test.rb

#! /usr/bin/env ruby

$LOAD_PATH.unshift '/Users/schacon/projects/git/rugged/lib'
require 'rugged'

require 'rubygems'
require 'pp'

dir, id = "/opt/linux.git"

repo = Rugged::Repository.new(dir)

walker = Rugged::Walker.new(repo)

Rugged::Reference.each(repo) do |r|
  ref = Rugged::Reference.lookup(repo, r)
  begin
    walker.push(ref.target)
  rescue
    nil
  end
end

walker.each do |commit|
  counter += 1
end

puts counter