fix: Run closable cleanup on exit

examples/fetch_reports.py

@@ -7,7 +7,7 @@
 from findmy.reports import RemoteAnisetteProvider
 
 # URL to (public or local) anisette server
-ANISETTE_SERVER = "https://ani.intra.mikealmel.ooo"
+ANISETTE_SERVER = "http://localhost:6969"
 
 logging.basicConfig(level=logging.INFO)
 

findmy/util/closable.py

@@ -1,7 +1,10 @@
 """ABC for async classes that need to be cleaned up before exiting."""
+
 from __future__ import annotations
 
 import asyncio
+import atexit
+import contextlib
 import logging
 from abc import ABC, abstractmethod
 
@@ -20,18 +23,24 @@ def __init__(self, loop: asyncio.AbstractEventLoop | None = None) -> None:
         """
         self._loop: asyncio.AbstractEventLoop | None = loop
 
+        atexit.register(self.close_sync)
+
     @abstractmethod
     async def close(self) -> None:
         """Clean up."""
         raise NotImplementedError
 
+    def close_sync(self) -> None:
+        """Clean up."""
+        atexit.unregister(self.close_sync)
+
+        loop = self._loop or asyncio.get_event_loop()
+        if loop.is_running():
+            loop.call_soon_threadsafe(loop.create_task, self.close())
+        else:
+            loop.run_until_complete(self.close())
+
     def __del__(self) -> None:
         """Attempt to automatically clean up when garbage collected."""
-        try:
-            loop = self._loop or asyncio.get_running_loop()
-            if loop.is_running():
-                loop.call_soon_threadsafe(loop.create_task, self.close())
-            else:
-                loop.run_until_complete(self.close())
-        except RuntimeError:
-            pass
+        with contextlib.suppress(RuntimeError):
+            self.close_sync()