swerling-sinotify

ALPHA Alert -- just uploaded initial release. Linux inotify is a means to receive events describing file system activity (create, modify, delete, close, etc). Sinotify was derived from aredridel's package (http://raa.ruby-lang.org/project/ruby-inotify/), with the addition of Paul Boon's tweak for making the event_check thread more polite (see http://www.mindbucket.com/2009/02/24/ruby-daemons-verifying-good-behavior/) In sinotify, the classes Sinotify::PrimNotifier and Sinotify::PrimEvent provide a low level wrapper to inotify, with the ability to establish 'watches' and then listen for inotify events using one of inotify's synchronous event loops, and providing access to the events' masks (see 'man inotify' for details). Sinotify::PrimEvent class adds a little semantic sugar to the event in to the form of 'etypes', which are just ruby symbols that describe the event mask. If the event has a raw mask of (DELETE_SELF & IS_DIR), then the etypes array would be [:delete_self, :is_dir]. In addition to the 'straight' wrapper in inotify, sinotify provides an asynchronous implementation of the 'observer pattern' for notification. In other words, Sinotify::Notifier listens in the background for inotify events, adapting them into instances of Sinotify::Event as they come in and immediately placing them in a concurrent queue, from which they are 'announced' to 'subscribers' of the event. [Sinotify uses the 'cosell' implementation of the Announcements event notification framework, hence the terminology 'subscribe' and 'announce' rather then 'listen' and 'trigger' used in the standard event observer pattern. See the 'cosell' package on github for details.] A variety of 'knobs' are provided for controlling the behavior of the notifier: whether a watch should apply to a single directory or should recurse into subdirectores, how fast it should broadcast queued events, etc (see Sinotify::Notifier, and the example in the synopsis section below). An event 'spy' can also be setup to log all Sinotify::PrimEvents and Sinot...