Engine to watch files

tab.sh

#This file lists a bunch of callbacks for file changed events.

#@ /Users/raym/Sites/myon/includes/content/js/reader/player.3.2.js

java -jar $HOME/Sites/myon/server/utils/rm/lib/yuicompressor-2.4.7.jar /Users/raym/Sites/myon/includes/content/js/reader/player.3.2.js -o /Users/raym/Sites/myon/includes/content/js/reader/player.min.3.2.js;

echo "Hello world";

watcher.rb

#!/usr/bin/env ruby

#require 'fssm'

def starts_with(line, prefix)
	prefix = prefix.to_s
	line[0, prefix.length] == prefix
end

def parse_tab(filename)
	out = Hash.new
	watch = ""
	File.open( filename).each do |line|
		if starts_with(line, "#\@") then
			watch = line[2, line.length].strip!
			out[watch] = Array.new
		elsif ! starts_with(line, '#') && line.strip! != "" && watch != "" then
			out[watch].push(line)
		end
	end
	out
end

def execute_scripts(file, scripts)
	puts "\033[0;36m"+file + "\033[0m modified;"
	scripts.each do |line|
		`#{line}`
	end
	puts "\033[1;33mDone\033[0m";
end

def main(filename, sleep_interval = 4)
	callbacks = parse_tab filename
	callbacks_modified = Hash.new

	#callbacks.each_pair do |file,scripts|
	#	FSSM.monitor(file) do
	#		update do |abs,rel|
	#			execute_scripts(file, scripts)
	#		end
	#	end
	#end

	# main loop
	while true do
		callbacks.each_pair do |file,scripts|
			modified=`stat -f "%m" #{file}`;
			if callbacks_modified[file] != modified then
				callbacks_modified[file] = modified;
				execute_scripts(file, scripts);
			end
		end
		sleep sleep_interval
	end
end

main "tab.sh"