Practically remove boot.js, adds the initialization from the Dart side of

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;
 
@@ skipping 29 matching lines @@
 
   Future apply(Transform transform) {
     var wrapper = new _LoggerInterceptor(transform, _formatter);
     var seen = new Set<AssetId>();
     var primary = transform.primaryInput;
     var id = primary.id;
     wrapper.addOutput(primary); // this phase is analysis only
     seen.add(id);
     return readPrimaryAsHtml(wrapper).then((document) {
       return _collectElements(document, id, wrapper, seen).then((elements) {
-        new _LinterVisitor(wrapper, elements).visit(document);
+        bool isEntrypoint = options.isHtmlEntryPoint(id);
+        new _LinterVisitor(wrapper, elements, isEntrypoint).run(document);
         var messagesId = id.addExtension('.messages');
         wrapper.addOutput(new Asset.fromString(messagesId,
             wrapper._messages.join('\n')));
       });
     });
   }
 
   /**
    * Collect into [elements] any data about each polymer-element defined in
    * [document] or any of it's imports, unless they have already been [seen].
@@ skipping 22 matching lines @@
 
   Future<List<AssetId>> _getImportedIds(
       Document document, AssetId sourceId, Tranform transform) {
     var importIds = [];
     var logger = transform.logger;
     for (var tag in document.queryAll('link')) {
       if (tag.attributes['rel'] != 'import') continue;
       var href = tag.attributes['href'];
       var span = tag.sourceSpan;
       var id = resolve(sourceId, href, logger, span);
-      if (id == null) continue;
+      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);
         }
       }));
     }
     return Future.wait(importIds);
   }
@@ skipping 107 matching lines @@
       ? extendsTag : extendsType.baseExtendsTag;
 
   _ElementSummary(this.tagName, this.extendsTag, this.span);
 
   String toString() => "($tagName <: $extendsTag)";
 }
 
 class _LinterVisitor extends TreeVisitor {
   TransformLogger _logger;
   bool _inPolymerElement = false;
+  bool _dartJSSeen = false;
+  bool _initSeen = false;
+  bool _isEntrypoint;
   Map<String, _ElementSummary> _elements;
 
-  _LinterVisitor(this._logger, this._elements) {
+  _LinterVisitor(this._logger, this._elements, this._isEntrypoint) {
     // We normalize the map, so each element has a direct reference to any
     // element it extends from.
     for (var tag in _elements.values) {
       var extendsTag = tag.extendsTag;
       if (extendsTag == null) continue;
       tag.extendsType = _elements[extendsTag];
     }
   }
 
   void visitElement(Element node) {
     switch (node.tagName) {
       case 'link': _validateLinkElement(node); break;
       case 'element': _validateElementElement(node); break;
       case 'polymer-element': _validatePolymerElement(node); break;
       case 'script': _validateScriptElement(node); break;
       default:
          _validateNormalElement(node);
          super.visitElement(node);
          break;
     }
   }
 
+  void run(Document doc) {
+    visit(doc);
+
+    if (_isEntrypoint && !_initSeen) {
+      _logger.error(USE_INIT_DART, span: doc.body.sourceSpan);
+    } 
+
+    if (_isEntrypoint && !_dartJSSeen) {
+      // TODO(sigmund): remove this when webkitStartDart is gone.
+      _logger.error(USE_DART_JS, span: doc.body.sourceSpan);
+    }
+  }
+
   /** Produce warnings for invalid link-rel tags. */
   void _validateLinkElement(Element node) {
     var rel = node.attributes['rel'];
     if (rel != 'import' && rel != 'stylesheet') return;
 
+    if (rel == 'import' && _initSeen) {
+      _logger.warning(
+          "Move HTML imports above the 'polymer/init.dart' script tag",
+          span: node.sourceSpan);
+    }
+
     var href = node.attributes['href'];
     if (href != null && href != '') return;
 
