Sort out detecing worker running

catfish/__main__.py

@@ -6,6 +6,7 @@ import click
 import daemonize
 
 from catfish import __version__, worker
+from catfish.utils.sockets import create_base_socket_dir, delete_base_socket_dir
 
 
 @click.group()
@@ -22,21 +23,20 @@ def start(ctx, port, no_fork):
     if worker.is_running():
         ctx.fail("Worker already running")
 
+    create_base_socket_dir()
+
     if no_fork:
-        worker.run(port)
+        return worker.run(port)
-    else:
     daemon = daemonize.Daemonize(
-            "catfish",
+        "catfish", worker.PID_FILE, functools.partial(worker.run, port), verbose=True
-            worker.PID_FILE,
-            functools.partial(worker.run, port),
-            foreground=no_fork,
     )
     try:
         # HACK: Temporary hack until https://github.com/thesharp/daemonize/pull/70 is solved
         os._exit = sys.exit
         daemon.start()
     except SystemExit:
-            worker.wait_for_worker()
+        pass
+    worker.wait_for_running_worker()
     proc = worker.get_running_process()
     click.echo("Worker started with pid {}".format(proc.pid))
 
@@ -49,6 +49,7 @@ def stop(ctx):
     proc = worker.get_running_process()
     click.echo("Terminating process {}".format(proc.pid))
     worker.stop_worker()
+    delete_base_socket_dir()
 
 
 if __name__ == "__main__":

catfish/utils/processes.py

@@ -35,6 +35,11 @@ def is_process_running(pid: int) -> bool:
         return False
 
 
-def wait_for_process(pid: int):
+def wait_for_process_start(pid: int):
     while not is_process_running(pid):
         time.sleep(0.1)
+
+
+def wait_for_process_terminate(pid: int):
+    while is_process_running(pid):
+        time.sleep(0.1)

catfish/utils/sockets.py

@@ -35,7 +35,10 @@ def create_base_socket_dir():
 
 
 def delete_base_socket_dir():
+    try:
         shutil.rmtree(BASE_SOCKET_DIR)
+    except FileNotFoundError:
+        pass
 
 
 def stdout_socket_for_pid(pid: int) -> str:

catfish/worker/__init__.py

@@ -14,27 +14,24 @@ PID_FILE = os.path.join(BASE_SOCKET_DIR, "catfish.pid")
 
 
 def is_running():
-    return os.path.exists(PID_FILE)
+    if not os.path.exists(PID_FILE):
+        return False
+    if not os.path.exists(WORKER_SERVER_SOCKET):
+        return False
+    try:
+        get_running_process()
+    except ValueError:
+        return False
+    return True
 
 
 def get_running_process() -> psutil.Process:
-    assert is_running()
     with open(PID_FILE) as f:
         return psutil.Process(int(f.read()))
 
 
-def wait_for_worker():
-    while True:
-        try:
-            get_running_process()
-            return
-        except ValueError:
-            pass
-        time.sleep(0.1)
-
-
 def wait_for_running_worker():
-    while not all([os.path.exists(WORKER_SERVER_SOCKET)]):
+    while not is_running():
         time.sleep(0.1)