Track Source objects in PackageNames.

lib/src/source/unknown.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.
 
 import 'dart:async';
 
 import 'package:pub_semver/pub_semver.dart';
 
 import '../package.dart';
 import '../pubspec.dart';
@@ skipping 17 matching lines @@
   /// Two unknown sources are the same if their names are the same.
   bool operator==(other) =>
       other is UnknownSource &&
       other.name == name;
 
   int get hashCode => name.hashCode;
 
   bool descriptionsEqual(description1, description2) =>
       description1 == description2;
 
+  int hashDescription(description) => description.hashCode;
+
   PackageRef parseRef(String name, description, {String containingPath}) =>
-      new PackageRef(name, this.name, description);
+      new PackageRef(name, this, description);
 
   PackageId parseId(String name, Version version, description) =>
-      new PackageId(name, this.name, version, description);
+      new PackageId(name, this, version, description);
 }
 
 class _BoundUnknownSource extends BoundSource {
   final UnknownSource source;
 
   final SystemCache systemCache;
 
   _BoundUnknownSource(this.source, this.systemCache);
 
   Future<List<PackageId>> doGetVersions(PackageRef ref) =>
       throw new UnsupportedError(
           "Cannot get package versions from unknown source '${source.name}'.");
 
   Future<Pubspec> doDescribe(PackageId id) => throw new UnsupportedError(
       "Cannot describe a package from unknown source '${source.name}'.");
 
   Future get(PackageId id, String symlink) => throw new UnsupportedError(
       "Cannot get an unknown source '${source.name}'.");
 
   /// Returns the directory where this package can be found locally.
   String getDirectory(PackageId id) => throw new UnsupportedError(
       "Cannot find a package from an unknown source '${source.name}'.");
 }