git-fetch-pack: Implement client part of the multi_ack extension

This patch concludes the series, which makes
git-fetch-pack/git-upload-pack negotiate a potentially better set of
common revs. It should make a difference when fetching from a repository
with a few branches.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/connect.c b/connect.c
index b171c5dbc8..57e25a34bc 100644
--- a/connect.c
+++ b/connect.c
@@ -59,8 +59,11 @@ int get_ack(int fd, unsigned char *result_sha1)
 	if (!strcmp(line, "NAK"))
 		return 0;
 	if (!strncmp(line, "ACK ", 3)) {
-		if (!get_sha1_hex(line+4, result_sha1))
+		if (!get_sha1_hex(line+4, result_sha1)) {
+			if (strstr(line+45, "continue"))
+				return 2;
 			return 1;
+		}
 	}
 	die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
 }