tag: factor out get_tagged_oid()

diff --git a/refs/files-backend.c b/refs/files-backend.c
index 63e55e67730fcf01d8ca545e15b3c1e5b50c4b06..d60767ab739f0e20e45c700368f7f9f24a52c3f8 100644 (file)
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -2143,13 +2143,24 @@ static struct ref_iterator_vtable files_reflog_iterator_vtable = {
 static struct ref_iterator *reflog_iterator_begin(struct ref_store *ref_store,
                                                  const char *gitdir)
 {
-       struct files_reflog_iterator *iter = xcalloc(1, sizeof(*iter));
-       struct ref_iterator *ref_iterator = &iter->base;
+       struct dir_iterator *diter;
+       struct files_reflog_iterator *iter;
+       struct ref_iterator *ref_iterator;
        struct strbuf sb = STRBUF_INIT;
 
-       base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable, 0);
        strbuf_addf(&sb, "%s/logs", gitdir);
-       iter->dir_iterator = dir_iterator_begin(sb.buf);
+
+       diter = dir_iterator_begin(sb.buf, 0);
+       if (!diter) {
+               strbuf_release(&sb);
+               return empty_ref_iterator_begin();
+       }
+
+       iter = xcalloc(1, sizeof(*iter));
+       ref_iterator = &iter->base;
+
+       base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable, 0);
+       iter->dir_iterator = diter;
        iter->ref_store = ref_store;
        strbuf_release(&sb);