is_ubuntu: "'${ansible_distribution}' == 'Ubuntu'"
is_debian: "'${ansible_distribution}' == 'Debian'"
is_debian_or_ubuntu: "'${ansible_distribution}' in ['Ubuntu', 'Debian']"
is_centos: "'${ansible_distribution}' == 'CentOS'"
is_ubuntu_precise: "$is_debian_or_ubuntu and '${ansible_distribution_release}' == 'precise'"
is_ubuntu_raring: "$is_debian_or_ubuntu and '${ansible_distribution_release}' == 'raring'"