[PATCH v10 15/36] merge-recursive: make !o->detect_rename codepath more obvious

[Elijah Newren]

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.

Reviewed-by: Stefan Beller <sbel...@google.com>
Signed-off-by: Elijah Newren <new...@gmail.com>
Signed-off-by: Junio C Hamano <gits...@pobox.com>
---
 merge-recursive.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/merge-recursive.c b/merge-recursive.c
index fc96653f63..5da60b9516 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1339,8 +1339,6 @@ 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;
@@ -1658,6 +1656,12 @@ 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);
@@ -1668,6 +1672,9 @@ 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);
-- 
2.17.0.290.ge988e9ce2a