Script to customize Let's Encrypt mails

sysadmin/letsencrypt_mail.py

@@ -0,0 +1,59 @@
+#!/usr/bin/python3
+
+# SPDX-FileCopyrightText: 2021 Luca Beltrame <lbeltrame@kde.org>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+from enum import Enum
+import fileinput
+
+import drymail  # Vendored
+
+
+SUBJECT = "Certbot status: {0}"
+HEADER = {"X-Notification-Type": "letsencrypt"}
+
+
+class State(Enum):
+
+    renewed = 1
+    no_action = 2
+    error = 3
+    unknown = 4
+
+    def __str__(self):
+        return f'{self.name}'
+
+
+def main():
+
+    state = State.unknown
+    text = list()
+
+    for line in fileinput.input():
+        line = line.strip()
+        text.append(line)
+
+        if "all renewals succeeded" in line:
+            state = State.renewed
+        elif "not due for renewal" in line:
+            state = State.no_action
+
+    text = "\n".join(text)
+    subject = SUBJECT.format(str(state))
+    message = drymail.Message(
+        sender=("Certbot renewal bot", "notify@dennogumi.org"),
+        receivers=["root"],
+        subject=subject,
+        headers=HEADER,
+        text=text
+    )
+
+    client = drymail.SMTPMailer(
+        host='localhost')
+
+    client.send(message)
+
+
+if __name__ == "__main__":
+    main()