Use a PID file (to be used in a systemd unit)

jekyll_webhook.py

@@ -7,6 +7,7 @@ import tempfile
 
 import git
 from flask import Flask, request
+from pid import PidFile
 import sarge
 from systemd.journal import JournalHandler
 
@@ -20,9 +21,6 @@ def push_hook_to_server():
 
     app.logger.info("New data received. Processing...")
 
-    handler = JournalHandler()
-    app.logger.addHandler(handler)
-
     data = json.loads(request.data)
 
     repository = data["repository"]
@@ -43,4 +41,7 @@ def push_hook_to_server():
     return "OK"
 
 if __name__ == "__main__":
-   app.run()
+    with PidFile("/run/webhook/jekyll_webhook.pid", chmod=0o600):
+        handler = JournalHandler()
+        app.logger.addHandler(handler)
+        app.run()