Retrieve a Github project's Stargazers meta data

top_github_stargazers.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'nokogiri'
require 'open-uri'

class GithubStargazers

  def initialize(repo)
    @repo = repo
  end

  def by_followers
    page = 1
    users = []
    begin
      doc = Nokogiri::HTML open("https://github.com/#{@repo}/stargazers?page=#{page}")
      usernames = doc.css("ul.members li>a").collect { |link| link.attr("href").gsub("/","") }
      page = doc.css("div.pagination").children[1].attr("href") ? page + 1 : nil
      users += usernames.collect do |username|
        user_doc = Nokogiri::HTML open("https://github.com/#{username}")
        followers = user_doc.at_css("ul.stats>li>a>strong").text.to_i
        stars = 0
        user_doc.css("ul.repo-stats li.stargazers>a").each { |repo_stars| stars += repo_stars.text.to_i }
        {:name => username, :followers => followers, :stars => stars}
      end
    end while page
    users.sort! { |a,b| influence(b) <=> influence(a) }
  end

  def influence(user)
    user[:followers]
  end
end

stargazers = GithubStargazers.new("bwillis/versioncake").by_followers
stargazers.each do |stargazer|
  puts "#{stargazer[:name]}: followers: #{stargazer[:followers]}, github: https://github.com/#{stargazer[:name]}"
end