Handle awaitables on sous to avoid warnings

scone/sous/__main__.py

@@ -16,10 +16,12 @@
 #  along with Scone.  If not, see <https://www.gnu.org/licenses/>.
 
 import asyncio
+import itertools
 import logging
 import os
 import pwd
 import sys
+from itertools import filterfalse
 from pathlib import Path
 from typing import List, cast
 
@@ -76,6 +78,8 @@ async def main(args: List[str]):
 
     logger.info("Worktop dir is: %s", worktop.dir)
 
+    awaitables = []
+
     while True:
         try:
             message = await root.recv()
@@ -94,7 +98,7 @@ async def main(args: List[str]):
 
             logger.debug("going to sched task with %r", utensil)
 
-            asyncio.create_task(run_utensil(utensil, channel, worktop))
+            awaitables.append(asyncio.create_task(run_utensil(utensil, channel, worktop)))
         elif "lost" in message:
             # for a then-non-existent channel, but probably just waiting on us
             # retry without a default route.
@@ -102,6 +106,14 @@ async def main(args: List[str]):
         else:
             raise RuntimeError(f"Unknown ch0 message {message}")
 
+        for done_aw in filter(lambda aw: aw.done(), awaitables):
+            await done_aw
+
+        awaitables = list(filterfalse(lambda aw: aw.done(), awaitables))
+
+    for aw in awaitables:
+        await aw
+
 
 async def run_utensil(utensil: Utensil, channel: Channel, worktop: Worktop):
     try: