[PATCH v4 34/34] merge-recursive: ensure we write updates for directory-renamed file

[Elijah Newren <newren@gmail.com>]

When a file is present in HEAD before the merge and the other side of the
merge does not modify that file, we try to avoid re-writing the file and
making it stat-dirty.  However, when a file is present in HEAD before the
merge and was in a directory that was renamed by the other side of the
merge, we have to move the file to a new location and re-write it.
Update the code that checks whether we can skip the update to also work in
the presence of directory renames.

Signed-off-by: Elijah Newren <newren@gmail.com>
---
 merge-recursive.c                   | 4 +---
 t/t6043-merge-rename-directories.sh | 2 +-
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/merge-recursive.c b/merge-recursive.c
index d00786f719..16c52a4347 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -2732,7 +2732,6 @@ static int merge_content(struct merge_options *o,
 
 	if (mfi.clean && !df_conflict_remains &&
 	    oid_eq(&mfi.oid, a_oid) && mfi.mode == a_mode) {
-		int path_renamed_outside_HEAD;
 		output(o, 3, _("Skipped %s (merged same as existing)"), path);
 		/*
 		 * The content merge resulted in the same file contents we
@@ -2740,8 +2739,7 @@ static int merge_content(struct merge_options *o,
 		 * are recorded at the correct path (which may not be true
 		 * if the merge involves a rename).
 		 */
-		path_renamed_outside_HEAD = !path2 || !strcmp(path, path2);
-		if (!path_renamed_outside_HEAD) {
+		if (was_tracked(path)) {
 			add_cacheinfo(o, mfi.mode, &mfi.oid, path,
 				      0, (!o->call_depth), 0);
 			return mfi.clean;
diff --git a/t/t6043-merge-rename-directories.sh b/t/t6043-merge-rename-directories.sh
index 8ed85c79de..f64c7d273b 100755
--- a/t/t6043-merge-rename-directories.sh
+++ b/t/t6043-merge-rename-directories.sh
@@ -3713,7 +3713,7 @@ test_expect_success '12b-setup: Moving one directory hierarchy into another' '
 	)
 '
 
-test_expect_failure '12b-check: Moving one directory hierarchy into another' '
+test_expect_success '12b-check: Moving one directory hierarchy into another' '
 	(
 		cd 12b &&
 
-- 
2.15.0.408.g850bc54b15