[PATCH 7/9] refs: get error message via refs_update_ref_extended()

[Jiang Xin <worldhello.net@gmail.com>]

From: Jiang Xin <zhiyou.jx@alibaba-inc.com>

The last parameter for "refs_update_ref_extended()" is an enum
"action_on_err", and we can not use this function to get the specific
error message. Extend this function again to get error message.

We will use the function "refs_update_ref_extended()" to reimplement
the function "files_copy_or_rename_ref()" in later commit.

Signed-off-by: Jiang Xin <zhiyou.jx@alibaba-inc.com>
---
 refs.c | 50 +++++++++++++++++++++++++-------------------------
 refs.h |  2 +-
 2 files changed, 26 insertions(+), 26 deletions(-)

diff --git a/refs.c b/refs.c
index e53f011e6b..60c741a584 100644
--- a/refs.c
+++ b/refs.c
@@ -1185,11 +1185,29 @@ int refs_update_ref(struct ref_store *refs, const char *msg,
 		    enum action_on_err onerr)
 {
 	struct reflog_info reflog_info;
+	struct strbuf err = STRBUF_INIT;
+	int ret;
 
 	reflog_info.msg = (char *)msg;
 	reflog_info.old_oid = NULL;
-	return refs_update_ref_extended(refs, refname, new_oid, old_oid,
-					flags, &reflog_info, onerr);
+	ret = refs_update_ref_extended(refs, refname, new_oid, old_oid,
+				       flags, &reflog_info, &err);
+	if (ret) {
+		const char *str = _("update_ref failed for ref '%s': %s");
+
+		switch (onerr) {
+		case UPDATE_REFS_MSG_ON_ERR:
+			error(str, refname, err.buf);
+			break;
+		case UPDATE_REFS_DIE_ON_ERR:
+			die(str, refname, err.buf);
+			break;
+		case UPDATE_REFS_QUIET_ON_ERR:
+			break;
+		}
+	}
+	strbuf_release(&err);
+	return ret;
 }
 
 int refs_update_ref_extended(struct ref_store *refs,
@@ -1198,37 +1216,19 @@ int refs_update_ref_extended(struct ref_store *refs,
 			     const struct object_id *old_oid,
 			     unsigned int flags,
 			     const struct reflog_info *reflog_info,
-			     enum action_on_err onerr)
+			     struct strbuf *err)
 {
 	struct ref_transaction *t = NULL;
-	struct strbuf err = STRBUF_INIT;
-	int ret = 0;
 
-	t = ref_store_transaction_begin(refs, &err);
+	t = ref_store_transaction_begin(refs, err);
 	if (!t ||
 	    ref_transaction_update_extended(t, refname, new_oid, old_oid,
-					    flags, reflog_info, &err) ||
-	    ref_transaction_commit(t, &err)) {
-		ret = 1;
+					    flags, reflog_info, err) ||
+	    ref_transaction_commit(t, err)) {
 		ref_transaction_free(t);
-	}
-	if (ret) {
-		const char *str = _("update_ref failed for ref '%s': %s");
-
-		switch (onerr) {
-		case UPDATE_REFS_MSG_ON_ERR:
-			error(str, refname, err.buf);
-			break;
-		case UPDATE_REFS_DIE_ON_ERR:
-			die(str, refname, err.buf);
-			break;
-		case UPDATE_REFS_QUIET_ON_ERR:
-			break;
-		}
-		strbuf_release(&err);
 		return 1;
 	}
-	strbuf_release(&err);
+
 	if (t)
 		ref_transaction_free(t);
 	return 0;
diff --git a/refs.h b/refs.h
index 0f21ba259f..85832c4863 100644
--- a/refs.h
+++ b/refs.h
@@ -825,7 +825,7 @@ int refs_update_ref_extended(struct ref_store *refs,
 			     const struct object_id *old_oid,
 			     unsigned int flags,
 			     const struct reflog_info *reflog_info,
-			     enum action_on_err onerr);
+			     struct strbuf *err);
 int update_ref(const char *msg, const char *refname,
 	       const struct object_id *new_oid, const struct object_id *old_oid,
 	       unsigned int flags, enum action_on_err onerr);
-- 
2.36.1.25.gc87d5ad63a.dirty