Add --dbc argument to plotjuggler (#23919)

* add --dbc argument

* Update tools/plotjuggler/juggle.py

* update readme

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

tools/plotjuggler/README.md

@@ -12,8 +12,7 @@ Once you've cloned and are in openpilot, this command will download PlotJuggler
 
 ```
 $ ./juggle.py -h
-usage: juggle.py [-h] [--demo] [--qlog] [--can] [--stream] [--layout [LAYOUT]] [--install]
-                 [route_or_segment_name] [segment_count]
+usage: juggle.py [-h] [--demo] [--qlog] [--can] [--stream] [--layout [LAYOUT]] [--install] [--dbc DBC] [route_or_segment_name] [segment_count]
 
 A helper to run PlotJuggler on openpilot routes
 
@@ -30,6 +29,8 @@ optional arguments:
   --stream              Start PlotJuggler in streaming mode (default: False)
   --layout [LAYOUT]     Run PlotJuggler with a pre-defined layout (default: None)
   --install             Install or update PlotJuggler + plugins (default: False)
+  --dbc DBC             Set the DBC name to load for parsing CAN data. If not set, the DBC will be
+                        automatically inferred from the logs. (default: None)
 ```
 
 Examples using route name:

tools/plotjuggler/juggle.py

@@ -75,7 +75,7 @@ def start_juggler(fn=None, dbc=None, layout=None):
   subprocess.call(cmd, shell=True, env=env, cwd=juggle_dir)
 
 
-def juggle_route(route_or_segment_name, segment_count, qlog, can, layout):
+def juggle_route(route_or_segment_name, segment_count, qlog, can, layout, dbc=None):
   segment_start = 0
   if 'cabana' in route_or_segment_name:
     query = parse_qs(urlparse(route_or_segment_name).query)
@@ -113,7 +113,7 @@ def juggle_route(route_or_segment_name, segment_count, qlog, can, layout):
     all_data = [d for d in all_data if d.which() not in ['can', 'sendcan']]
 
   # Infer DBC name from logs
-  dbc = None
+  if dbc is None:
     for cp in [m for m in all_data if m.which() == 'carParams']:
       try:
         DBC = __import__(f"selfdrive.car.{cp.carParams.carName}.values", fromlist=['DBC']).DBC
@@ -138,6 +138,7 @@ if __name__ == "__main__":
   parser.add_argument("--stream", action="store_true", help="Start PlotJuggler in streaming mode")
   parser.add_argument("--layout", nargs='?', help="Run PlotJuggler with a pre-defined layout")
   parser.add_argument("--install", action="store_true", help="Install or update PlotJuggler + plugins")
+  parser.add_argument("--dbc", help="Set the DBC name to load for parsing CAN data. If not set, the DBC will be automatically inferred from the logs.")
   parser.add_argument("route_or_segment_name", nargs='?', help="The route or segment name to plot (cabana share URL accepted)")
   parser.add_argument("segment_count", type=int, nargs='?', help="The number of segments to plot")
 
@@ -158,4 +159,4 @@ if __name__ == "__main__":
     start_juggler(layout=args.layout)
   else:
     route_or_segment_name = DEMO_ROUTE if args.demo else args.route_or_segment_name.strip()
-    juggle_route(route_or_segment_name, args.segment_count, args.qlog, args.can, args.layout)
+    juggle_route(route_or_segment_name, args.segment_count, args.qlog, args.can, args.layout, args.dbc)