- Implement Platform.packageRoot and Platform.packageConfig based

runtime/bin/builtin.dart

Index: runtime/bin/builtin.dart
diff --git a/runtime/bin/builtin.dart b/runtime/bin/builtin.dart
index 7088bed33c1189d04296dd9b70cccc7b18326ba9..dc374f609a8769e7dd61b39ef6180a333d6f8c42 100644
--- a/runtime/bin/builtin.dart
+++ b/runtime/bin/builtin.dart
@@ -234,6 +234,9 @@ _setPackageRoot(String packageRoot) {
     packageRoot = _trimWindowsPath(packageRoot);
     _packageRoot = _workingDirectory.resolveUri(new Uri.file(packageRoot));

[Lasse Reichstein Nielsen, 2015/12/17 07:03:33]

Maybe use "new Uri.directory" instead. It ensures that the path ends in a slash
as a directory should (since it already ends in a slash, it shouldn't do
anything, so it's just a safety precaution).

[Ivan Posva, 2015/12/17 15:44:35]

The slash has already been added with _enforceTrailingSlash above and we would
need that anyway for the path with a scheme, so I am keeping this as is.

   }
+  // Now that we have determined the packageRoot value being used, set it
+  // up for use in Platform.packageRoot.
+  VMLibraryHooks.packageRoot = _packageRoot.toString();
   if (_traceLoading) {
     _log('Package root URI: $_packageRoot');
   }
@@ -482,6 +485,7 @@ void _loadPackagesMap(String packagesParam) {
     // resolve it against the working directory.
     packagesUri = _workingDirectory.resolveUri(packagesUri);
   }
+  VMLibraryHooks.packageConfig = packagesUri.toString();
   if (_traceLoading) {
     _log('Resolved packages map to: $packagesUri');
   }