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templates/mailman-hyperkitty-archiver-reconcile.py.j2

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+#!{{ mailman_bindir }}/python3
+
+"""Disable HyperKitty for Mailman lists whose archive policy is never."""
+
+import argparse
+import fcntl
+import logging
+import sys
+
+from mailman.config import config
+from mailman.core.initialize import initialize
+from mailman.interfaces.listmanager import IListManager
+from mailman.interfaces.mailinglist import IListArchiverSet
+from zope.component import getUtility
+
+
+CONFIG_FILE = {{ (mailman_conf_dir + '/mailman.cfg') | to_json }}
+LOCK_FILE = {{ mailman_hyperkitty_archiver_reconciliation_lock | to_json }}
+ARCHIVER_NAME = 'hyperkitty'
+
+
+logging.basicConfig(
+    level=logging.INFO,
+    format='mailman-hyperkitty-archiver-reconcile: %(levelname)s: %(message)s')
+LOG = logging.getLogger(__name__)
+
+
+def normalize_policy(value):
+    if hasattr(value, 'name'):
+        value = value.name
+    if isinstance(value, int):
+        return {0: 'never', 1: 'private', 2: 'public'}.get(value, str(value))
+    return str(value).strip().lower()
+
+
+def reconcile(dry_run):
+    initialize(CONFIG_FILE)
+    lists = sorted(
+        getUtility(IListManager).mailing_lists,
+        key=lambda mailing_list: mailing_list.fqdn_listname.casefold())
+    candidates = []
+
+    for mailing_list in lists:
+        if normalize_policy(mailing_list.archive_policy) != 'never':
+            continue
+        archiver = IListArchiverSet(mailing_list).get(ARCHIVER_NAME)
+        if archiver is not None and archiver.is_enabled:
+            candidates.append((mailing_list, archiver))
+
+    changed = 0
+    if dry_run:
+        for mailing_list, _archiver in candidates:
+            LOG.info(
+                'would disable %s for %s (archive policy is never)',
+                ARCHIVER_NAME, mailing_list.fqdn_listname)
+        config.db.abort()
+    else:
+        for mailing_list, archiver in candidates:
+            # Re-read both rows before changing them so a concurrent Postorius
+            # update cannot be overwritten from the initial snapshot.
+            config.db.store.refresh(mailing_list)
+            config.db.store.refresh(archiver)
+            if (normalize_policy(mailing_list.archive_policy) != 'never' or
+                    not archiver.is_enabled):
+                LOG.warning(
+                    'skipping %s: settings changed during reconciliation',
+                    mailing_list.fqdn_listname)
+                continue
+            archiver.is_enabled = False
+            changed += 1
+            LOG.info(
+                'disabled %s for %s (archive policy is never)',
+                ARCHIVER_NAME, mailing_list.fqdn_listname)
+        config.db.commit()
+
+    LOG.info(
+        '%d Core lists, %d inconsistent archiver settings, %d changed',
+        len(lists), len(candidates), changed)
+    return 0
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument(
+        '--dry-run', action='store_true',
+        help='report inconsistent lists without changing Mailman Core')
+    arguments = parser.parse_args()
+
+    try:
+        with open(LOCK_FILE, 'w') as lock_handle:
+            try:
+                fcntl.flock(lock_handle, fcntl.LOCK_EX | fcntl.LOCK_NB)
+            except OSError:
+                LOG.error('another reconciliation process holds %s', LOCK_FILE)
+                return 1
+            return reconcile(arguments.dry_run)
+    except Exception as error:
+        try:
+            config.db.abort()
+        except Exception:
+            # Preserve the original initialization or database exception.
+            pass
+        LOG.exception('reconciliation failed: %s', error)
+        return 1
+
+
+if __name__ == '__main__':
+    sys.exit(main())

templates/mailman-hyperkitty-archiver-reconcile.service.systemd.j2

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+[Unit]
+Description=Disable HyperKitty for Mailman lists with archive policy never
+After=network-online.target mailman.service
+Wants=network-online.target
+ConditionPathExists={{ mailman_conf_dir }}/mailman.cfg
+
+[Service]
+Type=oneshot
+User={{ mailman_user }}
+Group={{ mailman_user }}
+ExecStart={{ mailman_hyperkitty_archiver_reconciliation_script }}
+TimeoutStartSec=5min
+Nice=10

templates/mailman-hyperkitty-archiver-reconcile.timer.systemd.j2

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+[Unit]
+Description=Periodically reconcile Mailman and HyperKitty archive settings
+
+[Timer]
+OnActiveSec={{ mailman_hyperkitty_archiver_reconciliation_on_active }}
+OnUnitActiveSec={{ mailman_hyperkitty_archiver_reconciliation_interval }}
+AccuracySec=1min
+Persistent=false
+Unit=mailman-hyperkitty-archiver-reconcile.service
+
+[Install]
+WantedBy=timers.target