[PATCH v20 25/48] replace.c: use the ref transaction functions for updates

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Update replace.c to use ref transactions for updates.

Reviewed-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
Signed-off-by: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>
---
 builtin/replace.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/builtin/replace.c b/builtin/replace.c
index 1bb491d..7528f3d 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -153,7 +153,8 @@ static int replace_object_sha1(const char *object_ref,
 	unsigned char prev[20];
 	enum object_type obj_type, repl_type;
 	char ref[PATH_MAX];
-	struct ref_lock *lock;
+	struct ref_transaction *transaction;
+	struct strbuf err = STRBUF_INIT;
 
 	obj_type = sha1_object_info(object, NULL);
 	repl_type = sha1_object_info(repl, NULL);
@@ -166,12 +167,14 @@ static int replace_object_sha1(const char *object_ref,
 
 	check_ref_valid(object, prev, ref, sizeof(ref), force);
 
-	lock = lock_any_ref_for_update(ref, prev, 0, NULL);
-	if (!lock)
-		die("%s: cannot lock the ref", ref);
-	if (write_ref_sha1(lock, repl, NULL) < 0)
-		die("%s: cannot update the ref", ref);
+	transaction = ref_transaction_begin(&err);
+	if (!transaction ||
+	    ref_transaction_update(transaction, ref, repl, prev,
+				   0, !is_null_sha1(prev), &err) ||
+	    ref_transaction_commit(transaction, NULL, &err))
+		die("%s", err.buf);
 
+	ref_transaction_free(transaction);
 	return 0;
 }
 
-- 
2.0.0.420.g181e020.dirty

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