Rack app to listen for POST from Github post receive hook.

rack_app.rb

require 'rack'
module GithubPostReceiveServer
  class RackApp
    def handle_request
      payload = @req.POST["payload"]
      if payload.nil?
        return Rack::Response.new('404 Not Found', 404)
      end

      ENV.delete('GIT_DIR')
      $LOG.debug "Running r10k as UID #{Process.uid}..."
      %x{/opt/puppet/bin/r10k deploy environment -p}
      $LOG.debug "Done running r10k."

      Rack::Response.new('OK', 200)
    end

    # Call is the entry point for all rack apps.
    def call(env)
      @req = Rack::Request.new(env)
      @res = handle_request
      @res.finish
    end
  end
end