[PATCH v20 39/48] refs.c: make delete_ref use a transaction

[Ronnie Sahlberg <sahlberg@google.com>]

Change delete_ref to use a ref transaction for the deletion. At the same time
since we no longer have any callers of repack_without_ref we can now delete
this function.

Change delete_ref to return 0 on success and 1 on failure instead of the
previous 0 on success either 1 or -1 on failure.

Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
---
 refs.c | 34 +++++++++++++---------------------
 1 file changed, 13 insertions(+), 21 deletions(-)

diff --git a/refs.c b/refs.c
index 3d070d5..92a06d4 100644
--- a/refs.c
+++ b/refs.c
@@ -2544,11 +2544,6 @@ int repack_without_refs(const char **refnames, int n, struct strbuf *err)
 	return ret;
 }
 
-static int repack_without_ref(const char *refname)
-{
-	return repack_without_refs(&refname, 1, NULL);
-}
-
 static int delete_ref_loose(struct ref_lock *lock, int flag)
 {
 	if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) {
@@ -2566,24 +2561,21 @@ static int delete_ref_loose(struct ref_lock *lock, int flag)
 
 int delete_ref(const char *refname, const unsigned char *sha1, int delopt)
 {
-	struct ref_lock *lock;
-	int ret = 0, flag = 0;
+	struct ref_transaction *transaction;
+	struct strbuf err = STRBUF_INIT;
 
-	lock = lock_ref_sha1_basic(refname, sha1, delopt, &flag);
-	if (!lock)
+	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)) {
+		error("%s", err.buf);
+		ref_transaction_free(transaction);
+		strbuf_release(&err);
 		return 1;
-	ret |= delete_ref_loose(lock, flag);
-
-	/* removing the loose one could have resurrected an earlier
-	 * packed one.  Also, if it was not loose we need to repack
-	 * without it.
-	 */
-	ret |= repack_without_ref(lock->ref_name);
-
-	unlink_or_warn(git_path("logs/%s", lock->ref_name));
-	clear_loose_ref_cache(&ref_cache);
-	unlock_ref(lock);
-	return ret;
+	}
+	ref_transaction_free(transaction);
+	return 0;
 }
 
 /*
-- 
2.0.0.420.g181e020.dirty