[PATCH 11/44] send-pack: detect when the server doesn't support our hash

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Detect when the server doesn't support our hash algorithm and abort.

Signed-off-by: brian m. carlson <sandals@xxxxxxxxxxxxxxxxxxxx>
---
 send-pack.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/send-pack.c b/send-pack.c
index d1b7edc995..fb037568a9 100644
--- a/send-pack.c
+++ b/send-pack.c
@@ -362,6 +362,7 @@ int send_pack(struct send_pack_args *args,
 	int atomic_supported = 0;
 	int use_push_options = 0;
 	int push_options_supported = 0;
+	int object_format_supported = 0;
 	unsigned cmds_sent = 0;
 	int ret;
 	struct async demux;
@@ -388,6 +389,9 @@ int send_pack(struct send_pack_args *args,
 	if (server_supports("push-options"))
 		push_options_supported = 1;
 
+	if (!server_supports_hash(the_hash_algo->name, &object_format_supported))
+		die(_("the receiving end does not support this repository's hash algorithm"));
+
 	if (args->push_cert != SEND_PACK_PUSH_CERT_NEVER) {
 		int len;
 		push_cert_nonce = server_feature_value("push-cert", &len);
@@ -428,6 +432,8 @@ int send_pack(struct send_pack_args *args,
 		strbuf_addstr(&cap_buf, " atomic");
 	if (use_push_options)
 		strbuf_addstr(&cap_buf, " push-options");
+	if (object_format_supported)
+		strbuf_addf(&cap_buf, " object-format=%s", the_hash_algo->name);
 	if (agent_supported)
 		strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
 



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