javascript development script

README

Watch a dir to concat javascript file when it is change.

concat.js

#!/usr/bin/env node

var fs = require('fs'),
	config = JSON.parse(fs.readFileSync(__dirname + '/config.json'));


//Add or delete ipfw rule
//all incoming tcp port 80 will forward to 127.0.0.1:8000
function ipfw(add){
	if(typeof child !== 'undefined'){
		child.kill();
	}
	if(typeof use_ipfw === 'undefined' || !use_ipfw){
		return;
	}
	add ?
		require('child_process').exec('sudo ipfw add 110 fwd 127.0.0.1,8080 tcp from any to any dst-port 80 in') :
		require('child_process').exec('sudo ipfw del 110');
}

//For growl notifaction
function growl(message){
	var growlnotify = "`which growlnotify`",
  		title = "Node Results",
		options = " -n Node  -m '" + message + "' '" + title + "'";
	require('child_process').exec(growlnotify + options);
}

//Because no support module for FSEvent (http://en.wikipedia.org/wiki/FSEvents) ,Inotify(http://en.wikipedia.org/wiki/Inotify),
//Directory Change Notification(http://msdn.microsoft.com/en-us/library/aa365261%28VS.85%29.aspx).
//FIXME: samply implement it.
function watch(dir,callback){
	var files = fs.readdirSync(dir); 
	//watch all file in dir
	files.forEach(function(f,i){
		if(inclused(f)){
			fs.watchFile(dir + '/' + f, 
				{ persistent: true, interval: 0 }, 
				function(curr, prev){
					if(curr.mtime > prev.mtime){
						callback(dir, curr, prev);
					}
				}
			);
		}
	});
}

//normalize config file
function normal(file){
	return path.normalize(__dirname + file);
}

//Exclude file include hidden file,ect:.DS_Store
function inclused(f){
	var excluse = config.excluse;
	return !/^\./.test(f) &&
		excluse && 
		!~excluse.indexOf(f);
}

//Hold SIGN Ctrl-gi
process.on('SIGINT', function () {	
	console.log('\nBye.\n');
	concatJs(normal(dir));
	ipfw(false);
	setTimeout(function(){process.exit(0);},500);
	
});

//Hold SIGN Ctrl-\,
//This sign is not in windows
process.on('SIGQUIT', function () {
	console.log("\nBye.\n");
	ipfw(false);
	process.exit(0);
});

//Concat the js file in folder.
function concatJs (dir) {
	var data = '',
		files = fs.readdirSync(dir);
	//dependences file
	config.dependences.forEach(function (v,i) {
		data += fs.readFileSync(normal(v));
	});
	//file in folder
	files.forEach(function(f,i){
		var filename = dir + '/' + f ;
		if(inclused( f) && fs.statSync(filename).isFile()){
			data += '\n' + fs.readFileSync( filename , 'utf8');
		}
	});
	//write to dist file
	fs.writeFile(normal(config.dist), data);
	growl('Dist core file');
	console.log('dist file:' , normal(config.dist));
}


function start () {
	if(!path.exists(normal(config.dist))){
		concatJs(normal(config.path))
	}
	ipfw(true);
	watch(normal(config.path),concatJs);
	growl('Concat service started!');
}

var use_ipfw = true;
var child = require('child_process').exec("livereload "+ __dirname +"/../../ >/dev/null 2>&1");

start();

config.json

{
	
	"dependences" : ["/../js/core.js","/../third-party/json2.js"],

	"excluse" : ["core.js"],

	"dist" : "/../dist/core.js",

	"path" : "/../js"
}