send-pack: check ref->status before updating tracking refs

Previously, we manually checked the 'NONE' and 'UPTODATE'
conditions. Now that we have ref->status, we can easily
say "only update if we pushed successfully".

This adds a test for and fixes a regression introduced in
ed31df31 where deleted refs did not have their tracking
branches removed. This was due to a bogus per-ref error test
that is superseded by the more accurate ref->status flag.

Signed-off-by: Jeff King <peff@peff.net>
Completely-Acked-By: Alex "Sleepy" Riesen <raa.lkml@gmail.com>
Acked-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-send-pack.c

@@ -180,24 +180,17 @@ static int receive_status(int in)
 static void update_tracking_ref(struct remote *remote, struct ref *ref)
 {
 	struct refspec rs;
-	int will_delete_ref;
 
-	rs.src = ref->name;
-	rs.dst = NULL;
-
-	if (!ref->peer_ref)
+	if (ref->status != REF_STATUS_OK)
 		return;
 
-	will_delete_ref = is_null_sha1(ref->peer_ref->new_sha1);
-
-	if (!will_delete_ref &&
-			!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1))
-		return;
+	rs.src = ref->name;
+	rs.dst = NULL;
 
 	if (!remote_find_tracking(remote, &rs)) {
 		if (args.verbose)
 			fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
-		if (is_null_sha1(ref->peer_ref->new_sha1)) {
+		if (ref->deletion) {
 			if (delete_ref(rs.dst, NULL))
 				error("Failed to delete");
 		} else
@@ -444,8 +437,7 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
 
 	if (!args.dry_run && remote) {
 		for (ref = remote_refs; ref; ref = ref->next)
-			if (!is_null_sha1(ref->new_sha1))
-				update_tracking_ref(remote, ref);
+			update_tracking_ref(remote, ref);
 	}
 
 	if (!new_refs)

t/t5404-tracking-branches.sh

@@ -45,4 +45,9 @@ test_expect_success 'check tracking branches not updated for failed refs' '
 	test "$(git rev-parse origin/b2)" = "$b2"
 '
 
+test_expect_success 'deleted branches have their tracking branches removed' '
+	git push origin :b1 &&
+	test "$(git rev-parse origin/b1)" = "origin/b1"
+'
+
 test_done