Merge branch 'js/log-protocol-version'

Debugging aid.

* js/log-protocol-version:
  connect, protocol: log negotiated protocol version

connect.c

@@ -164,6 +164,8 @@ enum protocol_version discover_version(struct packet_reader *reader)
 		BUG("unknown protocol version");
 	}
 
+	trace2_data_intmax("transfer", NULL, "negotiated-version", version);
+
 	return version;
 }
 

protocol.c

@@ -73,6 +73,8 @@ enum protocol_version determine_protocol_version_server(void)
 		string_list_clear(&list, 0);
 	}
 
+	trace2_data_intmax("transfer", NULL, "negotiated-version", version);
+
 	return version;
 }
 

t/t5705-session-id-in-capabilities.sh

@@ -73,6 +73,17 @@ do
 		grep \"key\":\"server-sid\" tr2-client-events &&
 		grep \"key\":\"client-sid\" tr2-server-events
 	'
+
+	test_expect_success "client & server log negotiated version (v${PROTO})" '
+		test_when_finished "rm -rf local tr2-client-events tr2-server-events" &&
+		cp -r "$LOCAL_PRISTINE" local &&
+		GIT_TRACE2_EVENT="$(pwd)/tr2-client-events" \
+		git -c protocol.version=$PROTO -C local fetch \
+			--upload-pack "GIT_TRACE2_EVENT=\"$(pwd)/tr2-server-events\" git-upload-pack" \
+			origin &&
+		grep \"key\":\"negotiated-version\",\"value\":\"$PROTO\" tr2-client-events &&
+		grep \"key\":\"negotiated-version\",\"value\":\"$PROTO\" tr2-server-events
+	'
 done
 
 test_done