[PATCH v2 3/4] diff-lib: refactor match_stat_with_submodule

[Calvin Wan <calvinwan@google.com>]

Flatten out the if statements in match_stat_with_submodule so the
logic is more readable and easier for future patches to add to.
orig_flags didn't need to be set if the cache entry wasn't a
GITLINK so defer setting it.

Signed-off-by: Calvin Wan <calvinwan@google.com>
---
 diff-lib.c | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/diff-lib.c b/diff-lib.c
index 2edea41a23..e249322141 100644
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -73,18 +73,25 @@ static int match_stat_with_submodule(struct diff_options *diffopt,
 				     unsigned *dirty_submodule)
 {
 	int changed = ie_match_stat(diffopt->repo->index, ce, st, ce_option);
-	if (S_ISGITLINK(ce->ce_mode)) {
-		struct diff_flags orig_flags = diffopt->flags;
-		if (!diffopt->flags.override_submodule_config)
-			set_diffopt_flags_from_submodule_config(diffopt, ce->name);
-		if (diffopt->flags.ignore_submodules)
-			changed = 0;
-		else if (!diffopt->flags.ignore_dirty_submodules &&
+	struct diff_flags orig_flags;
+
+	if (!S_ISGITLINK(ce->ce_mode))
+		goto ret;
+
+	orig_flags = diffopt->flags;
+	if (!diffopt->flags.override_submodule_config)
+		set_diffopt_flags_from_submodule_config(diffopt, ce->name);
+	if (diffopt->flags.ignore_submodules) {
+		changed = 0;
+		goto cleanup;
+	}
+	if (!diffopt->flags.ignore_dirty_submodules &&
 			 (!changed || diffopt->flags.dirty_submodules))
-			*dirty_submodule = is_submodule_modified(ce->name,
-								 diffopt->flags.ignore_untracked_in_submodules);
+		*dirty_submodule = is_submodule_modified(ce->name,
+					diffopt->flags.ignore_untracked_in_submodules);
+cleanup:
 		diffopt->flags = orig_flags;
-	}
+ret:
 	return changed;
 }
 
-- 
2.38.0.rc1.362.ged0d419d3c-goog