Facter to set facts of versions installed

packagefacts.rb

require 'puppet'
require 'puppet/application'
require 'facter'

typeobj = Puppet::Type.type("package")
properties = typeobj.properties.collect { |s| s.name }
format = proc {|trans|
    trans.dup.collect do |param, value|
        if value.nil? or value.to_s.empty?
            trans.delete(param)
        elsif value.to_s == "absent" and param.to_s != "ensure"
            trans.delete(param)
        end
        unless properties.include?(param)
            trans.delete(param)
        end
    end
        Facter.add(trans.name) do
          setcode do
                trans.to_hash[:ensure]
          end
        end
}

values = typeobj.instances.collect do |obj|
            trans = obj.to_trans(true)
            format.call(trans)
        end