How DHH tamed the 500-line routes.rb file in the new Basecamp

gistfile1.rb

class ActionDispatch::Routing::Mapper
  def draw(routes_name)
    instance_eval(File.read(Rails.root.join("config/routes/#{routes_name}.rb")))
  end
end

BCX::Application.routes.draw do
  draw :api
  draw :account
  draw :session
  draw :people_and_groups
  draw :projects
  draw :calendars
  draw :legacy_slugs
  draw :ensembles_and_buckets
  draw :globals
  draw :monitoring
  draw :mail_attachments
  draw :message_preview
  draw :misc

  root to: 'projects#index'
end

Yeah, doesn't work for me either in dev env.. Did you found a solution?