ansible-personal/roles/common/templates/tarsnap_sources.list.j2

{% if ansible_distribution_version | version_compare('18.04', '==') %}
# 2018-03-17: no Ubuntu 18.04 "bionic" packages yet, so use 17.10 "artful"
deb https://pkg.tarsnap.com/deb/artful ./
{% else %}
deb https://pkg.tarsnap.com/deb/{{ ansible_distribution_release }} ./
{% endif %}