Bring back initPolymer, allow boot.js only if using "polymer_experimental.html".

pkg/polymer/lib/src/build/script_compactor.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 that combines multiple dart script tags into a single one.
 library polymer.src.build.script_compactor;
 
 import 'dart:async';
 import 'dart:convert';
 
@@ skipping 56 matching lines @@
   final AssetId docId;
   final AssetId bootstrapId;
 
   /// HTML document parsed from [docId].
   Document document;
 
   /// List of ids for each Dart entry script tag (the main tag and any tag
   /// included on each custom element definition).
   List<AssetId> entryLibraries;
 
+  /// Whether we are using the experimental bootstrap logic.
+  bool experimentalBootstrap;
+
   /// Initializers that will register custom tags or invoke `initMethod`s.
   final List<_Initializer> initializers = [];
 
   /// Attributes published on a custom-tag. We make these available via
   /// reflection even if @published was not used.
   final Map<String, List<String>> publishedAttributes = {};
 
   /// Hook needed to access the analyzer within barback transformers.
   final Resolvers resolvers;
 
@@ skipping 17 matching lines @@
       .then(_loadEntryLibraries)
       .then(_processHtml)
       .then(_emitNewEntrypoint);
 
   /// Loads the primary input as an html document.
   Future _loadDocument() =>
       readPrimaryAsHtml(transform).then((doc) { document = doc; });
 
   /// Populates [entryLibraries] as a list containing the asset ids of each
   /// library loaded on a script tag. The actual work of computing this is done
-  /// in an earlier phase and emited in the `entrypoint.scriptUrls` asset.
+  /// in an earlier phase and emited in the `entrypoint._data` asset.
   Future _loadEntryLibraries(_) =>
-      transform.readInputAsString(docId.addExtension('.scriptUrls'))
-          .then((libraryIds) {
-        entryLibraries = (JSON.decode(libraryIds) as Iterable)
-            .map((data) => new AssetId.deserialize(data)).toList();
+      transform.readInputAsString(docId.addExtension('._data')).then((data) {
+        var map = JSON.decode(data);
+        experimentalBootstrap = map['experimental_bootstrap'];
+        entryLibraries = map['script_ids']
+              .map((id) => new AssetId.deserialize(id))
+              .toList();
       });
 
   /// Removes unnecessary script tags, and identifies the main entry point Dart
   /// script tag (if any).
   void _processHtml(_) {
     for (var tag in document.querySelectorAll('script')) {
       var src = tag.attributes['src'];
       if (src == 'packages/polymer/boot.js') {
         tag.remove();
         continue;
       }
-      if (tag.attributes['type'] == 'application/dart;component=1') {
+      if (tag.attributes['type'] == 'application/dart') {
         logger.warning('unexpected script. The '
           'ScriptCompactor transformer should run after running the '
           'ImportInliner', span: tag.sourceSpan);
       }
     }
   }
 
   /// Emits the main HTML and Dart bootstrap code for the application. If there
   /// were not Dart entry point files, then this simply emits the original HTML.
   Future _emitNewEntrypoint(_) {
@@ skipping 201 matching lines @@
       code.writeln("import '$url' as i$i;");
       prefixes[id] = 'i$i';
       i++;
     }
 
     // Include smoke initialization.
     generator.writeImports(code);
     generator.writeTopLevelDeclarations(code);
     code.writeln('\nvoid main() {');
     generator.writeInitCall(code);
-    code.write('  startPolymer([');
+    if (experimentalBootstrap) {
+      code.write('  startPolymer([');
+    } else {
+      code.write('  configureForDeployment([');
+    }
 
     // Include initializers to switch from mirrors_loader to static_loader.
     if (!initializers.isEmpty) {
       code.writeln();
       for (var init in initializers) {
         var initCode = init.asCode(prefixes[init.assetId]);
         code.write("      $initCode,\n");
       }
       code.writeln('    ]);');
     } else {
-      logger.warning(NO_INITIALIZERS_ERROR);
+      if (experimentalBootstrap) logger.warning(NO_INITIALIZERS_ERROR);
       code.writeln(']);');
     }
+    if (!experimentalBootstrap) {
+      code.writeln('  i${entryLibraries.length - 1}.main();');
+    }
     code.writeln('}');
     transform.addOutput(new Asset.fromString(bootstrapId, code.toString()));
 
 
     // Emit the bootstrap .dart file
     var srcUrl = path.url.basename(bootstrapId.path);
     document.body.nodes.add(parseFragment(
           '<script type="application/dart" src="$srcUrl"></script>'));
     transform.addOutput(new Asset.fromString(docId, document.outerHtml));
   }
@@ skipping 330 matching lines @@
   for (var c in combinators) {
     if (c is ShowElementCombinator) {
       var show = c.shownNames.toSet();
       elements.retainWhere((e) => show.contains(e.displayName));
     } else if (c is HideElementCombinator) {
       var hide = c.hiddenNames.toSet();
       elements.removeWhere((e) => hide.contains(e.displayName));
     }
   }
 }