Support compiling templates in the browser.

lib/dwc_shared.dart

Index: lib/dwc_shared.dart
diff --git a/lib/dwc_shared.dart b/lib/dwc_shared.dart
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+// Copyright (c) 2012, 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.
+
+/**
+ * Shared functionality used by command line and dartium dwc frontends.
+ * Once dart:io dependencies are all abstracted out into
+ * src/tempalte/file_system this file can go away and dwc.dart can be used
+ * by both command line and dartium frontends.
+ */
+library dwc_shared;
+
+import 'package:args/args.dart';
+import 'src/template/cmd_options.dart';
+import 'src/template/file_system.dart';
+import 'src/template/file_system_memory.dart';
+import 'src/template/world.dart';
+
+ArgParser commandOptions() {
+  return new ArgParser()
+    ..addFlag('verbose', help: 'Display detail info', defaultsTo: false)
+    ..addFlag('clean', help: 'Remove all generated files', defaultsTo: false)
+    ..addFlag('dump', help: 'Dump AST', defaultsTo: false)
+    ..addFlag('suppress_warnings', help: 'Warnings not displayed',
+        defaultsTo: true)
+    ..addFlag('warnings_as_errors', help: 'Warning handled as errors',
+        defaultsTo: false)
+    ..addFlag('throw_on_errors', help: 'Throw on errors encountered',
+        defaultsTo: false)
+    ..addFlag('throw_on_warnings', help: 'Throw on warnings encountered',
+        defaultsTo: false)
+    ..addFlag('no_colors', help: 'Display errors/warnings in colored text',
+        defaultsTo: true)
+    ..addFlag('help', help: 'Displays this help message', defaultsTo: false);
+}
+
+void initHtmlWorld(CmdOptions opts) {
+  var fs = new MemoryFileSystem();
+  initializeWorld(fs, opts);
+
+  // TODO(terry): Should be set by arguments.  When run as a tool these aren't
+  // set when run internaly set these so we can compile CSS and catch any
+  // problems programmatically.
+  //  options.throwOnErrors = true;
+  //  options.throwOnFatal = true;
+  //  options.useColors = commandLine ? true : false;
+}