summarize git commits.. (relies on git extra's being installed)

commit_summary.rb

#!/usr/bin/ruby
require 'fileutils'
include FileUtils
$here = File.expand_path(File.dirname("."))

git_dirs = Dir.glob("#{$here}/*/.git").reject{|x| x == "." || x == ".." }
@total   = {}

def translate(user)
  case user
  # Put name mappings here
  when "FOO" : return "BAR"
  end
  user
end

def git_summary(path)
  FileUtils.cd path do
    `git summary`.split("\n").each do |output|
      if output =~ /^\s*(\d+)\s*(.*?)\s+(\d+\.\d+)%$/x
        user    = "%-20s" % translate($2.strip.upcase)
        commits = $1.strip
        if @total.has_key? user
          @total[user] = @total[user] + commits.to_i
        else
          @total[user] = commits.to_i unless commits.nil?
        end
      end
    end
  end
end

git_dirs.each do |git_dir|
  path = git_dir.sub!(/\.git/, "")
  git_summary(path)
end

@total.keys.sort.map do |k|
  amount = "%5s" % @total[k].to_s
  puts "#{k} #{amount} commits"
end