Polymer transformer logs now show on the frontend for pub serve.

pkg/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';
+import 'package:html5lib/parser.dart' show parseFragment;
+
+import 'common.dart';
+import 'wrapped_logger.dart';
+
+/// Logic to combine all the ._buildLog.* logs into one ._buildLog file.
+class BuildLogCombiner extends Transformer with PolymerTransformer {
+  final TransformOptions options;
+
+  BuildLogCombiner(this.options);
+
+  // Run only on entry point html files in !releaseMode.
+  bool isPrimary(idOrAsset) {
+    if (options.releaseMode) 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 WrappedLogger.combineLogFiles(transform).then((_) {
+      // Inject the stylesheet for the logger widget.
+      return readPrimaryAsHtml(transform).then((document) {
+        document.body.append(parseFragment(

[Siggi Cherem (dart-lang), 2014/08/04 20:38:37]

body => head

[jakemac, 2014/08/04 22:21:57]

Done.

+            '<link rel="stylesheet" type="text/css"'
+                'href="packages/polymer/src/build/log_injector.css">'));
+        transform.addOutput(new Asset.fromString(
+            transform.primaryInput.id, document.outerHtml));
+      });
+    });
+  }
+}