enhance ContextBuilder getAnalysisOptions to handle lints

pkg/analyzer/lib/src/command_line/arguments.dart

 // Copyright (c) 2016, 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 analyzer.src.command_line.arguments;
 
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/context/builder.dart';
 import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:args/args.dart';
 import 'package:path/path.dart';
 
 const String analysisOptionsFileOption = 'options';
 const String defineVariableOption = 'D';
 const String enableInitializingFormalAccessFlag = 'initializing-formal-access';
 const String enableStrictCallChecksFlag = 'enable-strict-call-checks';
 const String enableSuperMixinFlag = 'supermixin';
 const String ignoreUnrecognizedFlagsFlag = 'ignore-unrecognized-flags';
+const String lintsFlag = 'lints';
 const String noImplicitCastsFlag = 'no-implicit-casts';
 const String noImplicitDynamicFlag = 'no-implicit-dynamic';
 const String packageRootOption = 'package-root';
 const String packagesOption = 'packages';
 const String sdkPathOption = 'dart-sdk';
 const String sdkSummaryPathOption = 'dart-sdk-summary';
 const String strongModeFlag = 'strong';
 
 /**
  * Update [options] with the value of each analysis option command line flag.
  */
 void applyAnalysisOptionFlags(AnalysisOptionsImpl options, ArgResults args) {
   if (args.wasParsed(enableStrictCallChecksFlag)) {
     options.enableStrictCallChecks = args[enableStrictCallChecksFlag];
   }
   if (args.wasParsed(enableSuperMixinFlag)) {
     options.enableSuperMixins = args[enableSuperMixinFlag];
   }
   if (args.wasParsed(noImplicitCastsFlag)) {
     options.implicitCasts = !args[noImplicitCastsFlag];
   }
   if (args.wasParsed(noImplicitDynamicFlag)) {
     options.implicitDynamic = !args[noImplicitDynamicFlag];
   }
   if (args.wasParsed(strongModeFlag)) {
     options.strongMode = args[strongModeFlag];
   }
+  if (args.wasParsed(lintsFlag)) {
+    options.lint = args[lintsFlag];
+  }
 }
 
 /**
  * Use the given [resourceProvider], [contentCache] and command-line [args] to
  * create a context builder.
  */
 ContextBuilderOptions createContextBuilderOptions(ArgResults args,
     {bool strongMode, bool trackCacheDependencies}) {
   ContextBuilderOptions builderOptions = new ContextBuilderOptions();
   builderOptions.argResults = args;
@@ skipping 115 matching lines @@
           'Enable support for allowing access to field formal parameters in a '
           'constructor\'s initializer list',
       defaultsTo: false,
       negatable: false,
       hide: hide || ddc);
   parser.addFlag(enableSuperMixinFlag,
       help: 'Relax restrictions on mixins (DEP 34).',
       defaultsTo: false,
       negatable: false,
       hide: hide);
+  if (!ddc) {
+    parser.addFlag(lintsFlag,
+        help: 'Show lint results.', defaultsTo: false, negatable: true);
+  }
 }
 
 /**
  * Find arguments of the form -Dkey=value
  * or argument pairs of the form -Dkey value
  * and place those key/value pairs into [definedVariables].
  * Return a list of arguments with the key/value arguments removed.
  */
 List<String> extractDefinedVariables(
     List<String> args, Map<String, String> definedVariables) {
@@ skipping 107 matching lines @@
           .replaceAll('\r\n', '\n')
           .replaceAll('\r', '\n')
           .split('\n')
           .where((String line) => line.isNotEmpty));
     } on FileSystemException catch (e) {
       throw new Exception('Failed to read file specified by $lastArg : $e');
     }
   }
   return args;
 }