drupal8_contrib.rb

#!/usr/bin/env ruby
require 'pp'

contributors = Hash.new(0)
%x[git log 8.x --since=2011-03-09 -s --format=%s].split("\n").each do |m|
  m.scan(/\s(?:by\s?)([\w\s,.]+)[( | ):]/i).each do |people|
    people[0].split(',').each do |p|
      p = p.gsub(/et all?/, '')
      p.strip!
      contributors[p] += 1 unless p.nil?
    end
  end
end

pp contributors.sort_by {|key, value| value}