gistfile1.rbx

#!/usr/bin/env ruby

def main(args)
  memory = {}
  post_sub_regexp = /\(\([^)]+\)\)/
  input = IO.read(args[0])
  while matches = input.match(/\(\(([^)]+)\)\)/) do
    if matches[1] =~ /:/
      var, prompt = matches[1].split(":")
    elsif memory[matches[1]]
      input.sub!(post_sub_regexp, memory[matches[1]])
      next
    else
      var = nil
      prompt = matches[1]
    end

    print "Please provide #{prompt} : "
    resp = STDIN.gets.chomp

    if var
      memory[var] = resp
    end
    input.sub!(post_sub_regexp, resp)
  end
  print "\n"
  puts input
end

if __FILE__ == $PROGRAM_NAME
  main ARGV
end