configure_rabbitmq: Always output to stdout handler

Author: ndevenish

HISTORY.rst

@@ -2,6 +2,10 @@
 History
 =======
 
+Unreleased
+----------
+- Fixed blank output from ``zocalo.configure_rabbitmq`` when zocalo logging is configured. (`#286 <https://github.com/DiamondLightSource/python-zocalo/pull/286>`)
+
 1.3.0 (2025-07-04)
 ------------------
 - Minimum supported python is now 3.11.

src/zocalo/cli/configure_rabbitmq.py

@@ -386,6 +386,8 @@ def _configure_users(api, rabbitmq_user_config_area: Path):
 
 def run():
     logging.basicConfig(level=logging.INFO, format="%(message)s")
+    handler = logging.getLogger().handlers[0]
+
     zc = zocalo.configuration.from_file()
     zc.activate()
     parser = argparse.ArgumentParser(formatter_class=argparse.RawTextHelpFormatter)
@@ -405,6 +407,10 @@ def run():
     zc.add_command_line_options(parser)
     args = parser.parse_args()
 
+    # Zocalo config can remove the handler, hiding errors
+    if handler not in logging.getLogger().handlers:
+        logging.getLogger().addHandler(handler)
+
     api = RabbitMQAPI.from_zocalo_configuration(zc)
 
     with open(args.configuration) as in_file: