class SvelteOnRails::Lib::Utils

def self.watch_changes_and_precompile
  config = SvelteOnRails::Configuration.instance
  return unless config.watch_changes?
  mtime = Dir[File.join(config.components_folder_full, '**/*.svelte')].map do |file|
    File.mtime(file).to_f
  end.max || 0.0
  last = if Dir.exist?(config.ssr_dist_folder)
           mtime_path = config.ssr_dist_folder.join('last_mtime')
           (File.exist?(mtime_path) ? File.read(mtime_path).to_f : 0.0)
         end
  if !last || mtime > last
    precompile(mtime)
  end
end