Basic dart^2 analyzer tests running.

pkg/analyzer_experimental/lib/options.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.
 
 library options;
 
 import 'package:args/args.dart';
 
 import 'dart:io';
 
@@ skipping 92 matching lines @@
           defaultsTo: false, negatable: false)
       ..addFlag('show-package-warnings',
           help: 'Show warnings from package: imports',
           defaultsTo: false, negatable: false)
       ..addFlag('show-sdk-warnings', help: 'Show warnings from SDK imports',
           defaultsTo: false, negatable: false)
       ..addFlag('help', abbr: 'h', help: 'Display this help message',
           defaultsTo: false, negatable: false);
 
     try {
+      // TODO(scheglov) https://code.google.com/p/dart/issues/detail?id=11061
+      args = args.map((String arg) => arg == '-batch' ? '--batch' : arg).toList();
       var results = parser.parse(args);
       // help requests
       if (results['help']) {
         _showUsage(parser);
         exit(0);
       }
       // batch mode and input files
       if (results['batch']) {
-        if (results.rest.length != 0) {
+        if (results.rest.isNotEmpty) {
           print('No source files expected in the batch mode.');
           _showUsage(parser);
           exit(15);
         }
-      } if (results['version']) {
+      } else if (results['version']) {
         print('$_BINARY_NAME version ${_getVersion()}');
         exit(0);
       } else {
-        if (results.rest.length == 0) {
+        if (results.rest.isEmpty) {
           _showUsage(parser);
           exit(15);
         }
       }
       return new CommandLineOptions._fromArgs(results);
     } on FormatException catch (e) {
       print(e.message);
       _showUsage(parser);
       exit(15);
     }
 
   }
 
   static _showUsage(parser) {
     print('Usage: $_BINARY_NAME [options...] <libraries to analyze...>');
     print(parser.getUsage());
     print('');
     print('For more information, see http://www.dartlang.org/tools/analyzer.');
   }
 
   static String _getVersion() {
     try {
       Path path = new Path(new Options().script);
       Path versionPath = path.directoryPath.append('..').append('version');
       File versionFile = new File.fromPath(versionPath);
-      
       return versionFile.readAsStringSync().trim();
     } catch (_) {
       // This happens when the script is not running in the context of an SDK.
       return "<unknown>";
     }
   }
 }
 
 /**
  * Commandline argument parser.
@@ skipping 85 matching lines @@
 
   _getNextFlagIndex(args, i) {
     for ( ; i < args.length; ++i) {
       if (args[i].startsWith('--')) {
         return i;
       }
     }
     return i;
   }
 }