module-apt/manifests/update.pp

class apt::update {

  exec { 'update_apt':
    command => '/usr/bin/apt-get update && /usr/bin/apt-get autoclean',
    require => [
                File['/etc/apt/apt.conf.d', '/etc/apt/preferences' ],
                File['/etc/apt/sources.list'] ],
    loglevel => info,
    # Another Semaphor for all packages to reference
    alias => 'apt_updated'
  }

}