#!/usr/bin/env ruby
#
# Copyright 2007-2008 David Shakaryan <omp@gentoo.org>
# Distributed under the terms of the GNU General Public License v2.

# Calculate seconds remaining; specify the date or time here.
s = Time.local(2008,8,15,17).to_i - Time.now.to_i

# Exit with an error message if the supplied time is in the past.
if s < 0
  puts 'You can not go back in time, idiot.'
  exit 1
end

# Calculate days, hours and minutes remaining.
d, s = s.divmod(60*60*24)
h, s = s.divmod(60*60)
m, s = s.divmod(60)

# Output time remaining.
print "#{d} days, " unless d.zero?
print "#{h} hours, " unless h.zero?
print "#{m} minutes, " unless m.zero?
puts "#{s} seconds"