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

(cherry picked from commit 26740a8d583f64dc0a27b59dd4ae303056972c0b)

1 files changed, 39 insertions, 59 deletions

diff --git a/src/migration-scripts/policy/6-to-7 b/src/migration-scripts/policy/6-to-7
index cdefc6837..69aa703c5 100755..100644
--- a/src/migration-scripts/policy/6-to-7
+++ b/src/migration-scripts/policy/6-to-7
@@ -1,18 +1,17 @@
-#!/usr/bin/env python3
+# Copyright 2023-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2023-2024 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/>.
 
 # T5729: Switch to valueless whenever is possible.
 # From
@@ -22,55 +21,36 @@
     # set policy [route | route6] ... rule <rule> log
     # Remove command if log=disable
 
-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 = ['policy']
-config = ConfigTree(config_file)
-
-if not config.exists(base):
-    # Nothing to do
-    exit(0)
-
-for family in ['route', 'route6']:
-    if config.exists(base + [family]):
-
-        for policy_name in config.list_nodes(base + [family]):
-            if config.exists(base + [family, policy_name, 'rule']):
-                for rule in config.list_nodes(base + [family, policy_name, 'rule']):
-                    # Log
-                    if config.exists(base + [family, policy_name, 'rule', rule, 'log']):
-                        log_value = config.return_value(base + [family, policy_name, 'rule', rule, 'log'])
-                        config.delete(base + [family, policy_name, 'rule', rule, 'log'])
-                        if log_value == 'enable':
-                            config.set(base + [family, policy_name, 'rule', rule, 'log'])
-                    # State
-                    if config.exists(base + [family, policy_name, 'rule', rule, 'state']):
-                        flag_enable = 'False'
-                        for state in ['established', 'invalid', 'new', 'related']:
-                            if config.exists(base + [family, policy_name, 'rule', rule, 'state', state]):
-                                state_value = config.return_value(base + [family, policy_name, 'rule', rule, 'state', state])
-                                config.delete(base + [family, policy_name, 'rule', rule, 'state', state])
-                                if state_value == 'enable':
-                                    config.set(base + [family, policy_name, 'rule', rule, 'state'], value=state, replace=False)
-                                    flag_enable = 'True'
-                        if flag_enable == 'False':
-                            config.delete(base + [family, policy_name, 'rule', rule, 'state'])
 
-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
+
+    for family in ['route', 'route6']:
+        if config.exists(base + [family]):
+
+            for policy_name in config.list_nodes(base + [family]):
+                if config.exists(base + [family, policy_name, 'rule']):
+                    for rule in config.list_nodes(base + [family, policy_name, 'rule']):
+                        # Log
+                        if config.exists(base + [family, policy_name, 'rule', rule, 'log']):
+                            log_value = config.return_value(base + [family, policy_name, 'rule', rule, 'log'])
+                            config.delete(base + [family, policy_name, 'rule', rule, 'log'])
+                            if log_value == 'enable':
+                                config.set(base + [family, policy_name, 'rule', rule, 'log'])
+                        # State
+                        if config.exists(base + [family, policy_name, 'rule', rule, 'state']):
+                            flag_enable = 'False'
+                            for state in ['established', 'invalid', 'new', 'related']:
+                                if config.exists(base + [family, policy_name, 'rule', rule, 'state', state]):
+                                    state_value = config.return_value(base + [family, policy_name, 'rule', rule, 'state', state])
+                                    config.delete(base + [family, policy_name, 'rule', rule, 'state', state])
+                                    if state_value == 'enable':
+                                        config.set(base + [family, policy_name, 'rule', rule, 'state'], value=state, replace=False)
+                                        flag_enable = 'True'
+                            if flag_enable == 'False':
+                                config.delete(base + [family, policy_name, 'rule', rule, 'state'])