fixes #276, path manipulation issues on windows. Also fixes server mode

lib/src/compiler.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 dev_compiler.src.compiler;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:math' as math;
@@ skipping 16 matching lines @@
 
 import 'package:dev_compiler/strong_mode.dart' show StrongModeOptions;
 
 import 'analysis_context.dart';
 import 'checker/checker.dart';
 import 'checker/rules.dart';
 import 'codegen/html_codegen.dart' as html_codegen;
 import 'codegen/js_codegen.dart';
 import 'info.dart'
     show AnalyzerMessage, CheckerResults, LibraryInfo, LibraryUnit;
-import 'server/server.dart' show DevServer;
 import 'options.dart';
 import 'report.dart';
 
 /// Sets up the type checker logger to print a span that highlights error
 /// messages.
 StreamSubscription setupLogger(Level level, printFn) {
   Logger.root.level = level;
   return Logger.root.onRecord.listen((LogRecord rec) {
     printFn('${rec.level.name.toLowerCase()}: ${rec.message}');
   });
 }
 
 CompilerOptions validateOptions(List<String> args, {bool forceOutDir: false}) {
   var options = parseOptions(args, forceOutDir: forceOutDir);
   if (!options.help) {
     var srcOpts = options.sourceOptions;
     if (!srcOpts.useMockSdk && srcOpts.dartSdkPath == null) {
       print('Could not automatically find dart sdk path.');
       print('Please pass in explicitly: --dart-sdk <path>');
       exit(1);
     }
     if (options.inputs.length == 0) {
       print('Expected filename.');
       return null;
     }
   }
   return options;
 }
 
-Future<bool> compile(CompilerOptions options) async {
-  setupLogger(options.logLevel, print);
-
-  if (options.serverMode) {
-    return new DevServer(options).start();
-  } else {
-    var context = createAnalysisContextWithSources(
-        options.strongOptions, options.sourceOptions);
-    var reporter = createErrorReporter(context, options);
-    // Note: run returns a bool, turned into a future since this function is async.
-    return new BatchCompiler(context, options, reporter: reporter).run();
-  }
+bool compile(CompilerOptions options) {
+  assert(!options.serverMode);
+  var context = createAnalysisContextWithSources(
+      options.strongOptions, options.sourceOptions);
+  var reporter = createErrorReporter(context, options);
+  return new BatchCompiler(context, options, reporter: reporter).run();
 }
 
 class BatchCompiler extends AbstractCompiler {
   JSGenerator _jsGen;
   LibraryElement _dartCore;
   String _runtimeOutputDir;
 
   /// Already compiled sources, so we don't compile them again.
   final _compiled = new HashSet<LibraryElement>();
 
@@ skipping 357 matching lines @@
     '_rtti.js',
     '_classes.js',
     '_operations.js',
     'dart_runtime.js',
   ];
   files.addAll(corelibOrder.map((l) => l.replaceAll('.', '/') + '.js'));
   return files;
 }();
 
 final _log = new Logger('dev_compiler.src.compiler');