augeas/augtool + puppet update /etc/hosts file

gistfile1.pp

    $puppetmaster_ip = '8.8.8.8'
    augeas { "puppetmaster_in_hosts_append":
        context => "/files/etc/hosts",
        changes => [
            "set 01/ipaddr '${puppetmaster_ip}'",
            "set 01/canonical puppet",
        ],
        onlyif => "match *[ipaddr = '${puppetmaster_ip}'] size == 0"
    } -> augeas { "puppetmaster_in_hosts_update":
        context => "/files/etc/hosts",
        changes => [
            "set *[ipaddr = '${puppetmaster_ip}']/canonical puppet",
        ],
        onlyif => "match *[ipaddr = '${puppetmaster_ip}'] size > 0",
        require => Augeas["puppetmaster_in_hosts_append"];
    }