| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// Final phase of the polymer transformation: removes any files that are not |
| /// needed for deployment. |
| library polymer.src.build.build_filter; |
| |
| import 'dart:async'; |
| |
| import 'package:barback/barback.dart'; |
| import 'common.dart'; |
| |
| /// Removes any files not needed for deployment, such as internal build |
| /// artifacts and non-entry HTML files. |
| class BuildFilter extends Transformer with PolymerTransformer { |
| final TransformOptions options; |
| BuildFilter(this.options); |
| |
| // TODO(nweiz): This should just take an AssetId when barback <0.13.0 support |
| // is dropped. |
| Future<bool> isPrimary(idOrAsset) { |
| var id = idOrAsset is AssetId ? idOrAsset : idOrAsset.id; |
| return new Future.value( |
| // nothing is filtered in debug mode |
| options.releaseMode && |
| // TODO(sigmund): remove this exclusion once we have dev_transformers |
| // (dartbug.com/14187) |
| id.path.startsWith('web/') && |
| // may filter non-entry HTML files and internal artifacts |
| (id.extension == '.html' || id.extension == '.scriptUrls') && |
| // keep any entry points |
| !options.isHtmlEntryPoint(id)); |
| } |
| |
| Future apply(Transform transform) { |
| if (transform.primaryInput.id.extension == '.scriptUrls') { |
| return new Future.value(null); |
| } |
| return readPrimaryAsHtml(transform).then((document) { |
| // Keep .html files that don't use polymer, since the app developer might |
| // have non-polymer entrypoints. |
| if (document.querySelectorAll('polymer-element').isEmpty) { |
| transform.addOutput(transform.primaryInput); |
| } |
| }); |
| } |
| } |