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

(cherry picked from commit 26740a8d583f64dc0a27b59dd4ae303056972c0b)

1 files changed, 15 insertions, 34 deletions

diff --git a/src/migration-scripts/pppoe-server/4-to-5 b/src/migration-scripts/pppoe-server/4-to-5
index 5850db673..03fbfb247 100755..100644
--- a/src/migration-scripts/pppoe-server/4-to-5
+++ b/src/migration-scripts/pppoe-server/4-to-5
@@ -1,49 +1,30 @@
-#!/usr/bin/env python3
+# Copyright 2020-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2020 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/>.
 
 # - rename local-ip to gateway-address
 
 from vyos.configtree import ConfigTree
-from sys import argv
-from sys import exit
-
-if len(argv) < 2:
-    print("Must specify file name!")
-    exit(1)
 
-file_name = argv[1]
+base_path = ['service', 'pppoe-server']
 
-with open(file_name, 'r') as f:
-    config_file = f.read()
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base_path):
+        # Nothing to do
+        return
 
-config = ConfigTree(config_file)
-base_path = ['service', 'pppoe-server']
-if not config.exists(base_path):
-    # Nothing to do
-    exit(0)
-else:
     config_gw = base_path + ['local-ip']
     if config.exists(config_gw):
         config.rename(config_gw, 'gateway-address')
         config.delete(config_gw)
-
-    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)
-