bundlewrap/bundles/cron/items.py

files = {}

directories = {
    '/etc/cron.d': {
        'purge': True,
    },
}

for crontab, content in node.metadata.get('cron', {}).items():
    files['/etc/cron.d/{}'.format(crontab)] = {
        'content': content + "\n",
    }