startup sequencer: when START_MODELS is false, run startup sequencer, but...

startup sequencer: when START_MODELS is false, run startup sequencer, but don't link start_world.target to multi-user.target. All the unit files should be created, but models, edc, local_dc and cps_xmit won't start.

src/python/rtcds/fe_generator/sequencer.py

@@ -19,9 +19,6 @@ class Sequencer(object):
         self.processes = FrontEndProcesses(target_dir)
 
     def create_start_sequence(self):
-        if not self.options["START_MODELS"]:
-            klog("START_MODELS is false. Quitting")
-            return
         if self.options["CDSRFM"]:
             klog("is CDSRFM host")
             before_world, world = self.create_cdsrfm_start_sequence(self.processes,
@@ -29,7 +26,7 @@ class Sequencer(object):
         else:
             klog("is standard front end host")
             before_world, world = self.create_frontend_start_sequence()
-        self.link_sequence(before_world, world)
+        self.link_sequence(before_world, world, self.options["START_MODELS"])
 
     def create_frontend_start_sequence(self):
         before_world = []
@@ -75,7 +72,7 @@ class Sequencer(object):
             ]
         return before_world, world
 
-    def link_sequence(self, before_world, world):
+    def link_sequence(self, before_world, world, start_models):
         self.processes.create_world_target()
 
         # link the first of each process to multi-user or to the world target
@@ -86,7 +83,10 @@ class Sequencer(object):
             self.processes.part_of(process.start, "rts-world.target")
         if len(before_world) > 0:
             self.processes.after("rts-world.target", before_world[-1].end)
-        self.processes.link_to("rts-world.target", "multi-user.target")
+        if start_models:
+            self.processes.link_to("rts-world.target", "multi-user.target")
+        else:
+            klog("START_MODELS is false.  Skipping model start.")
         self.processes.serialize_processes(before_world + world)
 
     class Delay(object):