[PATCH v4 18/34] merge-recursive: make !o->detect_rename codepath more obvious

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Previously, if !o->detect_rename then get_renames() would return an
empty string_list, and then process_renames() would have nothing to
iterate over.  It seems more straightforward to simply avoid calling
either function in that case.

Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
 merge-recursive.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/merge-recursive.c b/merge-recursive.c
index cdd0afa047..da7c67eb82 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1329,8 +1329,6 @@ static struct string_list *get_renames(struct merge_options *o,
 	struct diff_options opts;
 
 	renames = xcalloc(1, sizeof(struct string_list));
-	if (!o->detect_rename)
-		return renames;
 
 	diff_setup(&opts);
 	opts.flags.recursive = 1;
@@ -1648,6 +1646,12 @@ static int handle_renames(struct merge_options *o,
 			  struct string_list *entries,
 			  struct rename_info *ri)
 {
+	ri->head_renames = NULL;
+	ri->merge_renames = NULL;
+
+	if (!o->detect_rename)
+		return 1;
+
 	ri->head_renames  = get_renames(o, head, common, head, merge, entries);
 	ri->merge_renames = get_renames(o, merge, common, head, merge, entries);
 	return process_renames(o, ri->head_renames, ri->merge_renames);
@@ -1658,6 +1662,9 @@ static void cleanup_rename(struct string_list *rename)
 	const struct rename *re;
 	int i;
 
+	if (rename == NULL)
+		return;
+
 	for (i = 0; i < rename->nr; i++) {
 		re = rename->items[i].util;
 		diff_free_filepair(re->pair);
-- 
2.15.0.408.g850bc54b15




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