1 files changed, 20 insertions, 37 deletions
diff --git a/src/migration-scripts/interfaces/21-to-22 b/src/migration-scripts/interfaces/21-to-22
index 1838eb1c0..046eb10c6 100755..100644
--- a/src/migration-scripts/interfaces/21-to-22
+++ b/src/migration-scripts/interfaces/21-to-22
@@ -1,46 +1,29 @@
-#!/usr/bin/env python3
+# Copyright 2021-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2021 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.
+# 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 General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# 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/>.
 
-from sys import argv
 from vyos.configtree import ConfigTree
 
-if len(argv) < 2:
-    print("Must specify file name!")
-    exit(1)
-
-file_name = argv[1]
-with open(file_name, 'r') as f:
-    config_file = f.read()
-
-config = ConfigTree(config_file)
-base = ['interfaces', 'tunnel']
-
-if not config.exists(base):
-    exit(0)
+def migrate(config: ConfigTree) -> None:
+    base = ['interfaces', 'tunnel']
 
-for interface in config.list_nodes(base):
-    path = base + [interface, 'dhcp-interface']
-    if config.exists(path):
-        tmp = config.return_value(path)
-        config.delete(path)
-        config.set(base + [interface, 'source-interface'], value=tmp)
+    if not config.exists(base):
+        return
 
-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))
-    exit(1)
+    for interface in config.list_nodes(base):
+        path = base + [interface, 'dhcp-interface']
+        if config.exists(path):
+            tmp = config.return_value(path)
+            config.delete(path)
+            config.set(base + [interface, 'source-interface'], value=tmp)