Merge pull request #3692 from jestabro/revise-migration

T6007: revise migration system

1 files changed, 31 insertions, 51 deletions

diff --git a/src/migration-scripts/quagga/9-to-10 b/src/migration-scripts/quagga/9-to-10
index 3731762f7..4ac1f0b7d 100755..100644
--- a/src/migration-scripts/quagga/9-to-10
+++ b/src/migration-scripts/quagga/9-to-10
@@ -1,62 +1,42 @@
-#!/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/>.
 
 # re-organize route-map as-path
 
-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', 'route-map']
 
-config = ConfigTree(config_file)
-if not config.exists(base):
-    # Nothing to do
-    exit(0)
-
-for route_map in config.list_nodes(base):
-    # Bail out Early
-    if not config.exists(base + [route_map, 'rule']):
-        continue
-
-    for rule in config.list_nodes(base + [route_map, 'rule']):
-        rule_base = base + [route_map, 'rule', rule]
-        if config.exists(rule_base + ['set', 'as-path-exclude']):
-            tmp = config.return_value(rule_base + ['set', 'as-path-exclude'])
-            config.delete(rule_base + ['set', 'as-path-exclude'])
-            config.set(rule_base + ['set', 'as-path', 'exclude'], value=tmp)
-
-        if config.exists(rule_base + ['set', 'as-path-prepend']):
-            tmp = config.return_value(rule_base + ['set', 'as-path-prepend'])
-            config.delete(rule_base + ['set', 'as-path-prepend'])
-            config.set(rule_base + ['set', 'as-path', 'prepend'], value=tmp)
-
-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 route_map in config.list_nodes(base):
+        # Bail out Early
+        if not config.exists(base + [route_map, 'rule']):
+            continue
+
+        for rule in config.list_nodes(base + [route_map, 'rule']):
+            rule_base = base + [route_map, 'rule', rule]
+            if config.exists(rule_base + ['set', 'as-path-exclude']):
+                tmp = config.return_value(rule_base + ['set', 'as-path-exclude'])
+                config.delete(rule_base + ['set', 'as-path-exclude'])
+                config.set(rule_base + ['set', 'as-path', 'exclude'], value=tmp)
+
+            if config.exists(rule_base + ['set', 'as-path-prepend']):
+                tmp = config.return_value(rule_base + ['set', 'as-path-prepend'])
+                config.delete(rule_base + ['set', 'as-path-prepend'])
+                config.set(rule_base + ['set', 'as-path', 'prepend'], value=tmp)