define puppet::defines::env_fact ($value, $factname = '', $ensure = 'present') {
  $factname_real = $factname ? {
    ''      => upcase($name),
    default => upcase($factname)
  }

  if defined(Exec['create-env_fact.sh']) {
    debug('already defined.')
  } else {
    exec { 'create-env_fact.sh':
      command => 'echo \'#/bin/sh\n\' >>/etc/profile.d/env_facts.sh && chmod a+xr /etc/profile.d/env_facts.sh',
      onlyif  => 'test ! -e /etc/profile.d/env_facts.sh',
      before  => Line["env_fact-${factname_real}"],
      path    => ['/usr/bin', '/bin'],
    }
  }

  common::line { "env_fact-${factname_real}":
    ensure => $ensure,
    line   => "export FACTER_${factname_real}=${value}",
    file   => '/etc/profile.d/env_facts.sh',
  }
}