     // TODO(sigmund): warn also if href can't be resolved.
     _logger.warning('link rel="$rel" missing href.', span: node.sourceSpan);
   }
 
   /** Produce warnings if using `<element>` instead of `<polymer-element>`. */
   void _validateElementElement(Element node) {
     _logger.warning('<element> elements are not supported, use'
@@ skipping 72 matching lines @@
         // that the code is indeed using Dart.
         _logger.warning('script tag in polymer element with no type will '
             'be treated as JavaScript. Did you forget type="application/dart"?',
             span: node.sourceSpan);
       }
       if (src != null && src.endsWith('.dart')) {
         _logger.warning('script tag with .dart source file but no type will '
             'be treated as JavaScript. Did you forget type="application/dart"?',
             span: node.sourceSpan);
       }
+    }
+
+    if (src == null) return;
+
+    if (src == 'packages/polymer/boot.js') {
+      _logger.warning(BOOT_JS_DEPRECATED, span: node.sourceSpan);
+      return;
+    }
+    if (src == 'packages/browser/dart.js' ||
+        src == 'packages/unittest/test_controller.js') {
+      _dartJSSeen = true;
+      return;
+    }
+
+    if (src == 'packages/polymer/init.dart') {
+      _initSeen = true;
+      if (scriptType == null) {
+        _logger.warning('script tag missing type="application/dart".',

[Jennifer Messerly, 2013/10/17 02:04:35]

not a big deal either way, but these 2 messages could be consolidated

[Siggi Cherem (dart-lang), 2013/10/17 02:37:40]

Done.

+            span: node.sourceSpan);
+      } else if (scriptType != 'application/dart') {
+        _logger.warning('wrong script type, expected type="application/dart".',
+            span: node.sourceSpan);
+      }
       return;
     }
 
     if (scriptType != 'application/dart') return;
 
-    if (src != null) {
-      if (!src.endsWith('.dart')) {
-        _logger.warning('"application/dart" scripts should '
-            'use the .dart file extension.',
-            span: node.sourceSpan);
-      }
+    if (!src.endsWith('.dart')) {
+      _logger.warning('"application/dart" scripts should '
+          'use the .dart file extension.',
+          span: node.sourceSpan);
+    }
 
-      if (node.innerHtml.trim() != '') {
-        _logger.warning('script tag has "src" attribute and also has script '
-            'text.', span: node.sourceSpan);
-      }
+    if (node.innerHtml.trim() != '') {
+      _logger.warning('script tag has "src" attribute and also has script '
+          'text.', span: node.sourceSpan);
     }
   }
 
   /**
    * Produces warnings for misuses of on-foo event handlers, and for instanting
    * custom tags incorrectly.
    */
   void _validateNormalElement(Element node) {
     // Event handlers only allowed inside polymer-elements
     node.attributes.forEach((name, value) {
@@ skipping 121 matching lines @@
 
 /**
  * Returns true if this is a valid custom element name. See:
  * <https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/custom/index.html#dfn-custom-element-name>
  */
 bool _isCustomTag(String name) {
   if (name == null || !name.contains('-')) return false;
   return !_invalidTagNames.containsKey(name);
 }
 
-final String _RED_COLOR = '\u001b[31m';
-final String _MAGENTA_COLOR = '\u001b[35m';
-final String _NO_COLOR = '\u001b[0m';
+const String _RED_COLOR = '\u001b[31m';
+const String _MAGENTA_COLOR = '\u001b[35m';
+const String _NO_COLOR = '\u001b[0m';
+
+const String USE_INIT_DART = 
+    'To run a polymer applications, make sure to include '
+    '\'<script type="application/dart" src="packages/polymer/init.dart">'
+    '</script>\' in your page, after all HTML imports.';
+
+const String USE_DART_JS =
+    'To run a polymer applications in Dartium, make sure to include'
+    '\'<script src="packages/browser/dart.js"></script>\' in your page';
+
+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" '
+    'src="packages/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.';