Support relative paths in path dependencies.

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 'dart:async';
 
 import '../../pkg/path/lib/path.dart' as path;
 
@@ skipping 23 matching lines @@
     });
   }
 
   /// 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) {
     return defer(() {
       var path = _getPackagePath(id);
       if (path == null) return false;
 
-      return createPackageSymlink(id.name, path, destPath).then((_) => true);
+      return createPackageSymlink(id.name, destPath, path).then((_) => true);
     });
   }
 
   /// Gets the path in the SDK's "pkg" directory to the directory containing
   /// package [id]. Returns `null` if the package could not be found.
   String _getPackagePath(PackageId id) {
     var pkgPath = path.join(sdk.rootDirectory, "pkg", id.description);
     return dirExists(pkgPath) ? pkgPath : null;
   }
 }