module-apt/manifests/unattended_upgrades.pp

class apt::unattended_upgrades {

  package { 'unattended-upgrades':
    ensure  => present,
    require => undef,
  }

  apt_conf { '50unattended-upgrades':
    source  => [
                "puppet:///modules/site_apt/${::lsbdistcodename}/50unattended-upgrades",
                'puppet:///modules/site_apt/50unattended-upgrades',
                "puppet:///modules/apt/${::lsbdistcodename}/50unattended-upgrades" ],
    require => Package['unattended-upgrades'],
  }

  if $apt::custom_preferences != false {
    Apt_conf['50unattended-upgrades'] {
      before => Concat['apt_config'],
    }
  }
}