Adding some asset-related utilities to code_transformers

pkg/polymer/lib/src/build/linter.dart

 // 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.
 
 /// Logic to validate that developers are correctly using Polymer constructs.
 /// This is mainly used to produce warnings for feedback in the editor.
 library polymer.src.build.linter;
 
 import 'dart:async';
 
 import 'package:barback/barback.dart';
+import 'package:code_transformers/assets.dart';
 import 'package:html5lib/dom.dart';
 import 'package:html5lib/dom_parsing.dart';
 import 'package:source_maps/span.dart';
 
 import 'common.dart';
 import 'utils.dart';
 
 /// A linter that checks for common Polymer errors and produces warnings to
 /// show on the editor or the command line. Leaves sources unchanged, but
 /// creates a new asset containing all the warnings.
@@ skipping 45 matching lines @@
   }
 
   Future<List<AssetId>> _getImportedIds(
       Document document, AssetId sourceId, Transform transform) {
     var importIds = [];
     var logger = transform.logger;
     for (var tag in document.querySelectorAll('link')) {
       if (tag.attributes['rel'] != 'import') continue;
       var href = tag.attributes['href'];
       var span = tag.sourceSpan;
-      var id = resolve(sourceId, href, logger, span);
+      var id = uriToAssetId(sourceId, href, logger, span);
       if (id == null ||
           (id.package == 'polymer' && id.path == 'lib/init.html')) continue;
       importIds.add(assetExists(id, transform).then((exists) {
         if (exists) return id;
         if (sourceId == transform.primaryInput.id) {
           logger.error('couldn\'t find imported asset "${id.path}" in package '
               '"${id.package}".', span: span);
         }
       }));
     }
@@ skipping 327 matching lines @@
     'Make sure the script tag is placed after all HTML imports.';
 
 const String BOOT_JS_DEPRECATED =
     '"boot.js" is now deprecated. Instead, you can initialize your polymer '
     'application by calling "initPolymer()" in your main. If you don\'t have a '
     'main, then you can include our generic main by adding the following '
     'script tag to your page: \'<script type="application/dart">export '
     '"package:polymer/init.dart";</script>\'. Additionally you need to '
     'include: \'<script src="packages/browser/dart.js"></script>\' in the page '
     'too. Make sure these script tags come after all HTML imports.';