appdir="/home/dan/Workarea/apps"
vam_apps = ['cmsproxy', 'cmsvam', 'idontexist', 'cmsvamdata', 'vcmdata']
rel = {}
vam_apps.each do |comp|
    rel[comp] = File.readlink("#{appdir}/#{comp}/release")
end
Facter.add(:vam) {
    setcode { rel.to_s }
}