Issue 10871. Fix for analyzing file without absolute path

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 19 matching lines @@
 
   /** 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_format'],
-      ignoreUnrecognizedFlags = args['ignore_unrecognized_flags'],
-      showPackageWarnings = args['show_package_warnings'],
-      showSdkWarnings = args['show_sdk_warnings'],
-      warningsAreFatal = args['fatal_warnings'],
-      dartSdkPath = args['dart_sdk'],
+      machineFormat = args['machine-format'],
+      ignoreUnrecognizedFlags = args['ignore-unrecognized-flags'],
+      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.
    */
   static CommandLineOptions parse(List<String> args) {
     CommandLineOptions options = _parse(args);
     // check SDK
     {
@@ skipping 10 matching lines @@
       }
     }
     // OK
     return options;
   }
 
   static CommandLineOptions _parse(List<String> args) {
     var parser = new _CommandLineParser()
       ..addFlag('batch', abbr: 'b', help: 'Run in batch mode',
           defaultsTo: false, negatable: false)
-      ..addOption('dart_sdk', help: 'Specify path to the Dart sdk')
-      ..addFlag('machine_format', help: 'Specify whether errors '
+      ..addOption('dart-sdk', help: 'The path to the Dart SDK')
+      ..addOption('package-root', help: 'The path to the package root')
+      ..addFlag('machine-format', help: 'Specify whether errors '
         'should be in machine format',
           defaultsTo: false, negatable: false)
-      ..addFlag('ignore_unrecognized_flags',
+      ..addFlag('ignore-unrecognized-flags',
           help: 'Ignore unrecognized command line flags',
           defaultsTo: false, negatable: false)
-      ..addFlag('fatal_warnings', help: 'Treat non-type warnings as fatal',
+      ..addFlag('fatal-warnings', help: 'Treat non-type warnings as fatal',
           defaultsTo: false, negatable: false)
-      ..addFlag('show_package_warnings', help: 'Show warnings from package: imports',
+      ..addFlag('show-package-warnings', help: 'Show warnings from package: imports',
          defaultsTo: false, negatable: false)
-      ..addFlag('show_sdk_warnings', help: 'Show warnings from SDK imports',
+      ..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 {
       var results = parser.parse(args);
       // help requests
       if (results['help']) {
         _showUsage(parser);
         exit(0);
@@ skipping 117 matching lines @@
 
   _getNextFlagIndex(args, i) {
     for ( ; i < args.length; ++i) {
       if (args[i].startsWith('--')) {
         return i;
       }
     }
     return i;
   }
 }