migration: T6007: convert all migration scripts to load as module

1 files changed, 15 insertions, 34 deletions

diff --git a/src/migration-scripts/dns-forwarding/0-to-1 b/src/migration-scripts/dns-forwarding/0-to-1
index 7f4343652..264ffb40d 100755..100644
--- a/src/migration-scripts/dns-forwarding/0-to-1
+++ b/src/migration-scripts/dns-forwarding/0-to-1
@@ -1,50 +1,31 @@
-#!/usr/bin/env python3
+# Copyright 2019-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2019 VyOS maintainers and contributors
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 or later as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
+# This library 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
 #
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 # This migration script will check if there is a allow-from directive configured
 # for the dns forwarding service - if not, the node will be created with the old
 # default values of 0.0.0.0/0 and ::/0
 
-import sys
 from vyos.configtree import ConfigTree
 
-if len(sys.argv) < 2:
-    print("Must specify file name!")
-    sys.exit(1)
-
-file_name = sys.argv[1]
-
-with open(file_name, 'r') as f:
-    config_file = f.read()
+base = ['service', 'dns', 'forwarding']
 
-config = ConfigTree(config_file)
+def migrate(config: ConfigTree)-> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
 
-base = ['service', 'dns', 'forwarding']
-if not config.exists(base):
-    # Nothing to do
-    sys.exit(0)
-else:
     if not config.exists(base + ['allow-from']):
         config.set(base + ['allow-from'], value='0.0.0.0/0', replace=False)
         config.set(base + ['allow-from'], value='::/0', replace=False)
-
-    try:
-        with open(file_name, 'w') as f:
-            f.write(config.to_string())
-    except OSError as e:
-        print("Failed to save the modified config: {}".format(e))
-        sys.exit(1)