Wait for network connection, so gluetun can come up

irc-topic-bot.py

@@ -42,6 +42,16 @@ def log(level, msg):
     ts = datetime.now().strftime("%Y-%m-%d %H:%M:%S UTC")
     print(f"[{ts}] [{level}] {msg}", flush=True)
 
+def wait_for_network(host="8.8.8.8", port=53, timeout=3, retry_interval=1):
+    log("*", "Waiting for network connection")
+    while True:
+        log(".", f"Still waiting for network connection, testing {host}:{port}")
+        try:
+            with socket.create_connection((host, port), timeout=timeout):
+                return
+        except OSError:
+            time.sleep(retry_interval)
+
 def sendmail(subject, message):
     try:
         msg = MIMEText(message)
@@ -130,6 +140,8 @@ def connect_to_channel_and_check_topic():
             return
 
 def main():
+    wait_for_network()
+
     try:
         res = requests.get("https://api.ipify.org", timeout=10)
         res.raise_for_status()