Call make when files change

change_make

#!/usr/bin/env ruby

#
# Will monitor a directory for changes, call make when picked up (after a tiny pause)
#

def new_timestamp()
        timestamps = Dir.glob("./src/*.erl").map do |m| File.atime(m).to_i  end
        timestamps.inject { |i,j| i + j }
end

previous = 0
while(true)
        newtime = new_timestamp()
        if newtime != previous then
           sleep(0.1)
           puts `make`
           previous = new_timestamp()
        end
        sleep(1)
end