Merge pull request #4050 from jestabro/revise-migration-circinus

T6007: revise migration system

1 files changed, 21 insertions, 42 deletions

diff --git a/src/migration-scripts/bgp/2-to-3 b/src/migration-scripts/bgp/2-to-3
index 34d321a96..d8bc34db6 100755..100644
--- a/src/migration-scripts/bgp/2-to-3
+++ b/src/migration-scripts/bgp/2-to-3
@@ -1,51 +1,30 @@
-#!/usr/bin/env python3
+# Copyright 2022-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2022 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/>.
 
 # T4257: Discussion on changing BGP autonomous system number syntax
 
-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)
-
-# Check if BGP is even configured. Then check if local-as exists, then add the system-as, then remove the local-as. This is for global configuration.
-if config.exists(['protocols', 'bgp']):
-    if config.exists(['protocols', 'bgp', 'local-as']):
-        config.rename(['protocols', 'bgp', 'local-as'], 'system-as')
-
-# Check if vrf names are configured. Then check if local-as exists inside of a name, then add the system-as, then remove the local-as. This is for vrf configuration.
-if config.exists(['vrf', 'name']):
-    for vrf in config.list_nodes(['vrf', 'name']):
-        if config.exists(['vrf', f'name {vrf}', 'protocols', 'bgp', 'local-as']):
-            config.rename(['vrf', f'name {vrf}', 'protocols', 'bgp', 'local-as'], 'system-as')
-
-try:
-    with open(file_name, 'w') as f:
-        f.write(config.to_string())
-except OSError as e:
-    print(f'Failed to save the modified config: {e}')
-    exit(1)
+def migrate(config: ConfigTree) -> None:
+    # Check if BGP is even configured. Then check if local-as exists, then add the system-as, then remove the local-as. This is for global configuration.
+    if config.exists(['protocols', 'bgp']):
+        if config.exists(['protocols', 'bgp', 'local-as']):
+            config.rename(['protocols', 'bgp', 'local-as'], 'system-as')
+
+    # Check if vrf names are configured. Then check if local-as exists inside of a name, then add the system-as, then remove the local-as. This is for vrf configuration.
+    if config.exists(['vrf', 'name']):
+        for vrf in config.list_nodes(['vrf', 'name']):
+            if config.exists(['vrf', f'name {vrf}', 'protocols', 'bgp', 'local-as']):
+                config.rename(['vrf', f'name {vrf}', 'protocols', 'bgp', 'local-as'], 'system-as')