#!/usr/bin/ruby

# simple inotify script to watch what happens in a directory
# usage: watch <dir> [<event regex>]
# (c) 2008 Yoann Guillot
# License: WTFPLv2

require "inotify"

dstdir = ARGV.shift || '.'
mask = ARGV.shift

evts = Inotify.constants.inject({}) { |h, cst|
	v = Inotify.const_get(cst)
	h[v] = cst if v.kind_of? Integer
	h
}

last = nil
i = Inotify.new
i.add_watch(dstdir, Inotify::ALL_EVENTS)
i.each_event { |ev|
	next if ev.mask & 0x4000_0000 > 0
	m = ev.mask & ~0x4000_0000
	next if mask and evts[m] !~ /#{mask}/i
	ev = "\r#{evts[m] || ('%016b' % m)}".ljust(16) + ev.name.inspect
	if last == ev
		if $stdout.tty?
			print '.'
			$stdout.flush
		end
	else
		puts ev
		last = ev
	end
}