send-pack: kill pack-objects helper on signal or exit

We spawn an external pack-objects process to actually send
objects to the remote side. If we are killed by a signal
during this process, the pack-objects will keep running and
complete the push, which may surprise the user. We should
take it down when we go down.

Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: peff

send-pack.c

@@ -85,6 +85,7 @@ static int pack_objects(int fd, struct ref *refs, struct oid_array *extra, struc
 	po.in = -1;
 	po.out = args->stateless_rpc ? -1 : fd;
 	po.git_cmd = 1;
+	po.clean_on_exit = 1;
 	if (start_command(&po))
 		die_errno("git pack-objects failed");