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

(cherry picked from commit 26740a8d583f64dc0a27b59dd4ae303056972c0b)

1 files changed, 41 insertions, 60 deletions

diff --git a/src/migration-scripts/ntp/1-to-2 b/src/migration-scripts/ntp/1-to-2
index fd1f15d91..fd7b08221 100755..100644
--- a/src/migration-scripts/ntp/1-to-2
+++ b/src/migration-scripts/ntp/1-to-2
@@ -1,72 +1,53 @@
-#!/usr/bin/env python3
-
-# Copyright (C) 2023 VyOS maintainers and contributors
+# Copyright 2023-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# 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 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 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/>.
 
 # T3008: move from ntpd to chrony and migrate "system ntp" to "service ntp"
 
-import sys
-
 from vyos.configtree import ConfigTree
 
-if len(sys.argv) < 2:
-    print("Must specify file name!")
-    sys.exit(1)
-
-file_name = sys.argv[1]
-
-with open(file_name, 'r') as f:
-    config_file = f.read()
-
-config = ConfigTree(config_file)
-
 base_path = ['system', 'ntp']
 new_base_path = ['service', 'ntp']
-if not config.exists(base_path):
-    # Nothing to do
-    sys.exit(0)
-
-# config.copy does not recursively create a path, so create ['service'] if
-# it doesn't yet exist, such as for config.boot.default
-if not config.exists(['service']):
-    config.set(['service'])
-
-# copy "system ntp" to "service ntp"
-config.copy(base_path, new_base_path)
-config.delete(base_path)
-
-# chrony does not support the preempt option, drop it
-for server in config.list_nodes(new_base_path + ['server']):
-    server_base =  new_base_path + ['server', server]
-    if config.exists(server_base + ['preempt']):
-        config.delete(server_base + ['preempt'])
-
-# Rename "allow-clients" -> "allow-client"
-if config.exists(new_base_path + ['allow-clients']):
-    config.rename(new_base_path + ['allow-clients'], 'allow-client')
-
-# By default VyOS 1.3 allowed NTP queries for all networks - in chrony we
-# explicitly disable this behavior and clients need to be specified using the
-# allow-client CLI option. In order to be fully backwards compatible, we specify
-# 0.0.0.0/0 and ::/0 as allow networks if not specified otherwise explicitly.
-if not config.exists(new_base_path + ['allow-client']):
-    config.set(new_base_path + ['allow-client', 'address'], value='0.0.0.0/0', replace=False)
-    config.set(new_base_path + ['allow-client', 'address'], value='::/0', 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))
-    sys.exit(1)
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base_path):
+        # Nothing to do
+        return
+
+    # config.copy does not recursively create a path, so create ['service'] if
+    # it doesn't yet exist, such as for config.boot.default
+    if not config.exists(['service']):
+        config.set(['service'])
+
+    # copy "system ntp" to "service ntp"
+    config.copy(base_path, new_base_path)
+    config.delete(base_path)
+
+    # chrony does not support the preempt option, drop it
+    for server in config.list_nodes(new_base_path + ['server']):
+        server_base =  new_base_path + ['server', server]
+        if config.exists(server_base + ['preempt']):
+            config.delete(server_base + ['preempt'])
+
+    # Rename "allow-clients" -> "allow-client"
+    if config.exists(new_base_path + ['allow-clients']):
+        config.rename(new_base_path + ['allow-clients'], 'allow-client')
+
+    # By default VyOS 1.3 allowed NTP queries for all networks - in chrony we
+    # explicitly disable this behavior and clients need to be specified using the
+    # allow-client CLI option. In order to be fully backwards compatible, we specify
+    # 0.0.0.0/0 and ::/0 as allow networks if not specified otherwise explicitly.
+    if not config.exists(new_base_path + ['allow-client']):
+        config.set(new_base_path + ['allow-client', 'address'], value='0.0.0.0/0', replace=False)
+        config.set(new_base_path + ['allow-client', 'address'], value='::/0', replace=False)