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# Copyright 2022-2024 VyOS maintainers and contributors <maintainers@vyos.io>
#
# 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 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
# Lesser General Public License for more details.
#
# 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 vyos.configtree import ConfigTree
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')
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