pure ruby get terminal cursor position

get_pos.rb

require 'io/console'

class Cursor
  class << self
    def pos
      res = ''
      $stdin.raw do |stdin|
        $stdout << "\e[6n"
        $stdout.flush
        while (c = stdin.getc) != 'R'
          res << c if c
        end
      end
      m = res.match /(?<row>\d+);(?<column>\d+)/
      { row: Integer(m[:row]), column: Integer(m[:column]) }
    end
  end
end

puts Cursor.pos