feat: implement getmail runner script and update email fetching configuration

terraform/modules/apps/mail/resources/getmail/runner.py

@@ -0,0 +1,44 @@
+import os, signal, subprocess, time, sys
+import logging
+
+INTERVAL = int(os.getenv("FETCH_INTERVAL_SECONDS", "120"))
+GETMAILDIR = "/var/getmail"
+CONFIG_DIR = "/getmail"
+JOBS = [f for f in os.listdir(CONFIG_DIR) if f.startswith("getmailrc_")]
+
+logging.basicConfig(
+    level=logging.INFO,
+    format="[%(asctime)s] %(levelname)s %(message)s",
+    datefmt="%Y-%m-%d %H:%M:%S",
+)
+
+stop = False
+def handle(sig, frame):
+    global stop
+    logging.info(f"Received signal {sig}, stopping runner...")
+    stop = True
+
+for s in (signal.SIGINT, signal.SIGTERM):
+    signal.signal(s, handle)
+
+def run_once():
+    args = ["getmail", "--getmaildir", GETMAILDIR]
+    for job in JOBS:
+        args += ["-r", f"{CONFIG_DIR}/{job}"]
+    logging.info(f"Running getmail with jobs: {JOBS}")
+    try:
+        rc = subprocess.call(args, stdout=sys.stdout, stderr=sys.stderr)
+        logging.info(f"getmail exited with code {rc}")
+        return rc
+    except Exception as e:
+        logging.error(f"Error running getmail: {e}")
+        return 1
+
+logging.info("Starting getmail runner...")
+while not stop:
+    rc = run_once()
+    for _ in range(INTERVAL):
+        if stop: break
+        time.sleep(1)
+logging.info("Exiting getmail runner.")
+sys.exit(0)