reload_world.ru

use Rack::Config do |env|
  # Store mtimes to track changes
  @mtimes ||= Hash.new { |map, file| map[file] = File.mtime(file) }

  # Check all loaded files for changes
  $LOADED_FEATURES.each do |feature|
    file = nil

    # Let's see if we can find the file. 1.8 stores the string we
    # pass to require plus the file extension. 1.9 actually stores
    # the expanded paths. But if that's the case, the first entry
    # to $LOAD_PATH satisfy the condition.
    next unless $LOAD_PATH.any? { |dir|
      File.exist?(file = File.expand_path(feature, path)) }

    # Check if file changed
    if @mtimes[file] != File.mtime(file)
      # Store the new mtime, so we don't reload it next time
      @mtimes[file] = File.mtime
      # Reload
      load file
    end
  end
end

require 'application'
run Application