Initial cut for a development server

bin/devc.dart

 #!/usr/bin/env 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.
 
 /// Command line tool to run the checker on a Dart program.
 library ddc.bin.checker;
 
 import 'dart:io';
 
 import 'package:dev_compiler/devc.dart';
-import 'package:dev_compiler/src/checker/dart_sdk.dart' show mockSdkSources;
-import 'package:dev_compiler/src/checker/resolver.dart' show TypeResolver;
 import 'package:dev_compiler/src/options.dart';
 
 void _showUsageAndExit() {
   print('usage: dartdevc [<options>] <file.dart>\n');
   print('<file.dart> is a single Dart file to process.\n');
   print('<options> include:\n');
   print(argParser.usage);
   exit(1);
 }
 
 void main(List<String> args) {
   var options = parseOptions(args);
   if (options.help) _showUsageAndExit();
 
   if (!options.useMockSdk && options.dartSdkPath == null) {
     print('Could not automatically find dart sdk path.');
     print('Please pass in explicitly: --dart-sdk <path>');
     exit(1);
   }
 
   if (options.entryPointFile == null) {
     print('Expected filename.');
     _showUsageAndExit();
   }
 
   if (!options.dumpInfo) setupLogger(options.logLevel, print);
 
-  var typeResolver = options.useMockSdk
-      ? new TypeResolver.fromMock(mockSdkSources, options)
-      : new TypeResolver.fromDir(options.dartSdkPath, options);
-  var result = compile(options.entryPointFile, typeResolver, options);
-  exit(result.failure ? 1 : 0);
+  if (options.serverMode) {
+    new CompilerServer(options).start();
+  } else {
+    var result = new Compiler(options).run();
+    exit(result.failure ? 1 : 0);
+  }
 }