Get rid of #source in pub.

utils/pub/entrypoint.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.
 
+#library('entrypoint');
+
+#import('io.dart');
+#import('package.dart');
+#import('system_cache.dart');
+#import('version.dart');
+#import('utils.dart');
+
 /**
  * Pub operates over a directed graph of dependencies that starts at a root
  * "entrypoint" package. This is typically the package where the current
  * working directory is located. An entrypoint knows the [root] package it is
  * associated with and is responsible for managing the "packages" directory
  * for it.
  *
  * That directory contains symlinks to all packages used by an app. These links
  * point either to the [SystemCache] or to some other location on the local
  * filesystem.
@@ skipping 114 matching lines @@
    * package we should use starting from this entrypoint.
    */
   Future<PackageId> resolve(PackageRef ref) {
     // TODO(rnystrom): This should use the lockfile to select the right version
     // once that's implemented. If the lockfile doesn't exist, it should
     // generate it. In the meantime, here's a dumb implementation:
     return new Future.immediate(
         new PackageId(ref.source, Version.none, ref.description));
   }
 }