gotgit.rb

require 'rubygems'
require 'grit'
require 'gruff'

module GotGit
  class Repo
    def initialize(url)
      @repo = Grit::Repo.new url
    end

    def authors
      return @authors if @authors
      author_hash = {}
      @repo.each_commit do |commit|
        author_hash[commit.author.name] ||= 0
        author_hash[commit.author.name] += 1
      end
      @authors = author_hash.sort_by {|k, v| v }.reverse
    end

    def plot(filename)
      g = Gruff::Bar.new
      g.title = "Contributors"
      g.hide_legend = true
      authors.each {|a| g.data a.first, a.last }
      g.write filename
    end
  end
end

module Grit
  class Repo
    def each_commit(branch='master', &block)
      offset = 0
      max = 1000
      while !(this_group = commits(branch, max, max * offset)).empty? do
        this_group.each {|c| block.call(c) }
        offset += 1
      end
    end
  end
end