fix: add services for playlist reloading

doc/systemd/klangbecken-reload-jingles.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Reload Jingles playlist after expire to workaround missing inotify support
+
+[Service]
+Type=simple
+EnvironmentFile=/etc/klangbecken.conf
+ExecStart=/bin/bash -c 'echo "jingles.reload" | nc -U ${KLANGBECKEN_PLAYER_SOCKET}'
+User=liquidsoap
+Group=liquidsoap
+
+[Install]
+WantedBy=multi-user.target

doc/systemd/klangbecken-reload-jingles.timer

@@ -0,0 +1,8 @@
+[Unit]
+Description=Run klangbecken-reload-jingles.service hourly at :30
+
+[Timer]
+OnCalendar=*-*-* *:05:30
+
+[Install]
+WantedBy=timers.target

klangbecken/cli.py

@@ -397,6 +397,27 @@ def disable_expired_cmd(data_dir):
                         [MetadataChange("weight", 0)],
                     )
 
+    # currently liquidsoap does not notify when the playlist changes
+    # solving this the dirty way, because we hope that liquidsoap supports
+    # inotify properly in newer version than 1.3.7 which would make reloading
+    # the playlist obsolete.
+    from .player import LiquidsoapClient
+    from os import environ
+
+    if "KLANGBECKEN_PLAYER_SOCKET" in environ:
+        player_socket = environ["KLANGBECKEN_PLAYER_SOCKET"]
+        try:
+            with LiquidsoapClient(player_socket) as client:
+                client.command("jingles.reload")
+        except FileNotFoundError:
+            print(f"Could not communicate with Liquidsoap via socket {player_socket}")
+            exit(1)
+    else:
+        print(
+            "Liquidsoap player socket environment variable (KLANGBECKEN_PLAYER_SOCKET) is not defined."
+        )
+        exit(1)
+
 
 def main():
     """Klangbecken audio playout system.