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

(cherry picked from commit 26740a8d583f64dc0a27b59dd4ae303056972c0b)

1 files changed, 25 insertions, 42 deletions

diff --git a/src/migration-scripts/interfaces/26-to-27 b/src/migration-scripts/interfaces/26-to-27
index 429ab650f..3f58de02c 100755..100644
--- a/src/migration-scripts/interfaces/26-to-27
+++ b/src/migration-scripts/interfaces/26-to-27
@@ -1,52 +1,35 @@
-#!/usr/bin/env python3
+# Copyright 2022-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2022-2024 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/>.
 
 # T4384: pppoe: replace default-route CLI option with common CLI nodes already
 #        present for DHCP
 
-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()
-
-base = ['interfaces', 'pppoe']
-config = ConfigTree(config_file)
-
-if not config.exists(base):
-    exit(0)
-
-for ifname in config.list_nodes(base):
-    tmp_config = base + [ifname, 'default-route']
-    if config.exists(tmp_config):
-        # Retrieve current config value
-        value = config.return_value(tmp_config)
-        # Delete old Config node
-        config.delete(tmp_config)
-        if value == 'none':
-            config.set(base + [ifname, 'no-default-route'])
-
-try:
-    with open(file_name, 'w') as f:
-        f.write(config.to_string())
-except OSError as e:
-    print(f'Failed to save the modified config: {e}')
-    exit(1)
+def migrate(config: ConfigTree) -> None:
+    base = ['interfaces', 'pppoe']
+
+    if not config.exists(base):
+        return
+
+    for ifname in config.list_nodes(base):
+        tmp_config = base + [ifname, 'default-route']
+        if config.exists(tmp_config):
+            # Retrieve current config value
+            value = config.return_value(tmp_config)
+            # Delete old Config node
+            config.delete(tmp_config)
+            if value == 'none':
+                config.set(base + [ifname, 'no-default-route'])