require "set" require "pathname" require "mutex_m" module Spring module Watcher # A user of a watcher can use IO.select to wait for changes: # # watcher = MyWatcher.new(root, latency) # IO.select([watcher]) # watcher is running in background # watcher.stale? # => true class Abstract include Mutex_m attr_reader :files, :directories, :root, :latency def initialize(root, latency) super() @root = File.realpath(root) @latency = latency @files = Set.new @directories = Set.new @stale = false @io_listener = nil end def add(*items) items = items.flatten.map do |item| item = Pathname.new(item) if item.relative? Pathname.new("#{root}/#{item}") else item end end items.each do |item| if item.directory? directories << item.realpath.to_s else files << item.realpath.to_s end end subjects_changed end def stale? @stale end def mark_stale @stale = true @io_listener.write "." if @io_listener end def to_io read, write = IO.pipe @io_listener = write read end def restart stop start end def start raise NotImplementedError end def stop raise NotImplementedError end def subjects_changed raise NotImplementedError end end end end