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

(cherry picked from commit 26740a8d583f64dc0a27b59dd4ae303056972c0b)

1 files changed, 15 insertions, 35 deletions

diff --git a/src/migration-scripts/conntrack-sync/1-to-2 b/src/migration-scripts/conntrack-sync/1-to-2
index a8e1007f3..3e10e98c3 100755..100644
--- a/src/migration-scripts/conntrack-sync/1-to-2
+++ b/src/migration-scripts/conntrack-sync/1-to-2
@@ -1,44 +1,31 @@
-#!/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/>.
 
 # VyOS 1.2 crux allowed configuring a lower or upper case loglevel. This
 # is no longer supported as the input data is validated and will lead to
 # an error. If user specifies an upper case logleve, make it lowercase
 
-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()
-
 base = ['service', 'conntrack-sync']
-config = ConfigTree(config_file)
 
-if not config.exists(base):
-    # Nothing to do
-    exit(0)
-else:
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
+
     base_accept_proto = base + ['accept-protocol']
     if config.exists(base_accept_proto):
         tmp = config.return_value(base_accept_proto)
@@ -57,10 +44,3 @@ else:
     base_cluster = base + ['failover-mechanism', 'cluster']
     if config.exists(base_cluster):
         config.delete(base_cluster)
-
-    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)