ProgressBar in ruby (e. g. for console rakes.)

progress_bar.rb

class ProgressBar
  RUNNING = %W{👆 👇 👈 👉 👊}.freeze

  attr_reader :count, :position

  def initialize caption, count, running = RUNNING
    @count = count
    @caption = " #{caption} "
    @running = running.cycle
    @position = 0
  end

  def tick
    @now = Time.now if @position.zero?

    @position += 1

    closing
    opening
    meter
  end

  ############################################################################

  def self.test caption = 'Hello', count = 1024
    ProgressBar.new(caption, count).tap do |pb|
      pb.count.times do
        sleep 0.01
        pb.tick
      end
    end
  end

  ############################################################################

  private

  def opening(sym = '|')
    print "\e[1G#{@caption}#{sym}"
  end

  def closing(sym = '|')
    print "\e[#{$stdin.winsize.first}G#{sym}"
  end

  def meter(sym = '=')
    print sym * (@position.to_f * ($stdin.winsize.first - @caption.length - 2) / @count)
    if @position == @count
      puts
      # rubocop:disable Style/FormatString
      puts "It took %s min %s sec" % (Time.now - @now).ceil.divmod(60)
      # rubocop:enable Style/FormatString
    else
      print @running.next
    end
  end
end