puppet fact for rpm _packages

rpm_packages.rb

require 'facter'

def hash_tree
  Hash.new do |hash, key|
    hash[key] = hash_tree
  end
end

Facter.add(:packages) do
  confine :osfamily => 'Redhat'
  setcode do
    package_data = Facter::Util::Resolution::exec('rpm --query --all --qf "%{NAME}||%{VERSION}\n"')
    @packages = hash_tree
    package_data.split("\n").each do |line|
      package_name, package_version = line.split("||")
      @packages[package_name] = package_version
    end
    @packages
  end
end