Merge pull request #180 from dispatchrun/run-forever-args

Optionally run a coroutine when using `dispatch.run_forever`

Author: chriso

src/dispatch/__init__.py

@@ -5,7 +5,7 @@
 import asyncio
 import os
 from http.server import ThreadingHTTPServer
-from typing import Any, Callable, Coroutine, Optional, TypeVar, overload
+from typing import Any, Awaitable, Callable, Coroutine, Optional, TypeVar, overload
 from urllib.parse import urlsplit
 
 from typing_extensions import ParamSpec, TypeAlias
@@ -96,7 +96,7 @@ async def main(coro: Coroutine[Any, Any, T], addr: Optional[str] = None) -> T:
 
 
 def run(coro: Coroutine[Any, Any, T], addr: Optional[str] = None) -> T:
-    """Run the default dispatch server. The default server uses a function
+    """Run the default Dispatch server. The default server uses a function
     registry where functions tagged by the `@dispatch.function` decorator are
     registered.
 
@@ -119,9 +119,27 @@ def run(coro: Coroutine[Any, Any, T], addr: Optional[str] = None) -> T:
     return asyncio.run(main(coro, addr))
 
 
-def run_forever():
-    """Run the default dispatch server forever."""
-    return run(asyncio.Event().wait())
+def run_forever(
+    coro: Optional[Coroutine[Any, Any, T]] = None, addr: Optional[str] = None
+):
+    """Run the default Dispatch server forever.
+
+    Args:
+        coro: A coroutine to optionally run as the entrypoint.
+
+        addr: The address to bind the server to. If not provided, the server
+            will bind to the address specified by the `DISPATCH_ENDPOINT_ADDR`
+            environment variable. If the environment variable is not set, the
+            server will bind to `localhost:8000`.
+    """
+    wait = asyncio.Event().wait()
+    coro = chain(coro, wait) if coro is not None else wait
+    return run(coro=coro, addr=addr)
+
+
+async def chain(*awaitables: Awaitable[Any]):
+    for a in awaitables:
+        await a
 
 
 def batch() -> Batch: