dumb repl in 20 lines of ruby.. todo: wrap exec maybe to crosslang?

dr.rb

#!/usr/bin/env ruby

def save_line(line)
  open('repldata', 'a') do |repldata|
    repldata.puts "puts %s(> #{line.rstrip})"
    repldata.puts "print('= ')"
    repldata.puts "puts(#{line})"
  end
end

def exec_file
  system "clear" or system "cls"
  `ruby repldata`
end

loop do
  print '> '
  save_line gets
  puts exec_file
end