fsck.c: pass along the fsck_msg_id in the fsck_error callback

Change the fsck_error callback to also pass along the
fsck_msg_id. Before this change the only way to get the message id was
to parse it back out of the "message".

Let's pass it down explicitly for the benefit of callers that might
want to use it, as discussed in [1].

Passing the msg_type is now redundant, as you can always get it back
from the msg_id, but I'm not changing that convention. It's really
common to need the msg_type, and the report() function itself (which
calls "fsck_error") needs to call fsck_msg_type() to discover
it. Let's not needlessly re-do that work in the user callback.

1. https://lore.kernel.org/git/87blcja2ha.fsf@evledraar.gmail.com/

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

Author: avar

builtin/fsck.c

@@ -84,7 +84,9 @@ static int objerror(struct object *obj, const char *err)
 static int fsck_error_func(struct fsck_options *o,
 			   const struct object_id *oid,
 			   enum object_type object_type,
-			   enum fsck_msg_type msg_type, const char *message)
+			   enum fsck_msg_type msg_type,
+			   enum fsck_msg_id msg_id,
+			   const char *message)
 {
 	switch (msg_type) {
 	case FSCK_WARN:

builtin/index-pack.c

@@ -1717,6 +1717,7 @@ static int print_dangling_gitmodules(struct fsck_options *o,
 				     const struct object_id *oid,
 				     enum object_type object_type,
 				     enum fsck_msg_type msg_type,
+				     enum fsck_msg_id msg_id,
 				     const char *message)
 {
 	/*
@@ -1727,7 +1728,7 @@ static int print_dangling_gitmodules(struct fsck_options *o,
 		printf("%s\n", oid_to_hex(oid));
 		return 0;
 	}
-	return fsck_error_function(o, oid, object_type, msg_type, message);
+	return fsck_error_function(o, oid, object_type, msg_type, msg_id, message);
 }
 
 int cmd_index_pack(int argc, const char **argv, const char *prefix)

builtin/mktag.c

@@ -18,6 +18,7 @@ static int mktag_fsck_error_func(struct fsck_options *o,
 				 const struct object_id *oid,
 				 enum object_type object_type,
 				 enum fsck_msg_type msg_type,
+				 enum fsck_msg_id msg_id,
 				 const char *message)
 {
 	switch (msg_type) {

fsck.c

@@ -227,7 +227,7 @@ static int report(struct fsck_options *options,
 	va_start(ap, fmt);
 	strbuf_vaddf(&sb, fmt, ap);
 	result = options->error_func(options, oid, object_type,
-				     msg_type, sb.buf);
+				     msg_type, msg_id, sb.buf);
 	strbuf_release(&sb);
 	va_end(ap);
 
@@ -1180,7 +1180,9 @@ int fsck_object(struct object *obj, void *data, unsigned long size,
 int fsck_error_function(struct fsck_options *o,
 			const struct object_id *oid,
 			enum object_type object_type,
-			enum fsck_msg_type msg_type, const char *message)
+			enum fsck_msg_type msg_type,
+			enum fsck_msg_id msg_id,
+			const char *message)
 {
 	if (msg_type == FSCK_WARN) {
 		warning("object %s: %s", fsck_describe_object(o, oid), message);

fsck.h

@@ -101,11 +101,13 @@ typedef int (*fsck_walk_func)(struct object *obj, enum object_type object_type,
 /* callback for fsck_object, type is FSCK_ERROR or FSCK_WARN */
 typedef int (*fsck_error)(struct fsck_options *o,
 			  const struct object_id *oid, enum object_type object_type,
-			  enum fsck_msg_type msg_type, const char *message);
+			  enum fsck_msg_type msg_type, enum fsck_msg_id msg_id,
+			  const char *message);
 
 int fsck_error_function(struct fsck_options *o,
 			const struct object_id *oid, enum object_type object_type,
-			enum fsck_msg_type msg_type, const char *message);
+			enum fsck_msg_type msg_type, enum fsck_msg_id msg_id,
+			const char *message);
 
 struct fsck_options {
 	fsck_walk_func walk;