await_me_maybe utility function

datasette/utils/__init__.py

@@ -1,3 +1,4 @@
+import asyncio
 from contextlib import contextmanager
 from collections import OrderedDict
 import base64
@@ -51,6 +52,14 @@ ENV SQLITE_EXTENSIONS /usr/lib/x86_64-linux-gnu/mod_spatialite.so
 """
 
 
+async def await_me_maybe(value):
+    if callable(value):
+        value = value()
+    if asyncio.iscoroutine(value):
+        value = await value
+    return value
+
+
 def urlsafe_components(token):
     "Splits token on commas and URL decodes each component"
     return [urllib.parse.unquote_plus(b) for b in token.split(",")]