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

(cherry picked from commit 26740a8d583f64dc0a27b59dd4ae303056972c0b)

1 files changed, 15 insertions, 32 deletions

diff --git a/src/migration-scripts/dhcpv6-server/0-to-1 b/src/migration-scripts/dhcpv6-server/0-to-1
index deae1ca29..fd9b2d739 100755..100644
--- a/src/migration-scripts/dhcpv6-server/0-to-1
+++ b/src/migration-scripts/dhcpv6-server/0-to-1
@@ -1,39 +1,29 @@
-#!/usr/bin/env python3
+# Copyright 202-2024 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/>.
 
 # combine both sip-server-address and sip-server-name nodes to common sip-server
 
-from sys import argv, exit
 from vyos.configtree import ConfigTree
 
-if len(argv) < 2:
-    print("Must specify file name!")
-    exit(1)
-
-file_name = argv[1]
+base = ['service', 'dhcpv6-server', 'shared-network-name']
 
-with open(file_name, 'r') as f:
-    config_file = f.read()
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
 
-config = ConfigTree(config_file)
-base = ['service', 'dhcpv6-server', 'shared-network-name']
-if not config.exists(base):
-    # Nothing to do
-    exit(0)
-else:
     # we need to run this for every configured network
     for network in config.list_nodes(base):
         for subnet in config.list_nodes(base + [network, 'subnet']):
@@ -52,10 +42,3 @@ else:
             # Write new CLI value for sip-server
             for server in sip_server:
                 config.set(base + [network, 'subnet', subnet, 'sip-server'], value=server, 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))
-        exit(1)