previous debugging failed; trying again

  include stdlib

  define print_install() {

    notice("Installing ${name}")

  }

  define print_uninstall() {

    notice("Uninstalling ${name}")

  }

  $only_install = difference($install, $uninstall)

  print_install{$only_install: }

  print_uninstall{$uninstall: }

  $installing = join($only_install, ', ')

  $unintalling = join($uninstall, ', ')

  notice("Installing ${installing}")

  notice("Uninstalling ${uninstalling}")

  ensure_packages($only_install, {'ensure' => 'latest'})

  ensure_packages($uninstall, {'ensure' => 'absent'})