require 'open3'

dir = 'C:\test'
command = 'test.bat'


Dir.chdir(dir) do
  puts "[+] starting"
  Open3.popen3(command) do |stdin, stdout, stderr, wait_thr|
    while line = stdout.gets
      puts line
      if /pause$/ =~ line
        puts "[+] Pause detected, hitting enter"
        stdin.puts("{ENTER}")
      end
      stdout.flush()
    end
    puts "[+] Finished"
  end
end