fix(unixfsnode): have reifier add path selection to normal nodes

have reifier add path selection to all protobuf nodes, even ones that are not unixfs

Author: hannahhoward

reification.go

@@ -34,12 +34,12 @@ func Reify(ctx context.Context, maybePBNodeRoot ipld.Node, lsys *ipld.LinkSystem
 	}
 	if !pbNode.FieldData().Exists() {
 		// no data field, therefore, not UnixFS
-		return pbNode, nil
+		return defaultReifier(ctx, pbNode, lsys)
 	}
 	data, err := data.DecodeUnixFSData(pbNode.Data.Must().Bytes())
 	if err != nil {
 		// we could not decode the UnixFS data, therefore, not UnixFS
-		return pbNode, nil
+		return defaultReifier(ctx, pbNode, lsys)
 	}
 	builder, ok := reifyFuncs[data.FieldDataType().Int()]
 	if !ok {
@@ -54,3 +54,9 @@ var reifyFuncs = map[int64]reifyTypeFunc{
 	data.Data_Directory: directory.NewUnixFSBasicDir,
 	data.Data_HAMTShard: hamt.NewUnixFSHAMTShard,
 }
+
+// treat non-unixFS nodes like directories -- allow them to lookup by link
+// TODO: Make this a separate node as directors gain more functionality
+func defaultReifier(context.Context, dagpb.PBNode, *ipld.LinkSystem) (ipld.Node, error) {
+	return &_UnixFSBasicDir{_substrate: substrate}, nil
+}