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

1 files changed, 35 insertions, 53 deletions

diff --git a/src/migration-scripts/l2tp/7-to-8 b/src/migration-scripts/l2tp/7-to-8
index e429ed057..527906fc8 100755..100644
--- a/src/migration-scripts/l2tp/7-to-8
+++ b/src/migration-scripts/l2tp/7-to-8
@@ -1,65 +1,47 @@
-#!/usr/bin/env python3
+# Copyright 2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 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/>.
 
 # Migrate from 'ccp-disable' to 'ppp-options.disable-ccp'
 # Migration ipv6 options
 
-from sys import argv
-from sys import exit
 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 = ['vpn', 'l2tp', 'remote-access']
-if not config.exists(base):
-    exit(0)
-
-#CCP migration
-if config.exists(base + ['ccp-disable']):
-    config.delete(base + ['ccp-disable'])
-    config.set(base + ['ppp-options', 'disable-ccp'])
-
-#IPV6 options migrations
-if config.exists(base + ['ppp-options','ipv6-peer-intf-id']):
-    intf_peer_id = config.return_value(base + ['ppp-options','ipv6-peer-intf-id'])
-    if intf_peer_id == 'ipv4':
-        intf_peer_id = 'ipv4-addr'
-    config.set(base + ['ppp-options','ipv6-peer-interface-id'], value=intf_peer_id, replace=True)
-    config.delete(base + ['ppp-options','ipv6-peer-intf-id'])
-
-if config.exists(base + ['ppp-options','ipv6-intf-id']):
-    intf_id = config.return_value(base + ['ppp-options','ipv6-intf-id'])
-    config.set(base + ['ppp-options','ipv6-interface-id'], value=intf_id, replace=True)
-    config.delete(base + ['ppp-options','ipv6-intf-id'])
-
-if config.exists(base + ['ppp-options','ipv6-accept-peer-intf-id']):
-    config.set(base + ['ppp-options','ipv6-accept-peer-interface-id'])
-    config.delete(base + ['ppp-options','ipv6-accept-peer-intf-id'])
 
-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)
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        return
+
+    #CCP migration
+    if config.exists(base + ['ccp-disable']):
+        config.delete(base + ['ccp-disable'])
+        config.set(base + ['ppp-options', 'disable-ccp'])
+
+    #IPV6 options migrations
+    if config.exists(base + ['ppp-options','ipv6-peer-intf-id']):
+        intf_peer_id = config.return_value(base + ['ppp-options','ipv6-peer-intf-id'])
+        if intf_peer_id == 'ipv4':
+            intf_peer_id = 'ipv4-addr'
+        config.set(base + ['ppp-options','ipv6-peer-interface-id'], value=intf_peer_id, replace=True)
+        config.delete(base + ['ppp-options','ipv6-peer-intf-id'])
+
+    if config.exists(base + ['ppp-options','ipv6-intf-id']):
+        intf_id = config.return_value(base + ['ppp-options','ipv6-intf-id'])
+        config.set(base + ['ppp-options','ipv6-interface-id'], value=intf_id, replace=True)
+        config.delete(base + ['ppp-options','ipv6-intf-id'])
+
+    if config.exists(base + ['ppp-options','ipv6-accept-peer-intf-id']):
+        config.set(base + ['ppp-options','ipv6-accept-peer-interface-id'])
+        config.delete(base + ['ppp-options','ipv6-accept-peer-intf-id'])