time.rake

def format_time_interval(from_time, to_time)
  seconds = (to_time - from_time).abs.round
  minutes, seconds = seconds.divmod(60)
  if minutes > 60 * 24
    "         "
  elsif minutes > 60
    hours, minutes = 
    " %2dh %2dm " % minutes.divmod(60)
  else
    " %2dm %2ds " % [minutes, seconds]
  end
end

desc "Print the commits with the amount of time between each commit"
task :time do
  if `git config --list` =~ /^user\.email=(.*)$/
    email = $1
  else
    raise "Could not find your email address in git config"
  end
  
  prev_time = Time.now
  prev_subject = nil
  `git log --author=#{email} --pretty=format:"%ct %s"`.each_line do |l|
    if l =~ /^(\d+) (.*)$/
      curr_time = Time.at($1.to_i)
      if prev_subject
        puts "#{prev_time.strftime('%a, %b %d %I:%M%p')} #{format_time_interval(prev_time, curr_time)} #{prev_subject}"
      end
      prev_subject = $2
      prev_time = curr_time
    end
  end
end