refs.c: pass the ref log message to _create/delete/update instead of _commit

Change the ref transaction API so that we pass the reflog message to the
create/delete/update functions instead of to ref_transaction_commit.
This allows different reflog messages for each ref update in a multi-ref
transaction.

Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 21 insertions, 13 deletions

diff --git a/refs.c b/refs.c
index 430857b..f5d7bd7 100644
--- a/refs.c
+++ b/refs.c
@@ -2445,8 +2445,8 @@ static void prune_ref(struct ref_to_prune *r)
 	transaction = ref_transaction_begin(&err);
 	if (!transaction ||
 	    ref_transaction_delete(transaction, r->name, r->sha1,
-				   REF_ISPRUNING, 1, &err) ||
-	    ref_transaction_commit(transaction, NULL, &err)) {
+				   REF_ISPRUNING, 1, NULL, &err) ||
+	    ref_transaction_commit(transaction, &err)) {
 		ref_transaction_free(transaction);
 		error("%s", err.buf);
 		strbuf_release(&err);
@@ -2621,8 +2621,8 @@ int delete_ref(const char *refname, const unsigned char *sha1, int delopt)
 	transaction = ref_transaction_begin(&err);
 	if (!transaction ||
 	    ref_transaction_delete(transaction, refname, sha1, delopt,
-				   sha1 && !is_null_sha1(sha1), &err) ||
-	    ref_transaction_commit(transaction, NULL, &err)) {
+				   sha1 && !is_null_sha1(sha1), NULL, &err) ||
+	    ref_transaction_commit(transaction, &err)) {
 		error("%s", err.buf);
 		ref_transaction_free(transaction);
 		strbuf_release(&err);
@@ -3404,6 +3404,7 @@ struct ref_update {
 	int have_old; /* 1 if old_sha1 is valid, 0 otherwise */
 	struct ref_lock *lock;
 	int type;
+	char *msg;
 	const char refname[FLEX_ARRAY];
 };
 
@@ -3446,9 +3447,10 @@ void ref_transaction_free(struct ref_transaction *transaction)
 	if (!transaction)
 		return;
 
-	for (i = 0; i < transaction->nr; i++)
+	for (i = 0; i < transaction->nr; i++) {
+		free(transaction->updates[i]->msg);
 		free(transaction->updates[i]);
-
+	}
 	free(transaction->updates);
 	free(transaction);
 }
@@ -3469,7 +3471,7 @@ int ref_transaction_update(struct ref_transaction *transaction,
 			   const char *refname,
 			   const unsigned char *new_sha1,
 			   const unsigned char *old_sha1,
-			   int flags, int have_old,
+			   int flags, int have_old, const char *msg,
 			   struct strbuf *err)
 {
 	struct ref_update *update;
@@ -3486,13 +3488,15 @@ int ref_transaction_update(struct ref_transaction *transaction,
 	update->have_old = have_old;
 	if (have_old)
 		hashcpy(update->old_sha1, old_sha1);
+	if (msg)
+		update->msg = xstrdup(msg);
 	return 0;
 }
 
 int ref_transaction_create(struct ref_transaction *transaction,
 			   const char *refname,
 			   const unsigned char *new_sha1,
-			   int flags,
+			   int flags, const char *msg,
 			   struct strbuf *err)
 {
 	struct ref_update *update;
@@ -3509,13 +3513,15 @@ int ref_transaction_create(struct ref_transaction *transaction,
 	hashclr(update->old_sha1);
 	update->flags = flags;
 	update->have_old = 1;
+	if (msg)
+		update->msg = xstrdup(msg);
 	return 0;
 }
 
 int ref_transaction_delete(struct ref_transaction *transaction,
 			   const char *refname,
 			   const unsigned char *old_sha1,
-			   int flags, int have_old,
+			   int flags, int have_old, const char *msg,
 			   struct strbuf *err)
 {
 	struct ref_update *update;
@@ -3533,6 +3539,8 @@ int ref_transaction_delete(struct ref_transaction *transaction,
 		assert(!is_null_sha1(old_sha1));
 		hashcpy(update->old_sha1, old_sha1);
 	}
+	if (msg)
+		update->msg = xstrdup(msg);
 	return 0;
 }
 
@@ -3546,8 +3554,8 @@ int update_ref(const char *action, const char *refname,
 	t = ref_transaction_begin(&err);
 	if (!t ||
 	    ref_transaction_update(t, refname, sha1, oldval, flags,
-				   !!oldval, &err) ||
-	    ref_transaction_commit(t, action, &err)) {
+				   !!oldval, action, &err) ||
+	    ref_transaction_commit(t, &err)) {
 		const char *str = "update_ref failed for ref '%s': %s";
 
 		ref_transaction_free(t);
@@ -3593,7 +3601,7 @@ static int ref_update_reject_duplicates(struct ref_update **updates, int n,
 }
 
 int ref_transaction_commit(struct ref_transaction *transaction,
-			   const char *msg, struct strbuf *err)
+			   struct strbuf *err)
 {
 	int ret = 0, delnum = 0, i;
 	const char **delnames;
@@ -3642,7 +3650,7 @@ int ref_transaction_commit(struct ref_transaction *transaction,
 
 		if (!is_null_sha1(update->new_sha1)) {
 			ret = write_ref_sha1(update->lock, update->new_sha1,
-					     msg);
+					     update->msg);
 			update->lock = NULL; /* freed by write_ref_sha1 */
 			if (ret) {
 				if (err)