Attempt n times

attempt.rb

	# Attempt a certain action several times before giving up
	#
	# Usage: `attempt(3.times, rescue: RuntimeError) do ... end`
	#
	def attempt(times, options = {})
		times = times.is_a?(Enumerator) ? times.max : times.to_i

		begin
			attempt ||= 0
			puts "Checking (attempt #{attempt+1})..."
			sleep(attempt)
			yield(attempt)
		rescue options[:rescue] => ex
			retry if (attempt += 1) <= times
			puts "Giving up.".yellow
		end
	end