gistfile1.rb

#!/usr/bin/env ruby
class String
  def truncate(length = 30, truncate_string = "...")
    return self if self.length <= length
    short_length = length - truncate_string.length
    self[0...short_length] + truncate_string
  end
end

def date
  Time.now.strftime('%Y/%m/%d %H:%M')
end

def mpd
  mpc = `mpc`
  status = mpc =~ /\[(\w+)\]/ && $1
  return 'blargh' unless status
  return status.to_s unless status == 'playing'
  song = mpc.split("\n")[0]
  song.truncate(30)
end

puts "#{date} | M: #{mpd}"