[PATCH 2/3] merge: use refresh_and_write_cache

[Thomas Gummerer <t.gummerer@gmail.com>]

Use the 'refresh_and_write_cache()' convenience function introduced in
the last commit, instead of refreshing and writing the index manually
in merge.c

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
---
 builtin/merge.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/builtin/merge.c b/builtin/merge.c
index e2ccbc44e2..b5e31ce283 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -691,11 +691,8 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
 	struct lock_file lock = LOCK_INIT;
 	const char *head_arg = "HEAD";
 
-	hold_locked_index(&lock, LOCK_DIE_ON_ERROR);
-	refresh_cache(REFRESH_QUIET);
-	if (write_locked_index(&the_index, &lock,
-			       COMMIT_LOCK | SKIP_IF_UNCHANGED))
-		return error(_("Unable to write index."));
+	if (refresh_and_write_cache(REFRESH_QUIET, COMMIT_LOCK | SKIP_IF_UNCHANGED) < 0)
+		return -1;
 
 	if (!strcmp(strategy, "recursive") || !strcmp(strategy, "subtree")) {
 		int clean, x;
@@ -860,13 +857,9 @@ static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
 {
 	struct object_id result_tree, result_commit;
 	struct commit_list *parents, **pptr = &parents;
-	struct lock_file lock = LOCK_INIT;
 
-	hold_locked_index(&lock, LOCK_DIE_ON_ERROR);
-	refresh_cache(REFRESH_QUIET);
-	if (write_locked_index(&the_index, &lock,
-			       COMMIT_LOCK | SKIP_IF_UNCHANGED))
-		return error(_("Unable to write index."));
+	if (refresh_and_write_cache(REFRESH_QUIET, COMMIT_LOCK | SKIP_IF_UNCHANGED) < 0)
+		return -1;
 
 	write_tree_trivial(&result_tree);
 	printf(_("Wonderful.\n"));
-- 
2.23.0.rc2.194.ge5444969c9