Support for --perf in analyzer_experimental.

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 'package:path/path.dart';
 
 import 'dart:io';
@@ skipping 11 matching lines @@
 
   /** Whether to use machine format for error display */
   final bool machineFormat;
 
   /** Whether to display version information */
   final bool displayVersion;
 
   /** Whether to ignore unrecognized flags */
   final bool ignoreUnrecognizedFlags;
 
+  /** Whether to show performance statistics */
+  final bool perf;
+
   /** Whether to show package: warnings */
   final bool showPackageWarnings;
 
   /** Whether to show SDK warnings */
   final bool showSdkWarnings;
 
   /** Whether to treat warnings as fatal */
   final bool warningsAreFatal;
 
   /** The path to the dart SDK */
   final String dartSdkPath;
 
   /** The path to the package root */
   final String packageRootPath;
 
   /** The source files to analyze */
   final List<String> sourceFiles;
 
   /**
    * Initialize options from the given parsed [args].
    */
   CommandLineOptions._fromArgs(ArgResults args)
     : shouldBatch = args['batch'],
       machineFormat = args['machine'],
       displayVersion = args['version'],
       ignoreUnrecognizedFlags = args['ignore-unrecognized-flags'],
+      perf = args['perf'],
       showPackageWarnings = args['show-package-warnings'],
       showSdkWarnings = args['show-sdk-warnings'],
       warningsAreFatal = args['fatal-warnings'],
       dartSdkPath = args['dart-sdk'],
       packageRootPath = args['package-root'],
       sourceFiles = args.rest;
 
   /**
    * Parse [args] into [CommandLineOptions] describing the specified
    * analyzer options. In case of a format error, prints error and exists.
@@ skipping 31 matching lines @@
       ..addFlag('version', help: 'Print the analyzer version',
           defaultsTo: false, negatable: false)
       ..addFlag('ignore-unrecognized-flags',
           help: 'Ignore unrecognized command line flags',
           defaultsTo: false, negatable: false)
       ..addFlag('fatal-warnings', help: 'Treat non-type warnings as fatal',
           defaultsTo: false, negatable: false)
       ..addFlag('show-package-warnings',
           help: 'Show warnings from package: imports',
           defaultsTo: false, negatable: false)
+      ..addFlag('perf',
+          help: 'Show performance statistics',
+          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
@@ skipping 137 matching lines @@
 
   _getNextFlagIndex(args, i) {
     for ( ; i < args.length; ++i) {
       if (args[i].startsWith('--')) {
         return i;
       }
     }
     return i;
   }
 }