Conditional package naming in puppet

packages.pp

$updatecommand = $osfamily ? {
  'Debian' => 'apt-get update && apt-get upgrade',
  'RedHat' => 'yum update',
  'Suse'   => 'zypper update',
}

exec { "update_packages":
  command => $updatecommand,
  path    => "/usr/local/bin/:/bin/",
}