1 files changed, 43 insertions, 0 deletions

diff --git a/src/mailman/database/schema/helpers.py b/src/mailman/database/schema/helpers.py
new file mode 100644
index 000000000..c8638a12a
--- /dev/null
+++ b/src/mailman/database/schema/helpers.py
@@ -0,0 +1,43 @@
+# Copyright (C) 2013 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Schema migration helpers."""
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+__metaclass__ = type
+__all__ = [
+    'make_listid',
+    ]
+
+
+
+def make_listid(fqdn_listname):
+    """Turn a FQDN list name into a List-ID."""
+    list_name, at, mail_host = fqdn_listname.partition('@')
+    if at == '':
+        # If there is no @ sign in the value, assume it already contains the
+        # list-id.
+        return fqdn_listname
+    return '{0}.{1}'.format(list_name, mail_host)
+
+
+
+def pivot(store, table_name):
+    """Pivot a backup table into the real table name."""
+    store.execute('DROP TABLE {}'.format(table_name))
+    store.execute('ALTER TABLE {0}_backup RENAME TO {0}'.format(table_name))