Reload roda with zeitwerk on vagrant

This is for anyone who is strugging with reloading roda with zeitwerk, listen and vagrant.

# config.ru
require "roda"
require "zeitwerk"
require "listen"

loader = Zeitwerk::Loader.new
loader.push_dir(__dir__)
loader.enable_reloading
loader.setup

Listen.to(__dir__, only: /\.rb$/, force_polling: true) { loader.reload }.start

run ->(env) {
  loader.reload
  App.call(env)
}

This assumes an app.rb file with class App < Roda

You can run this with rackup in that directory, override port and host like this:

Override port and host with:

rackup -p 9001 -o 0.0.0.0