Track Source objects in PackageNames.

lib/src/source/hosted.dart

 // Copyright (c) 2012, 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 'dart:io' as io;
 import "dart:convert";
 
 import 'package:http/http.dart' as http;
 import 'package:path/path.dart' as p;
@@ skipping 27 matching lines @@
     if (url != null) return url;
 
     return "https://pub.dartlang.org";
   }
 
   /// Returns a reference to a hosted package named [name].
   ///
   /// If [url] is passed, it's the URL of the pub server from which the package
   /// should be downloaded. It can be a [Uri] or a [String].
   PackageRef refFor(String name, {url}) =>
-      new PackageRef(name, 'hosted', _descriptionFor(name, url));
+      new PackageRef(name, this, _descriptionFor(name, url));
 
   /// Returns an ID for a hosted package named [name] at [version].
   ///
   /// If [url] is passed, it's the URL of the pub server from which the package
   /// should be downloaded. It can be a [Uri] or a [String].
   PackageId idFor(String name, Version version, {url}) =>
-      new PackageId(name, 'hosted', version, _descriptionFor(name, url));
+      new PackageId(name, this, version, _descriptionFor(name, url));
 
   /// Returns the description for a hosted package named [name] with the
   /// given package server [url].
   _descriptionFor(String name, [url]) {
     if (url == null) return name;
 
     if (url is! String && url is! Uri) {
       throw new ArgumentError.value(url, 'url', 'must be a Uri or a String.');
     }
 
     return {'name': name, 'url': url.toString()};
   }
 
   bool descriptionsEqual(description1, description2) =>
       _parseDescription(description1) == _parseDescription(description2);
 
+  int hashDescription(description) => _parseDescription.hashCode;
+
   /// Ensures that [description] is a valid hosted package description.
   ///
   /// There are two valid formats. A plain string refers to a package with the
   /// given name from the default host, while a map with keys "name" and "url"
   /// refers to a package with the given name from the host at the given URL.
   PackageRef parseRef(String name, description, {String containingPath}) {
     _parseDescription(description);
-    return new PackageRef(name, this.name, description);
+    return new PackageRef(name, this, description);
   }
 
   PackageId parseId(String name, Version version, description) {
     _parseDescription(description);
-    return new PackageId(name, this.name, version, description);
+    return new PackageId(name, this, version, description);
   }
 
   /// Parses the description for a package.
   ///
   /// If the package parses correctly, this returns a (name, url) pair. If not,
   /// this throws a descriptive FormatException.
   Pair<String, String> _parseDescription(description) {
     if (description is String) {
       return new Pair<String, String>(description, defaultUrl);
     }
@@ skipping 322 matching lines @@
     // Since HostedSource is cached, this will only be called for uncached
     // packages.
     throw new UnsupportedError("Cannot download packages when offline.");
   }
 
   Future<Pubspec> describeUncached(PackageId id) {
     throw new PackageNotFoundException(
         "${id.name} ${id.version} is not available in your system cache.");
   }
 }