Configure polymer transformers based on whether pub is running the build or

pkg/polymer/lib/transformer.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.
 
 /** Transfomer used for pub-serve and pub-deploy. */
 library polymer.transformer;
 
 import 'package:barback/barback.dart';
 import 'package:observe/transform.dart';
 import 'src/build/code_extractor.dart';
@@ skipping 17 matching lines @@
   final Iterable<Iterable> phases;
 
   PolymerTransformerGroup(TransformOptions options)
       : phases = _createDeployPhases(options);
 
   PolymerTransformerGroup.asPlugin(BarbackSettings settings)
       : this(_parseSettings(settings));
 }
 
 TransformOptions _parseSettings(BarbackSettings settings) {
-  var args = settings.transformer;
+  var args = settings.configuration;
+  bool release = settings.mode == BarbackMode.RELEASE;
+  bool jsOption = args['js'];
+  bool csp = args['csp'] == true; // defaults to false
   return new TransformOptions(
       entryPoints: _readEntrypoints(args['entry_points']),
-      directlyIncludeJS: args['js'] != false, // default to true
-      contentSecurityPolicy: args['csp'] == true); // default to false
+      directlyIncludeJS: jsOption == null ? release : jsOption,
+      contentSecurityPolicy: csp);
 }
 
 _readEntrypoints(value) {
   if (value == null) return null;
   var entryPoints = [];
   bool error;
   if (value is List) {
     entryPoints = value;
     error = value.any((e) => e is! String);
   } else if (value is String) {
@@ skipping 10 matching lines @@
 
 List<List<Transformer>> _createDeployPhases(TransformOptions options) {
   return [
     [new InlineCodeExtractor(options)],
     [new ObservableTransformer()],
     [new ImportInliner(options)],
     [new ScriptCompactor(options)],
     [new PolyfillInjector(options)]
   ];
 }