ref-filter: use "struct object_id" consistently

Internally we store a "struct object_id", and all of our
callers have one to pass us. But we insist that they peel it
to its bare-sha1 hash, which we then hashcpy() into place.
Let's pass it around as an object_id, which future-proofs us
for a post-sha1 world.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/tag.c

@@ -117,7 +117,7 @@ static int verify_tag(const char *name, const char *ref,
 		return -1;
 
 	if (format->format)
-		pretty_print_ref(name, oid->hash, format);
+		pretty_print_ref(name, oid, format);
 
 	return 0;
 }

builtin/verify-tag.c

@@ -72,7 +72,7 @@ int cmd_verify_tag(int argc, const char **argv, const char *prefix)
 		}
 
 		if (format.format)
-			pretty_print_ref(name, oid.hash, &format);
+			pretty_print_ref(name, &oid, &format);
 	}
 	return had_error;
 }

ref-filter.c

@@ -1826,12 +1826,12 @@ static const struct object_id *match_points_at(struct oid_array *points_at,
 
 /* Allocate space for a new ref_array_item and copy the objectname and flag to it */
 static struct ref_array_item *new_ref_array_item(const char *refname,
-						 const unsigned char *objectname,
+						 const struct object_id *oid,
 						 int flag)
 {
 	struct ref_array_item *ref;
 	FLEX_ALLOC_STR(ref, refname, refname);
-	hashcpy(ref->objectname.hash, objectname);
+	oidcpy(&ref->objectname, oid);
 	ref->flag = flag;
 
 	return ref;
@@ -1927,7 +1927,7 @@ static int ref_filter_handler(const char *refname, const struct object_id *oid,
 	 * to do its job and the resulting list may yet to be pruned
 	 * by maxcount logic.
 	 */
-	ref = new_ref_array_item(refname, oid->hash, flag);
+	ref = new_ref_array_item(refname, oid, flag);
 	ref->commit = commit;
 
 	REALLOC_ARRAY(ref_cbdata->array->items, ref_cbdata->array->nr + 1);
@@ -2165,11 +2165,11 @@ void show_ref_array_item(struct ref_array_item *info,
 	putchar('\n');
 }
 
-void pretty_print_ref(const char *name, const unsigned char *sha1,
+void pretty_print_ref(const char *name, const struct object_id *oid,
 		      const struct ref_format *format)
 {
 	struct ref_array_item *ref_item;
-	ref_item = new_ref_array_item(name, sha1, 0);
+	ref_item = new_ref_array_item(name, oid, 0);
 	ref_item->kind = ref_kind_from_refname(name);
 	show_ref_array_item(ref_item, format);
 	free_array_item(ref_item);

ref-filter.h

@@ -132,7 +132,7 @@ void setup_ref_filter_porcelain_msg(void);
  * Print a single ref, outside of any ref-filter. Note that the
  * name must be a fully qualified refname.
  */
-void pretty_print_ref(const char *name, const unsigned char *sha1,
+void pretty_print_ref(const char *name, const struct object_id *oid,
 		      const struct ref_format *format);
 
 #endif /*  REF_FILTER_H  */