pack-bitmap: allow passing payloads to `show_reachable_fn()`

The `show_reachable_fn` callback is used by a couple of functions to
present reachable objects to the caller. The function does not provide a
way for the caller to pass a payload though, which is functionality that
we'll require in a subsequent commit.

Change the callback type to accept a payload and adapt all callsites
accordingly.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/pack-objects.c

@@ -1736,7 +1736,8 @@ static int add_object_entry(const struct object_id *oid, enum object_type type,
 static int add_object_entry_from_bitmap(const struct object_id *oid,
 					enum object_type type,
 					int flags UNUSED, uint32_t name_hash,
-					struct packed_git *pack, off_t offset)
+					struct packed_git *pack, off_t offset,
+					void *payload UNUSED)
 {
 	display_progress(progress_state, ++nr_seen);
 

builtin/rev-list.c

@@ -429,7 +429,8 @@ static int show_object_fast(
 	int exclude UNUSED,
 	uint32_t name_hash UNUSED,
 	struct packed_git *found_pack UNUSED,
-	off_t found_offset UNUSED)
+	off_t found_offset UNUSED,
+	void *payload UNUSED)
 {
 	fprintf(stdout, "%s\n", oid_to_hex(oid));
 	return 1;

pack-bitmap.c

@@ -1625,7 +1625,7 @@ static void show_extended_objects(struct bitmap_index *bitmap_git,
 		    (obj->type == OBJ_TAG && !revs->tag_objects))
 			continue;
 
-		show_reach(&obj->oid, obj->type, 0, eindex->hashes[i], NULL, 0);
+		show_reach(&obj->oid, obj->type, 0, eindex->hashes[i], NULL, 0, NULL);
 	}
 }
 
@@ -1663,7 +1663,8 @@ static void init_type_iterator(struct ewah_or_iterator *it,
 static void show_objects_for_type(
 	struct bitmap_index *bitmap_git,
 	enum object_type object_type,
-	show_reachable_fn show_reach)
+	show_reachable_fn show_reach,
+	void *payload)
 {
 	size_t i = 0;
 	uint32_t offset;
@@ -1715,7 +1716,7 @@ static void show_objects_for_type(
 			if (bitmap_git->hashes)
 				hash = get_be32(bitmap_git->hashes + index_pos);
 
-			show_reach(&oid, object_type, 0, hash, pack, ofs);
+			show_reach(&oid, object_type, 0, hash, pack, ofs, payload);
 		}
 	}
 
@@ -2518,13 +2519,13 @@ void traverse_bitmap_commit_list(struct bitmap_index *bitmap_git,
 {
 	assert(bitmap_git->result);
 
-	show_objects_for_type(bitmap_git, OBJ_COMMIT, show_reachable);
+	show_objects_for_type(bitmap_git, OBJ_COMMIT, show_reachable, NULL);
 	if (revs->tree_objects)
-		show_objects_for_type(bitmap_git, OBJ_TREE, show_reachable);
+		show_objects_for_type(bitmap_git, OBJ_TREE, show_reachable, NULL);
 	if (revs->blob_objects)
-		show_objects_for_type(bitmap_git, OBJ_BLOB, show_reachable);
+		show_objects_for_type(bitmap_git, OBJ_BLOB, show_reachable, NULL);
 	if (revs->tag_objects)
-		show_objects_for_type(bitmap_git, OBJ_TAG, show_reachable);
+		show_objects_for_type(bitmap_git, OBJ_TAG, show_reachable, NULL);
 
 	show_extended_objects(bitmap_git, revs, show_reachable);
 }

pack-bitmap.h

@@ -50,7 +50,8 @@ typedef int (*show_reachable_fn)(
 	int flags,
 	uint32_t hash,
 	struct packed_git *found_pack,
-	off_t found_offset);
+	off_t found_offset,
+	void *payload);
 
 struct bitmap_index;
 

reachable.c

@@ -341,7 +341,8 @@ static int mark_object_seen(const struct object_id *oid,
 			     int exclude UNUSED,
 			     uint32_t name_hash UNUSED,
 			     struct packed_git *found_pack UNUSED,
-			     off_t found_offset UNUSED)
+			     off_t found_offset UNUSED,
+			     void *payload UNUSED)
 {
 	struct object *obj = lookup_object_by_type(the_repository, oid, type);
 	if (!obj)