refs: implement iteration over only per-worktree refs

diff --git a/refs/files-backend.c b/refs/files-backend.c
index 82b3ac0dbc1c7b4665515e6b04ce2689674253b0..47710fcf286283871c0949e888e4b319a7e83616 100644 (file)
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -1798,6 +1798,10 @@ static int files_ref_iterator_advance(struct ref_iterator *ref_iterator)
        int ok;
 
        while ((ok = ref_iterator_advance(iter->iter0)) == ITER_OK) {
+               if (iter->flags & DO_FOR_EACH_PER_WORKTREE_ONLY &&
+                   ref_type(iter->iter0->refname) != REF_TYPE_PER_WORKTREE)
+                       continue;
+
                if (!(iter->flags & DO_FOR_EACH_INCLUDE_BROKEN) &&
                    !ref_resolves_to_object(iter->iter0->refname,
                                            iter->iter0->oid,