class ConstructBuildRequest
  include HTTParty
 
 
  def initialize(clone_url, *args)
    super
    @clone_url = clone_url
    @oldrev, @newrev, @refname = *args
  end
 
  def commits
    # https://gist.github.com/4d81e30bbc4aac556dec
    revisions = %x{bash -c "git-rev-list --pretty=format:'%H %ai' #{@newrev} ^#{@oldrev}"}.split("\n")
    rev_list = revisions.inject([]) do |list, line|
      if line[0..5] == 'commit'
        list
      else
        list << { :id => line[0..40], :timestamp => line[41..66] }
      end
    end
  end
 
  def payload
    {
      "after" =>  @oldrev,
      "before" =>  @newrev,
      "commits" => commits,
      "ref" => @refname,
      "repository" => {
        "name" => "gitpostreceive",
        "clone_url" => @clone_url
      }
    }
  end
 
  def build
    self.class.post('http://localhost:3000/github', :query => { :payload => payload.to_json })
  end
  
  def self.build(*args)
    new(*args).build
  end
end
 
ConstructBuildRequest.build("/path/to/repos", *STDIN.read.split)