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

(cherry picked from commit 26740a8d583f64dc0a27b59dd4ae303056972c0b)

1 files changed, 38 insertions, 56 deletions

diff --git a/src/migration-scripts/flow-accounting/0-to-1 b/src/migration-scripts/flow-accounting/0-to-1
index 0f790fd9c..77670e3ef 100755..100644
--- a/src/migration-scripts/flow-accounting/0-to-1
+++ b/src/migration-scripts/flow-accounting/0-to-1
@@ -1,69 +1,51 @@
-#!/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/>.
 
 # T4099: flow-accounting: sync "source-ip" and "source-address" between netflow
 #        and sflow ion CLI
 # T4105: flow-accounting: drop "sflow agent-address auto"
 
-from sys import argv
 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 = ['system', 'flow-accounting']
-config = ConfigTree(config_file)
-
-if not config.exists(base):
-    # Nothing to do
-    exit(0)
-
-# T4099
-tmp = base + ['netflow', 'source-ip']
-if config.exists(tmp):
-    config.rename(tmp, 'source-address')
-
-# T4105
-tmp = base + ['sflow', 'agent-address']
-if config.exists(tmp):
-    value = config.return_value(tmp)
-    if value == 'auto':
-        # delete the "auto"
-        config.delete(tmp)
-
-        # 1) check if BGP router-id is set
-        # 2) check if OSPF router-id is set
-        # 3) check if OSPFv3 router-id is set
-        router_id = None
-        for protocol in ['bgp', 'ospf', 'ospfv3']:
-            if config.exists(['protocols', protocol, 'parameters', 'router-id']):
-                router_id = config.return_value(['protocols', protocol, 'parameters', 'router-id'])
-                break
-        if router_id:
-            config.set(tmp, value=router_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):
+        # Nothing to do
+        return
+
+    # T4099
+    tmp = base + ['netflow', 'source-ip']
+    if config.exists(tmp):
+        config.rename(tmp, 'source-address')
+
+    # T4105
+    tmp = base + ['sflow', 'agent-address']
+    if config.exists(tmp):
+        value = config.return_value(tmp)
+        if value == 'auto':
+            # delete the "auto"
+            config.delete(tmp)
+
+            # 1) check if BGP router-id is set
+            # 2) check if OSPF router-id is set
+            # 3) check if OSPFv3 router-id is set
+            router_id = None
+            for protocol in ['bgp', 'ospf', 'ospfv3']:
+                if config.exists(['protocols', protocol, 'parameters', 'router-id']):
+                    router_id = config.return_value(['protocols', protocol, 'parameters', 'router-id'])
+                    break
+            if router_id:
+                config.set(tmp, value=router_id)