# Copyright 2021-2024 VyOS maintainers and contributors <maintainers@vyos.io>
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# Lesser General Public License for more details.
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# T3417: migrate IS-IS tagNode to node as we can only have one IS-IS process

from vyos.configtree import ConfigTree

base = ['protocols', 'isis']

def migrate(config: ConfigTree) -> None:
    if not config.exists(base):
        # Nothing to do
        return

    # We need a temporary copy of the config
    tmp_base = ['protocols', 'isis2']
    config.copy(base, tmp_base)

    # Now it's save to delete the old configuration
    config.delete(base)

    # Rename temporary copy to new final config (IS-IS domain key is static and no
    # longer required to be set via CLI)
    config.rename(tmp_base, 'isis')