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packages/polymer/lib/src/build/build_log_combiner.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 combine all the ._buildLog.* logs into one ._buildLog file.
 library polymer.src.build.log_combiner;
 
 import 'dart:async';
 
 import 'package:barback/barback.dart';
@@ skipping 13 matching lines @@
     if (!options.injectBuildLogsInOutput) return false;
     var id = idOrAsset is AssetId ? idOrAsset : idOrAsset.id;
     return options.isHtmlEntryPoint(id);
   }
 
   Future apply(Transform transform) {
     // Combine all ._buildLogs* files into one ._buildLogs file.
     return BuildLogger.combineLogFiles(transform);
   }
 }