fetch-pack: detect when the server doesn't support our hash

bk2204 · gitster · commit 48bf1415896d · 2020-05-27T10:07:06.000-07:00
Detect when the server doesn't support our hash algorithm and abort.

Signed-off-by: brian m. carlson &lt;sandals@crustytoothpaste.net&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/fetch-pack.c b/fetch-pack.c
@@ -1039,6 +1039,8 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args,
 		print_verbose(args, _("Server supports %s"), "deepen-relative");
 	else if (args->deepen_relative)
 		die(_("Server does not support --deepen"));
+	if (!server_supports_hash(the_hash_algo->name, NULL))
+		die(_("Server does not support this repository's object format"));
 
 	if (!args->no_dependents) {
 		mark_complete_and_common_ref(negotiator, args, &ref);
