fixes #219, able to compile multiple entry points

lib/src/codegen/html_codegen.dart

 // Copyright (c) 2015, 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.
 
 library dev_compiler.src.codegen.html_codegen;
 
 import 'package:html/dom.dart';
 import 'package:html/parser.dart' show parseFragment;
 import 'package:logging/logging.dart' show Logger;
 import 'package:path/path.dart' as path;
 
-import 'package:dev_compiler/src/dependency_graph.dart';
-import 'package:dev_compiler/src/options.dart';
+import 'package:dev_compiler/src/compiler.dart' show AbstractCompiler;
+import 'package:dev_compiler/src/server/dependency_graph.dart';
 import 'package:dev_compiler/src/utils.dart' show colorOf, resourceOutputPath;
 
-import 'js_codegen.dart' show jsOutputPath, jsOutputBase;
-
 /// Emits an entry point HTML file corresponding to [inputFile] that can load
 /// the code generated by the dev compiler.
 ///
 /// This internally transforms the given HTML [document]. When compiling to
 /// JavaScript, we remove any Dart script tags, add new script tags to load our
 /// runtime and the compiled code, and to execute the main method of the
 /// application. When compiling to Dart, we ensure that the document contains a
 /// single Dart script tag, but otherwise emit the original document
 /// unmodified.
-String generateEntryHtml(HtmlSourceNode root, CompilerOptions options) {
+String generateEntryHtml(HtmlSourceNode root, AbstractCompiler compiler) {
+  var options = compiler.options;
   var document = root.document.clone(true);
   var scripts = document.querySelectorAll('script[type="application/dart"]');
   if (scripts.isEmpty) {
     _log.warning('No <script type="application/dart"> found in ${root.uri}');
     return '${document.outerHtml}\n';
   }
   scripts.skip(1).forEach((s) {
     // TODO(sigmund): allow more than one Dart script tags?
     _log.warning(s.sourceSpan.message(
         'unexpected script. Only one Dart script tag allowed '
@@ skipping 28 matching lines @@
 
   var fragment = new DocumentFragment();
   for (var resource in resources) {
     var resourcePath =
         resourceOutputPath(resource.uri, root.uri, options.runtimeDir);
     var ext = path.extension(resourcePath);
     if (resource.cachingHash != null) {
       resourcePath = _addHash(resourcePath, resource.cachingHash);
     }
     if (ext == '.js') {
-      fragment.nodes.add(_libraryInclude(resourcePath));
+      fragment.nodes.add(libraryInclude(resourcePath));
     } else if (ext == '.css') {
       var stylesheetLink = '<link rel="stylesheet" href="$resourcePath">\n';
       fragment.nodes.add(parseFragment(stylesheetLink));
     }
   }
 
   String mainLibraryName;
   for (var lib in libraries) {
     var info = lib.info;
     if (info == null) continue;
-    var jsPath = jsOutputPath(info.library, root.uri);
-    if (info.isEntry) mainLibraryName = jsOutputBase(info.library, root.uri);
+    var uri = info.library.source.uri;
+    var jsPath = compiler.getModulePath(uri);
+    if (info.isEntry) mainLibraryName = compiler.getModuleName(uri);
     if (lib.cachingHash != null) {
       jsPath = _addHash(jsPath, lib.cachingHash);
     }
-    fragment.nodes.add(_libraryInclude(jsPath));
+    fragment.nodes.add(libraryInclude(jsPath));
   }
-  fragment.nodes.add(_invokeMain(mainLibraryName));
+  fragment.nodes.add(invokeMain(mainLibraryName));
   scripts[0].replaceWith(fragment);
   return '${document.outerHtml}\n';
 }
 
+// TODO(jmesserly): the string interpolation in these could lead to injection
+// bugs. Not really a security issue since input is trusted, but the resulting
+// parse tree may not match expectations if interpolated strings contain quotes.
+
 /// A script tag that loads the .js code for a compiled library.
-Node _libraryInclude(String jsUrl) =>
+Node libraryInclude(String jsUrl) =>
     parseFragment('<script src="$jsUrl"></script>\n');
 
 /// A script tag that invokes the main function on the entry point library.
-Node _invokeMain(String mainLibraryName) {
+Node invokeMain(String mainLibraryName) {
   var code = mainLibraryName == null
       ? 'console.error("dev_compiler error: main was not generated");'
       // TODO(vsm): Can we simplify this?
       // See: https://github.com/dart-lang/dev_compiler/issues/164
       : "dart_library.start('$mainLibraryName');";
   return parseFragment('<script>$code</script>\n');
 }
 
 /// Convert the outputPath to include the hash in it. This function is the
 /// reverse of what the server does to determine whether a request needs to have
 /// cache headers added to it.
 _addHash(String outPath, String hash) {
   // (the ____ prefix makes it look better in the web inspector)
   return '$outPath?____cached=$hash';
 }
 
 final _log = new Logger('dev_compiler.src.codegen.html_codegen');