refs: add create_only option to refs_update_symref_extended

Allow the caller to specify that it only wants to update the symref if
it does not already exist. Silently ignore the error from the
transaction API if the symref already exists.

Signed-off-by: Bence Ferdinandy <bence@ferdinandy.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/refs.h b/refs.h
index b243739e4b..be38377b1f 100644
--- a/refs.h
+++ b/refs.h
@@ -586,7 +586,7 @@ int refs_update_symref(struct ref_store *refs, const char *refname,
 
 int refs_update_symref_extended(struct ref_store *refs, const char *refname,
 		       const char *target, const char *logmsg,
-		       struct strbuf *referent);
+		       struct strbuf *referent, int create_only);
 
 enum action_on_err {
 	UPDATE_REFS_MSG_ON_ERR,