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

(cherry picked from commit 26740a8d583f64dc0a27b59dd4ae303056972c0b)

1 files changed, 77 insertions, 95 deletions

diff --git a/src/migration-scripts/pppoe-server/6-to-7 b/src/migration-scripts/pppoe-server/6-to-7
index d51c1c9d8..79745a0c6 100755..100644
--- a/src/migration-scripts/pppoe-server/6-to-7
+++ b/src/migration-scripts/pppoe-server/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/>.
 
 # - move all pool to named pools
 #       'start-stop' migrate to namedpool 'default-range-pool'
@@ -24,94 +23,77 @@
 #       If there are not named pools, namedless pool will be default.
 #       2. If authentication mode = 'radius' then namedless pool will be default
 
-from sys import argv
-from sys import exit
 from vyos.configtree import ConfigTree
 from vyos.base import Warning
 
-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)
 base = ['service', 'pppoe-server']
 pool_base = base + ['client-ip-pool']
-if not config.exists(base):
-    exit(0)
-
-if not config.exists(pool_base):
-    exit(0)
-
-default_pool = ''
-range_pool_name = 'default-range-pool'
-
-#Default nameless pools migrations
-if config.exists(pool_base + ['start']) and config.exists(pool_base + ['stop']):
-    def is_legalrange(ip1: str, ip2: str, mask: str):
-        from ipaddress import IPv4Interface
-        interface1 = IPv4Interface(f'{ip1}/{mask}')
-        interface2 = IPv4Interface(f'{ip2}/{mask}')
-        return interface1.network.network_address == interface2.network.network_address and interface2.ip > interface1.ip
 
-    start_ip = config.return_value(pool_base + ['start'])
-    stop_ip = config.return_value(pool_base + ['stop'])
-    if is_legalrange(start_ip, stop_ip, '24'):
-        ip_range = f'{start_ip}-{stop_ip}'
-        config.set(pool_base + [range_pool_name, 'range'], value=ip_range, replace=False)
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        return
+
+    if not config.exists(pool_base):
+        return
+
+    default_pool = ''
+    range_pool_name = 'default-range-pool'
+
+    #Default nameless pools migrations
+    if config.exists(pool_base + ['start']) and config.exists(pool_base + ['stop']):
+        def is_legalrange(ip1: str, ip2: str, mask: str):
+            from ipaddress import IPv4Interface
+            interface1 = IPv4Interface(f'{ip1}/{mask}')
+            interface2 = IPv4Interface(f'{ip2}/{mask}')
+            return interface1.network.network_address == interface2.network.network_address and interface2.ip > interface1.ip
+
+        start_ip = config.return_value(pool_base + ['start'])
+        stop_ip = config.return_value(pool_base + ['stop'])
+        if is_legalrange(start_ip, stop_ip, '24'):
+            ip_range = f'{start_ip}-{stop_ip}'
+            config.set(pool_base + [range_pool_name, 'range'], value=ip_range, replace=False)
+            default_pool = range_pool_name
+        else:
+            Warning(
+                f'PPPoE client-ip-pool range start-ip:{start_ip} and stop-ip:{stop_ip} can not be migrated.')
+        config.delete(pool_base + ['start'])
+        config.delete(pool_base + ['stop'])
+
+    if config.exists(pool_base + ['subnet']):
         default_pool = range_pool_name
-    else:
-        Warning(
-            f'PPPoE client-ip-pool range start-ip:{start_ip} and stop-ip:{stop_ip} can not be migrated.')
-    config.delete(pool_base + ['start'])
-    config.delete(pool_base + ['stop'])
-
-if config.exists(pool_base + ['subnet']):
-    default_pool = range_pool_name
-    for subnet in config.return_values(pool_base + ['subnet']):
-        config.set(pool_base + [range_pool_name, 'range'], value=subnet, replace=False)
-    config.delete(pool_base + ['subnet'])
-
-gateway = ''
-if config.exists(base + ['gateway-address']):
-    gateway = config.return_value(base + ['gateway-address'])
-
-#named pool migration
-namedpools_base = pool_base + ['name']
-if config.exists(namedpools_base):
-    if config.exists(base + ['authentication', 'mode']):
-        if config.return_value(base + ['authentication', 'mode']) == 'local':
-            if config.list_nodes(namedpools_base):
-                default_pool = config.list_nodes(namedpools_base)[0]
-
-    for pool_name in config.list_nodes(namedpools_base):
-        pool_path = namedpools_base + [pool_name]
-        if config.exists(pool_path + ['subnet']):
-            subnet = config.return_value(pool_path + ['subnet'])
-            config.set(pool_base + [pool_name, 'range'], value=subnet, replace=False)
-        if config.exists(pool_path + ['next-pool']):
-            next_pool = config.return_value(pool_path + ['next-pool'])
-            config.set(pool_base + [pool_name, 'next-pool'], value=next_pool)
-        if not gateway:
-            if config.exists(pool_path + ['gateway-address']):
-                gateway = config.return_value(pool_path + ['gateway-address'])
-
-    config.delete(namedpools_base)
-
-if gateway:
-    config.set(base + ['gateway-address'], value=gateway)
-if default_pool:
-    config.set(base + ['default-pool'], value=default_pool)
-# format as tag node
-config.set_tag(pool_base)
-
-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)
+        for subnet in config.return_values(pool_base + ['subnet']):
+            config.set(pool_base + [range_pool_name, 'range'], value=subnet, replace=False)
+        config.delete(pool_base + ['subnet'])
+
+    gateway = ''
+    if config.exists(base + ['gateway-address']):
+        gateway = config.return_value(base + ['gateway-address'])
+
+    #named pool migration
+    namedpools_base = pool_base + ['name']
+    if config.exists(namedpools_base):
+        if config.exists(base + ['authentication', 'mode']):
+            if config.return_value(base + ['authentication', 'mode']) == 'local':
+                if config.list_nodes(namedpools_base):
+                    default_pool = config.list_nodes(namedpools_base)[0]
+
+        for pool_name in config.list_nodes(namedpools_base):
+            pool_path = namedpools_base + [pool_name]
+            if config.exists(pool_path + ['subnet']):
+                subnet = config.return_value(pool_path + ['subnet'])
+                config.set(pool_base + [pool_name, 'range'], value=subnet, replace=False)
+            if config.exists(pool_path + ['next-pool']):
+                next_pool = config.return_value(pool_path + ['next-pool'])
+                config.set(pool_base + [pool_name, 'next-pool'], value=next_pool)
+            if not gateway:
+                if config.exists(pool_path + ['gateway-address']):
+                    gateway = config.return_value(pool_path + ['gateway-address'])
+
+        config.delete(namedpools_base)
+
+    if gateway:
+        config.set(base + ['gateway-address'], value=gateway)
+    if default_pool:
+        config.set(base + ['default-pool'], value=default_pool)
+    # format as tag node
+    config.set_tag(pool_base)