set_vra_prop.rb

require 'json'
require 'tempfile'

fact_to_change = ARGV.shift
new_value = ARGV.shift

vra_facts_file_path = "/etc/puppetlabs/facter/facts.d/puppet_vra_facts.json"
vra_facts = JSON.parse(%x(/opt/puppetlabs/bin/facter puppet_vra_properties -j))
vra_prop = "Puppet.VRA.Prop.#{fact_to_change}"
vra_facts["puppet_vra_properties"][vra_prop] = new_value

file = Tempfile.new('vra_facts')
file.write(vra_facts.to_json)
file.close

%x(cp #{file.path} #{vra_facts_file_path})

file.unlink