defaults = {
    'apt': {
        'packages': {
            'isc-dhcp-server': {},
        },
    },
}


@metadata_reactor
def get_static_allocations(metadata):
    allocations = {}
    for rnode in repo.nodes_in_group('home'):
        for identifier, interface in rnode.metadata.get('interfaces', {}).items():
            if interface.get('dhcp', False):
                allocations[rnode.name] = {
                        'ipv4':  sorted(interface['ips'])[0],
                        'mac': interface['mac'],
                }
    return {
        'dhcpd': {
            'fixed_allocations': allocations,
        }
    }

@metadata_reactor
def get_listen_interfaces(metadata):
    listen_interfaces = []
    for identfier, subnet in node.metadata.get('dhcpd/subnets', {}).items():
        listen_interfaces.append(subnet.get('interface'))

    return {
        'dhcpd': {
            'listen_interfaces': ' '.join(sorted(listen_interfaces)),
        }
    }