[PATCH v3 01/14] refs.c make ref_transaction_create a wrapper to ref_transaction_update

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Signed-off-by: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>
---
 refs.c | 13 ++-----------
 refs.h |  7 ++++---
 2 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/refs.c b/refs.c
index dfbf003..a9f91ab 100644
--- a/refs.c
+++ b/refs.c
@@ -3487,23 +3487,14 @@ int ref_transaction_create(struct ref_transaction *transaction,
 			   int flags, const char *msg,
 			   struct strbuf *err)
 {
-	struct ref_update *update;
-
 	if (transaction->state != REF_TRANSACTION_OPEN)
 		die("BUG: create called for transaction that is not open");
 
 	if (!new_sha1 || is_null_sha1(new_sha1))
 		die("BUG: create ref with null new_sha1");
 
-	update = add_update(transaction, refname);
-
-	hashcpy(update->new_sha1, new_sha1);
-	hashclr(update->old_sha1);
-	update->flags = flags;
-	update->have_old = 1;
-	if (msg)
-		update->msg = xstrdup(msg);
-	return 0;
+	return ref_transaction_update(transaction, refname, new_sha1,
+				      null_sha1, flags, 1, msg, err);
 }
 
 int ref_transaction_delete(struct ref_transaction *transaction,
diff --git a/refs.h b/refs.h
index db463d0..495740d 100644
--- a/refs.h
+++ b/refs.h
@@ -283,9 +283,10 @@ struct ref_transaction *ref_transaction_begin(struct strbuf *err);
 /*
  * Add a reference update to transaction.  new_sha1 is the value that
  * the reference should have after the update, or zeros if it should
- * be deleted.  If have_old is true, then old_sha1 holds the value
- * that the reference should have had before the update, or zeros if
- * it must not have existed beforehand.
+ * be deleted.  If have_old is true and old_sha is not the null_sha1
+ * then the previous value of the ref must match or the update will fail.
+ * If have_old is true and old_sha1 is the null_sha1 then the ref must not
+ * already exist and a new ref will be created with new_sha1.
  * Function returns 0 on success and non-zero on failure. A failure to update
  * means that the transaction as a whole has failed and will need to be
  * rolled back.
-- 
2.0.0.467.g08c0633

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