require 'thread' require 'listen/internals/thread_pool' module Listen module Adapter # Adapter implementation for Mac OS X `FSEvents`. # class Darwin < Base OS_REGEXP = /darwin(1.+)?$/i # The default delay between checking for changes. DEFAULTS = { latency: 0.1 } private # NOTE: each directory gets a DIFFERENT callback! def _configure(dir, &callback) require 'rb-fsevent' opts = { latency: options.latency } @workers ||= ::Queue.new @workers << FSEvent.new.tap do |worker| _log :debug, "fsevent: watching: #{dir.to_s.inspect}" worker.watch(dir.to_s, opts, &callback) end end def _run first = @workers.pop # NOTE: _run is called within a thread, so run every other # worker in it's own thread _run_workers_in_background(_to_array(@workers)) _run_worker(first) end def _process_event(dir, event) _log :debug, "fsevent: processing event: #{event.inspect}" event.each do |path| new_path = Pathname.new(path.sub(/\/$/, '')) _log :debug, "fsevent: #{new_path}" # TODO: does this preserve symlinks? rel_path = new_path.relative_path_from(dir).to_s _queue_change(:dir, dir, rel_path, recursive: true) end end def _run_worker(worker) _log :debug, "fsevent: running worker: #{worker.inspect}" worker.run rescue _log_exception 'fsevent: running worker failed: %s:%s called from: %s', caller end def _run_workers_in_background(workers) workers.each do |worker| # NOTE: while passing local variables to the block below is not # thread safe, using 'worker' from the enumerator above is ok Listen::Internals::ThreadPool.add { _run_worker(worker) } end end def _to_array(queue) workers = [] workers << queue.pop until queue.empty? workers end end end end