From 4cbcd45ce908e72a04bead980bd631b932e6ef03 Mon Sep 17 00:00:00 2001
From: Kevin O'Connor <kevin@koconnor.net>
Date: Sat, 13 Mar 2021 15:02:41 -0500
Subject: [PATCH] serialhdl: Only load the CAN module if CAN bus is configured

Temporarily postpone loading the CAN module so that moonraker (and
similar) can improve upgrade scripts.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
---
 klippy/serialhdl.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/klippy/serialhdl.py b/klippy/serialhdl.py
index 19b67088..9294b120 100644
--- a/klippy/serialhdl.py
+++ b/klippy/serialhdl.py
@@ -4,7 +4,7 @@
 #
 # This file may be distributed under the terms of the GNU GPLv3 license.
 import logging, threading, os
-import serial, can
+import serial
 
 import msgproto, chelper, util
 
@@ -103,6 +103,7 @@ class SerialReader:
                 self.serialqueue, receive_window)
         return True
     def connect_canbus(self, canbus_uuid, canbus_nodeid, canbus_iface="can0"):
+        import can # XXX
         txid = canbus_nodeid * 2 + 256
         filters = [{"can_id": txid+1, "can_mask": 0x7ff, "extended": False}]
         # Prep for SET_NODEID command