[PATCH v2 10/38] refs: add a transaction_commit() method

[Michael Haggerty <mhagger@xxxxxxxxxxxx>]

From: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>

Signed-off-by: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>
Signed-off-by: David Turner <dturner@xxxxxxxxxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
Signed-off-by: Jeff King <peff@xxxxxxxx>
Signed-off-by: Michael Haggerty <mhagger@xxxxxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
 refs.c               |  9 +++++++++
 refs/files-backend.c | 10 ++++++----
 refs/refs-internal.h |  5 +++++
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/refs.c b/refs.c
index 9d6bcb1..9475844 100644
--- a/refs.c
+++ b/refs.c
@@ -1377,3 +1377,12 @@ void assert_main_repository(struct ref_store *refs, const char *caller)
 	if (*refs->submodule)
 		die("BUG: %s called for a submodule", caller);
 }
+
+/* backend functions */
+int ref_transaction_commit(struct ref_transaction *transaction,
+			   struct strbuf *err)
+{
+	struct ref_store *refs = get_ref_store(NULL);
+
+	return refs->be->transaction_commit(refs, transaction, err);
+}
diff --git a/refs/files-backend.c b/refs/files-backend.c
index 6913d45..d896052 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -3710,11 +3710,12 @@ static int lock_ref_for_update(struct ref_update *update,
 	return 0;
 }
 
-int ref_transaction_commit(struct ref_transaction *transaction,
-			   struct strbuf *err)
+static int files_transaction_commit(struct ref_store *ref_store,
+				    struct ref_transaction *transaction,
+				    struct strbuf *err)
 {
 	struct files_ref_store *refs =
-		get_files_ref_store(NULL, "ref_transaction_commit");
+		files_downcast(ref_store, 0, "ref_transaction_commit");
 	int ret = 0, i;
 	struct string_list refs_to_delete = STRING_LIST_INIT_NODUP;
 	struct string_list_item *ref_to_delete;
@@ -4103,5 +4104,6 @@ int reflog_expire(const char *refname, const unsigned char *sha1,
 struct ref_storage_be refs_be_files = {
 	NULL,
 	"files",
-	files_ref_store_create
+	files_ref_store_create,
+	files_transaction_commit
 };
diff --git a/refs/refs-internal.h b/refs/refs-internal.h
index b952038..b7367ab 100644
--- a/refs/refs-internal.h
+++ b/refs/refs-internal.h
@@ -535,10 +535,15 @@ int read_raw_ref(const char *refname, unsigned char *sha1,
  */
 typedef struct ref_store *ref_store_init_fn(const char *submodule);
 
+typedef int ref_transaction_commit_fn(struct ref_store *refs,
+				      struct ref_transaction *transaction,
+				      struct strbuf *err);
+
 struct ref_storage_be {
 	struct ref_storage_be *next;
 	const char *name;
 	ref_store_init_fn *init;
+	ref_transaction_commit_fn *transaction_commit;
 };
 
 extern struct ref_storage_be refs_be_files;
-- 
2.9.3