Make deferred loading of message libraries optional

pkg/intl/lib/generate_localized.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.
 
 /**
  * This provides utilities for generating localized versions of
  * messages. It does not stand alone, but expects to be given
  * TranslatedMessage objects and generate code for a particular locale
  * based on them.
  *
@@ skipping 35 matching lines @@
  */
 List<String> allLocales = [];
 
 /**
  * If we have more than one set of messages to generate in a particular
  * directory we may want to prefix some to distinguish them.
  */
 String generatedFilePrefix = '';
 
 /**
+ * Should we use deferred loading for the generated libraries.
+ */
+bool useDeferredLoading = true;
+
+/**
  * This represents a message and its translation. We assume that the translation
  * has some identifier that allows us to figure out the original message it
  * corresponds to, and that it may want to transform the translated text in
  * some way, e.g. to turn whatever format the translation uses for variables
  * into a Dart string interpolation. Specific translation
  * mechanisms are expected to subclass this.
  */
 abstract class TranslatedMessage {
   /**
    * The identifier for this message. In the simplest case, this is the name
@@ skipping 106 matching lines @@
 /**
  * This section generates the messages_all.dart file based on the list of
  * [allLocales].
  */
 String generateMainImportFile() {
   var output = new StringBuffer();
   output.write(mainPrologue);
   for (var locale in allLocales) {
     var baseFile = '${generatedFilePrefix}messages_$locale.dart';
     var file = importForGeneratedFile(baseFile);
-    output.write("import '$file' deferred as ${_libraryName(locale)};\n");
+    output.write("import '$file' ");
+    if (useDeferredLoading) output.write("deferred ");
+    output.write("as ${_libraryName(locale)};\n");
   }
   output.write("\n");
   output.write("\nMap<String, Function> _deferredLibraries = {\n");
   for (var rawLocale in allLocales) {
     var locale = Intl.canonicalizedLocale(rawLocale);
-    output.write("  '$locale' : () => ${_libraryName(locale)}.loadLibrary(),\n");
+    var loadOperation = (useDeferredLoading) 
+        ? "  '$locale' : () => ${_libraryName(locale)}.loadLibrary(),\n"
+        : "  '$locale' : () => new Future.value(null),\n";
+    output.write(loadOperation);
   }
   output.write("};\n");
   output.write(
     "\nMessageLookupByLibrary _findExact(localeName) {\n"
     "  switch (localeName) {\n");
   for (var rawLocale in allLocales) {
     var locale = Intl.canonicalizedLocale(rawLocale);
     output.write(
         "    case '$locale' : return ${_libraryName(locale)}.messages;\n");
   }
@@ skipping 38 matching lines @@
       messageLookup.addLocale(localeName, _findGeneratedMessagesFor));
 }
 
 MessageLookupByLibrary _findGeneratedMessagesFor(locale) {
   var actualLocale = Intl.verifiedLocale(locale, (x) => _findExact(x) != null,
       onFailure: (_) => null);
   if (actualLocale == null) return null;
   return _findExact(actualLocale);
 }
 """;