Hide/capture input

input.rb

class InputReader
  def initialize
    @thread = Thread.new do
      check_input
    end
  end

  def check_input
    $stdin.each_line do |line|
      process_input(line.chomp)
    end
  end

  def process_input(input)
    $stdout.puts "You Said: #{input}"
  end

  def join
    @thread.join
  end
end

def noecho
  original_settings = `stty -g`

  `stty -echo`

  yield

ensure
  `stty #{original_settings}`
end

noecho do
  input = InputReader.new
  input.join
end