class Opal::BuilderScheduler::Prefork

def fork_entrypoint(io)
  # Ensure we can work with our forks async...
  Fiber.set_scheduler(nil) if Fiber.respond_to? :set_scheduler
  @in_fork = io
  until io.eof?
    $0 = 'opal/builder: idle'
    type, *args = *io.recv
    case type
    when :compile
      rel_path, req, autoloads, options = *args
      $0 = "opal/builder: #{req}"
      begin
        asset = builder.process_require_threadsafely(req, autoloads, options)
        io.send(:new_asset, asset)
      rescue Builder::MissingRequire => error
        io.send(:missing_require_exception, rel_path, error)
      end
    when :close
      io.goodbye
      break
    end
  end
rescue Errno::EPIPE
  exit!
end