Fix symlink test

build_runner_core/lib/src/asset/writer.dart

@@ -44,7 +44,17 @@ class DelayedAssetWriter implements RunnerAssetWriter {
  /// Obtain a [RunnerAssetReader] capable of reading pending writes of this
  /// writer (before they are persisted with [onBuildComplete]).
  RunnerAssetReader reader(RunnerAssetReader delegate, String rootPackage) {
- return _DelayAwareReader(delegate, this, rootPackage);
+ final reader = _DelayAwareReader(delegate, this, rootPackage);
+
+ if (delegate is PathProvidingAssetReader) {
+ // `createMergedOutputDirectories` needs a path providing asset reader, so
+ // keep that interface intact if we're wrapping a reader capable of doing
+ // that.
+ return _PathProvidingDelayAwareReader(
+ reader, delegate as PathProvidingAssetReader);
+ } else {
+ return reader;
+ }
  }
 
  @override
@@ -136,3 +146,37 @@ class _DelayAwareReader extends AssetReader implements RunnerAssetReader {
  return encoding.decode(await readAsBytes(id));
  }
 }
+
+class _PathProvidingDelayAwareReader extends AssetReader
+ with RunnerAssetReader
+ implements PathProvidingAssetReader {
+ final _DelayAwareReader _reader;
+ final PathProvidingAssetReader _original;
+
+ _PathProvidingDelayAwareReader(this._reader, this._original);
+
+ @override
+ Future<bool> canRead(AssetId id) {
+ return _reader.canRead(id);
+ }
+
+ @override
+ Stream<AssetId> findAssets(Glob glob, {String? package}) {
+ return _reader.findAssets(glob, package: package);
+ }
+
+ @override
+ String pathTo(AssetId id) {
+ return _original.pathTo(id);
+ }
+
+ @override
+ Future<List<int>> readAsBytes(AssetId id) {
+ return _reader.readAsBytes(id);
+ }
+
+ @override
+ Future<String> readAsString(AssetId id, {Encoding encoding = utf8}) {
+ return _reader.readAsString(id, encoding: encoding);
+ }
+}