Initial support for generating client and server stubs for Dart.

lib/file_generator.dart

Index: lib/file_generator.dart
diff --git a/lib/file_generator.dart b/lib/file_generator.dart
index a53c46fd24571ca9ebd7752494bba1b5ff130f63..19e5faa59291437254795b7748b6e4e1b896c71f 100644
--- a/lib/file_generator.dart
+++ b/lib/file_generator.dart
@@ -25,6 +25,8 @@ class FileGenerator extends ProtobufContainer {
   final List<EnumGenerator> enumGenerators = <EnumGenerator>[];
   final List<MessageGenerator> messageGenerators = <MessageGenerator>[];
   final List<ExtensionGenerator> extensionGenerators = <ExtensionGenerator>[];
+  final List<ClientApiGenerator> clientApiGenerators = <ClientApiGenerator>[];
+  final List<ServiceGenerator> serviceGenerators = <ServiceGenerator>[];
 
   FileGenerator(this._fileDescriptor, this._parent, this._context) {
     _context.register(this);
@@ -43,6 +45,10 @@ class FileGenerator extends ProtobufContainer {
       extensionGenerators.add(
           new ExtensionGenerator(extension, this, _context));
     }
+    for (ServiceDescriptorProto service in _fileDescriptor.service) {
+      serviceGenerators.add(new ServiceGenerator(service, this, _context));
+      clientApiGenerators.add(new ClientApiGenerator(service, this, _context));
+    }
   }
 
   String get package => _fileDescriptor.package;
@@ -93,6 +99,8 @@ class FileGenerator extends ProtobufContainer {
       '///\n'
       'library $libraryName;\n'
       '\n'
+      'import \'dart:async\';\n'

[Søren Gjesse, 2015/06/23 12:08:31]

Is there any way to only import this if needed?

We already have the problem with the two package imports below causing warnings
when not used.

[wibling, 2015/06/23 13:26:34]

I will take a look and see what I can come up with.

+      '\n'
       "import 'package:fixnum/fixnum.dart';\n"
       "import 'package:protobuf/protobuf.dart';"
     );
@@ -151,6 +159,13 @@ class FileGenerator extends ProtobufContainer {
         out.println('}');
       });
     }
+
+    for (ClientApiGenerator c in clientApiGenerators) {
+      c.generate(out);
+    }
+    for (ServiceGenerator s in serviceGenerators) {
+      s.generate(out);
+    }
   }
 
   bool get needsMapMixinImport {