Server options handling.

pkg/analysis_server/lib/src/context_manager.dart

 // Copyright (c) 2014, 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 context.directory.manager;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:core' hide Resource;
 
 import 'package:analysis_server/src/analysis_server.dart';
+import 'package:analysis_server/src/server_options.dart';
 import 'package:analysis_server/uri/resolver_provider.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
 import 'package:analyzer/source/package_map_provider.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/source/path_filter.dart';
 import 'package:analyzer/source/pub_package_map_provider.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_io.dart';
@@ skipping 277 matching lines @@
 }
 
 /**
  * Class that maintains a mapping from included/excluded paths to a set of
  * folders that should correspond to analysis contexts.
  */
 class ContextManagerImpl implements ContextManager {
   /**
    * Temporary flag to hide WIP .packages support (DEP 5).
    */
-  static bool ENABLE_PACKAGESPEC_SUPPORT = false;
+  static bool ENABLE_PACKAGESPEC_SUPPORT =
+      serverOptions.isSet('ContextManagerImpl.ENABLE_PACKAGESPEC_SUPPORT');
 
   /**
    * The name of the `lib` directory.
    */
   static const String LIB_DIR_NAME = 'lib';
 
   /**
    * The name of `packages` folders.
    */
   static const String PACKAGES_NAME = 'packages';
@@ skipping 1011 matching lines @@
 
   PackagesFileDisposition(this.packages) {}
 
   @override
   String get packageRoot => null;
 
   @override
   Iterable<UriResolver> createPackageUriResolvers(
       ResourceProvider resourceProvider) => const <UriResolver>[];
 }