fsck.c: refactor and rename common config callback

Refactor code I recently changed in 1f3299fda9 (fsck: make
fsck_config() re-usable, 2021-01-05) so that I could use fsck's config
callback in mktag in 1f3299fda9 (fsck: make fsck_config() re-usable,
2021-01-05).

I don't know what I was thinking in structuring the code this way, but
it clearly makes no sense to have an fsck_config_internal() at all
just so it can get a fsck_options when git_config() already supports
passing along some void* data.

Let's just make use of that instead, which gets us rid of the two
wrapper functions, and brings fsck's common config callback in line
with other such reusable config callbacks.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/fsck.c

@@ -71,11 +71,6 @@ static const char *printable_type(const struct object_id *oid,
 	return ret;
 }
 
-static int fsck_config(const char *var, const char *value, void *cb)
-{
-	return fsck_config_internal(var, value, cb, &fsck_obj_options);
-}
-
 static int objerror(struct object *obj, const char *err)
 {
 	errors_found |= ERROR_OBJECT;
@@ -803,7 +798,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 	if (name_objects)
 		fsck_enable_object_names(&fsck_walk_options);
 
-	git_config(fsck_config, NULL);
+	git_config(git_fsck_config, &fsck_obj_options);
 
 	if (connectivity_only) {
 		for_each_loose_object(mark_loose_for_connectivity, NULL, 0);

builtin/mktag.c

@@ -14,11 +14,6 @@ static int option_strict = 1;
 
 static struct fsck_options fsck_options = FSCK_OPTIONS_STRICT;
 
-static int mktag_config(const char *var, const char *value, void *cb)
-{
-	return fsck_config_internal(var, value, cb, &fsck_options);
-}
-
 static int mktag_fsck_error_func(struct fsck_options *o,
 				 const struct object_id *oid,
 				 enum object_type object_type,
@@ -93,7 +88,7 @@ int cmd_mktag(int argc, const char **argv, const char *prefix)
 	fsck_options.error_func = mktag_fsck_error_func;
 	fsck_set_msg_type(&fsck_options, "extraheaderentry", "warn");
 	/* config might set fsck.extraHeaderEntry=* again */
-	git_config(mktag_config, NULL);
+	git_config(git_fsck_config, &fsck_options);
 	if (fsck_tag_standalone(NULL, buf.buf, buf.len, &fsck_options,
 				&tagged_oid, &tagged_type))
 		die(_("tag on stdin did not pass our strict fsck check"));

fsck.c

@@ -1323,9 +1323,9 @@ int fsck_finish(struct fsck_options *options)
 	return ret;
 }
 
-int fsck_config_internal(const char *var, const char *value, void *cb,
-			 struct fsck_options *options)
+int git_fsck_config(const char *var, const char *value, void *cb)
 {
+	struct fsck_options *options = cb;
 	if (strcmp(var, "fsck.skiplist") == 0) {
 		const char *path;
 		struct strbuf sb = STRBUF_INIT;

fsck.h

@@ -109,7 +109,6 @@ const char *fsck_describe_object(struct fsck_options *options,
  * git_config() callback for use by fsck-y tools that want to support
  * fsck.<msg> fsck.skipList etc.
  */
-int fsck_config_internal(const char *var, const char *value, void *cb,
-			 struct fsck_options *options);
+int git_fsck_config(const char *var, const char *value, void *cb);
 
 #endif