[PATCH 17/31] refs.c: make _update_reflog take an error argument

[Ronnie Sahlberg <sahlberg@google.com>]

Add a strbug argument to the update reflog transaction call so we can return
an error string back to the caller on failure.

Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
---
 builtin/reflog.c | 6 ++++--
 refs.c           | 3 ++-
 refs.h           | 3 ++-
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/builtin/reflog.c b/builtin/reflog.c
index 5f07647..2239249 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -319,7 +319,8 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
 
 	if (cb->t) {
 		transaction_update_reflog(cb->t, cb->refname, nsha1, osha1,
-					  email, timestamp, tz, message, 0);
+					  email, timestamp, tz, message, 0,
+					  NULL);
 		hashcpy(cb->last_kept_sha1, nsha1);
 	}
 	if (cb->cmd->verbose)
@@ -372,7 +373,8 @@ static int expire_reflog(const char *ref, const unsigned char *sha1, int unused,
 		transaction_update_reflog(cb.t, cb.refname,
 					  null_sha1, null_sha1, NULL,
 					  0, 0, NULL,
-					  REFLOG_TRUNCATE);
+					  REFLOG_TRUNCATE,
+					  NULL);
 	}
 
 	cb.cmd = cmd;
diff --git a/refs.c b/refs.c
index 59f1ca1..8b09258 100644
--- a/refs.c
+++ b/refs.c
@@ -3367,7 +3367,8 @@ int transaction_update_reflog(struct ref_transaction *transaction,
 			      const unsigned char *email,
 			      unsigned long timestamp, int tz,
 			      const char *msg,
-			      int flags)
+			      int flags,
+			      struct strbuf *err)
 {
 	struct ref_update *update;
 	int i;
diff --git a/refs.h b/refs.h
index ebe7368..6c628bb 100644
--- a/refs.h
+++ b/refs.h
@@ -285,7 +285,8 @@ int transaction_update_reflog(struct ref_transaction *transaction,
 			      const unsigned char *email,
 			      unsigned long timestamp, int tz,
 			      const char *msg,
-			      int flags);
+			      int flags,
+			      struct strbuf *err);
 
 /*
  * Commit all of the changes that have been queued in transaction, as
-- 
2.0.0.rc3.506.g3739a35