fetch-pack: support shallow requests

Enable shallow clones and deepen requests using protocol version 2 if
the server 'fetch' command supports the 'shallow' feature.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/connect.h b/connect.h
index 8898d44952..0e69c6709c 100644
--- a/connect.h
+++ b/connect.h
@@ -17,5 +17,7 @@ struct packet_reader;
 extern enum protocol_version discover_version(struct packet_reader *reader);
 
 extern int server_supports_v2(const char *c, int die_on_error);
+extern int server_supports_feature(const char *c, const char *feature,
+				   int die_on_error);
 
 #endif