FSEvents API implementation in MacRuby

fsevents.rb

if RUBY_ENGINE == 'macruby'
  framework 'CoreServices'

  WATCHED_EXTS = "rb,builder,erb,nokogiri"
  PASSENGER_RESTART_FILE = File.expand_path(File.join(File.dirname(__FILE__), "..", "tmp", "restart.txt"))
  DELAY = 3

  def modified_files(path)
    Dir.glob("#{File.expand_path(path)}/*.{#{WATCHED_EXTS}}").map do |filename|
      begin
        [File.mtime(filename), filename]
      rescue Errno::ENOENT
        nil
      end
    end.compact.map { |mtime, filename| filename if mtime > Time.now - DELAY}.compact
  end
  

  callback = Proc.new do |stream, client_callback_info, number_of_events, paths_pointer, event_flags, event_ids|
    # cast the pointer as a char string since it's defined as a void pointer.
    paths_pointer.cast!('*')
    number_of_events.times do |n|
      unless modified_files(paths_pointer[n]).empty?
        puts "#{modified_files(paths_pointer[n]).join(" ")} modified, telling passenger to reload"
        # restart passenger by touching tmp/restart.txt
        `touch #{PASSENGER_RESTART_FILE}`
      end
    end
  end

  paths = [File.expand_path(File.join(File.dirname(__FILE__), ".."))]
  stream = FSEventStreamCreate(KCFAllocatorDefault, callback, nil, paths, KFSEventStreamEventIdSinceNow, 0.0, 0)
  FSEventStreamScheduleWithRunLoop(stream, CFRunLoopGetCurrent(), KCFRunLoopDefaultMode)
  FSEventStreamStart(stream)

  NSRunLoop.currentRunLoop.runUntilDate(NSDate.distantFuture)

else
  puts "This reloader script only works in MacRuby."
end

That was it, thanks both of you!

I got really bored: ttilley/mrb-fsevent@b472717