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# Copyright 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/>.
# Delete 'vpp settings nat44 no-forwarding'
# because it will be set automatically (T7972)
from vyos.configtree import ConfigTree
base = ['vpp', 'settings', 'nat44']
def migrate(config: ConfigTree) -> None:
if config.exists(base + ['no-forwarding']):
# Delete no-forwarding option from NAT44 settings
config.delete(base + ['no-forwarding'])
if config.exists(base) and len(config.list_nodes(base)) == 0:
config.delete(base)
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