Download latest SSL certificate and setup environment to make it accessible for Ruby

configure_ssl.rake

task :configure_ssl do
  puts 'configure SSL'

  cacert_file = File.join(Dir.tmpdir, 'cacert.pem')

  if File.exist?(cacert_file)
    puts "Used #{cacert_file} bundle of certificate authorities"
  else
    Net::HTTP.start("curl.haxx.se") do |http|
      resp = http.get("/ca/cacert.pem")
      if resp.code == "200"
        open(cacert_file, "wb") { |file| file.write(resp.body) }
        puts "\n\nA bundle of certificate authorities has been installed to"
        puts "#{cacert_file}\n"
      else
        abort "\n\n>>>> A cacert.pem bundle could not be downloaded."
      end
    end
  end

  ENV['SSL_CERT_FILE'] = cacert_file
end