packed_read_raw_ref(): read the reference from the mmapped buffer

Instead of reading the reference from the `ref_cache`, read it directly from the mmapped buffer. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Michael Haggerty committed Sep 25, 2017 at 10:00 UTC f3987ab36d74382852c0db03ac25e58f83178225
1 file changed +9 -5
refs/packed-backend.c
+9 -5
@@ -876,18 +876,22 @@ static int packed_read_raw_ref(struct ref_store *ref_store,
876 {
877 struct packed_ref_store *refs =
878 packed_downcast(ref_store, REF_STORE_READ, "read_raw_ref");
879 -
880 - struct ref_entry *entry;
879 + struct packed_ref_cache *packed_refs = get_packed_ref_cache(refs);
880 + const char *rec;
881
882 *type = 0;
883
884 - entry = get_packed_ref(refs, refname);
885 - if (!entry) {
884 + rec = find_reference_location(packed_refs, refname, 1);
885 +
886 + if (!rec) {
887 + /* refname is not a packed reference. */
888 errno = ENOENT;
889 return -1;
890 }
891
890 - hashcpy(sha1, entry->u.value.oid.hash);
892 + if (get_sha1_hex(rec, sha1))
893 + die_invalid_line(refs->path, rec, packed_refs->eof - rec);
894 +
895 *type = REF_ISPACKED;
896 return 0;
897 }