ban cereal and msgq

.importlinter

@@ -1,6 +1,8 @@
 [importlinter]
 root_packages =
     openpilot
+    cereal
+    capnp
 
 [importlinter:contract:1]
 name = Forbid imports from openpilot.selfdrive.car to openpilot.system
@@ -8,6 +10,8 @@ type = forbidden
 source_modules =
     openpilot.selfdrive.car
 forbidden_modules =
+    cereal
+    capnp
     openpilot.common.params
     openpilot.system
     openpilot.body
@@ -40,4 +44,13 @@ ignore_imports =
     # these two will still live in openpilot, but require some modification
     openpilot.selfdrive.car.fw_versions -> openpilot.common.params
     openpilot.selfdrive.car.ecu_addrs -> openpilot.common.params
+    openpilot.selfdrive.car.tests.test_models -> capnp
+    openpilot.selfdrive.car.tests.test_car_interfaces -> cereal
+    openpilot.selfdrive.car.tests.test_car_interfaces -> cereal.messaging
+    openpilot.selfdrive.car.tests.test_car_interfaces -> openpilot.selfdrive.test.fuzzy_generation
+    openpilot.selfdrive.car.tests.test_models -> cereal
+    openpilot.selfdrive.car.tests.test_models -> cereal.messaging
+    openpilot.selfdrive.car.card -> cereal
+    openpilot.selfdrive.car.card -> cereal.messaging
+    openpilot.selfdrive.car.vin -> cereal.messaging
 unmatched_ignore_imports_alerting = warn

selfdrive/car/vin.py

@@ -1,7 +1,6 @@
 #!/usr/bin/env python3
 import re
 
-import cereal.messaging as messaging
 from panda.python.uds import get_rx_addr_for_tx_addr, FUNCTIONAL_ADDRS
 from openpilot.selfdrive.car import carlog
 from openpilot.selfdrive.car.isotp_parallel_query import IsoTpParallelQuery
@@ -63,6 +62,7 @@ def get_vin(logcan, sendcan, buses, timeout=0.1, retry=2, debug=False):
 if __name__ == "__main__":
   import argparse
   import time
+  import cereal.messaging as messaging
 
   parser = argparse.ArgumentParser(description='Get VIN of the car')
   parser.add_argument('--debug', action='store_true')