Support self-referential package: imports with Pub.

utils/pub/sdk_source.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('sdk_source');
 
 #import('io.dart');
 #import('package.dart');
 #import('pubspec.dart');
 #import('source.dart');
@@ skipping 21 matching lines @@
 
   SdkSource(this._rootDir);
 
   /**
    * An SDK package has no dependencies. Its version number is inferred from the
    * revision number of the SDK itself.
    */
   Future<Pubspec> describe(PackageId id) {
     return readTextFile(join(rootDir, "revision")).transform((revision) {
       var version = new Version.parse("0.0.0-r.${revision.trim()}");
-      return new Pubspec(version, <PackageRef>[]);
+      return new Pubspec(id.name, version, <PackageRef>[]);
     });
   }
 
   /**
    * Since all the SDK files are already available locally, installation just
    * involves symlinking the SDK library into the packages directory.
    */
   Future<bool> install(PackageId id, String destPath) {
     // Look in "pkg" first.
     var sourcePath = join(rootDir, "pkg", id.description);
     return exists(sourcePath).chain((found) {
       if (!found) {
         // TODO(rnystrom): Get rid of this when all SDK packages are moved from
         // "lib" to "pkg".
         // Not in "pkg", so try "lib".
         sourcePath = join(rootDir, "lib", id.description);
         return exists(sourcePath).chain((found) {
           if (!found) return new Future<bool>.immediate(false);
           return createSymlink(sourcePath, destPath).transform((_) => true);
         });
       }
       return createSymlink(sourcePath, destPath).transform((_) => true);
     });
   }
 }