adding code to run a script in async with the keyboard ctrl-c handler…

… as a base to help create scripts without having to repeat boilerplate code

BAC0/scripts/Lite.py

@@ -496,3 +496,10 @@ async def __aexit__(self, exc_type, exc_val, exc_tb):
         self._log.info(
             f"{self.localObjName}|{self.Boid} disconnected. Exiting context manager."
         )
+
+    def get_device_by_id(self, id):
+        for each in self.registered_devices:
+            if each.properties.device_id == id:
+                return each
+        self._log.error(f"Device {id} not found")
+        raise ValueError('Device not found')

BAC0/scripts/script_runner.py

@@ -0,0 +1,34 @@
+import BAC0
+import asyncio
+from signal import SIGINT, SIGTERM, signal
+import click
+from BAC0.tools.jci_tec_points_list import tec_short_point_list
+from BAC0.tasks.RecurringTask import RecurringTask
+import os
+
+def run(main_task, bacnet):
+    global loop
+
+    def handler(sig, sig2):
+        bacnet._log.info(f"Got signal: {sig!s}, shutting down.")
+        bacnet.disconnect()
+        loop.stop()
+
+    try:
+        loop = asyncio.get_running_loop() #we also could have chosen get_event_loop(), and if we did we would not have needed to set_event_loop() and create a new event loop
+    except RuntimeError:
+        loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
+    # for sig in (SIGINT, SIGTERM):
+    #    loop.add_signal_handler(sig, handler)
+    signal(SIGINT, handler)
+    signal(SIGTERM, handler)
+
+    loop.create_task(main_task())
+    loop.run_forever()
+    tasks = asyncio.all_tasks(loop=loop)
+    for t in tasks:
+        t.cancel()
+    group = asyncio.gather(*tasks, return_exceptions=True)
+    loop.run_until_complete(group)
+    loop.close()