A simple task status output helper for Ruby.

status_line.rb

class StatusLine
  MAX_LENGTH = 72
  FORMAT = "[    ] %.#{MAX_LENGTH}s"

  BUSY = 'BUSY'
  DONE = 'DONE'
  FAIL = 'FAIL'

  COLOR="\033[%s;%sm"

  COLORS = {
    black: 30,
    red: 31,
    green: 32,
    yellow: 33,
    blue: 34,
    magenta: 35,
    cyan: 36,
    white: 37,
  }
  COLORS.update Hash[COLORS.collect { |name, code|
    [:"bright_#{name}", code + 60]
  }]

  EFFECTS = {
    none: 0,
    bold: 1,
  }

  def initialize(text, busy: true, color: :white, effect: :none)
    color color
    puts FORMAT % text + (text.length > MAX_LENGTH ? '…' : '')
    busy! if busy
  end

  def busy!(color: :yellow, effect: :none)
    move_cursor
    color color, effect
    puts BUSY
    reset
  end

  def done!(color: :green, effect: :none)
    move_cursor
    color color, effect
    puts DONE
    reset
  end

  def fail!(color: :red, effect: :none)
    move_cursor
    color color, effect
    puts FAIL
    reset
  end

private

  def color(color, effect=:none)
    print COLOR % [EFFECTS.fetch(effect), COLORS.fetch(color)]
  end

  def reset
    color :white, :none
  end

  def move_cursor
    print "\033[1A\033[1C"
  end
end

status_line_demo.rb

require 'status_line'

status_line = Podlast::StatusLine.new('Status')
# => [BUSY] Status

sleep 1

status_line.done!
# => [DONE] Status

sleep 1

status_line.fail!
# => [FAIL] Status