Formatting metric_abc output of your Rails app

abc.rb

#!/usr/bin/env ruby
#
# usage: ./abc.rb
#
# Shows the total, average, and the worst 10 methods in the project.
 
def pt(line)
  line[/(?<=: )\d+/].to_i
end

IO.popen("metric_abc `find app lib spec -name '*.rb'`"){|f|
  n_line = 0
  total = 0
  n_worst = 10
  worst = [': 0'] * n_worst

  while l = f.gets
    n_line += 1
    total += pt(l)
    worst[n_worst] = l
    worst.sort!{|a,b| pt(b) - pt(a) }
  end

  print <<-END
Examined #{n_line} methods:

Total: #{total} / Ave. #{(total.to_f / n_line).round(2)}

Worst Ranking:
#{worst[0, 10].join}
  END
}