Lazy Path Registration

install.js

var c = require("child_process");
var _ = require("lazy.js");
var fs = require("fs");
var matches = /^\s*(LIB|LIBPATH|PATH|PlatformToolset|sdkdir|TARGET_PLATFORM|VS\d{3}COMNTOOLS|WindowsSDKDir)=/;
var HOME = require("osenv").home();

if(process.argv[2] && process.argv[2].toString("utf8") === "uninstall"){
	uninstall();
}else{
	install();
}

function uninstall(next){
	var stored = JSON.parse(fs.readFileSync(HOME+"\\CodeSmith\\uninstall\\addedPath.json","utf8"));
	console.log("iterating");
	_(c.execSync("SET").toString("utf8"))
	.split("\r\n")
	.filter(function(str){
		return matches.test(str);
	}).each(function(val){
		val = val.split("=");
		if(typeof stored[val[0]] === "undefined") return;
		ori = stored[val[0]];
		val[1] = _(val[1])
			.split(";")
			.without(ori.concat(["","\n","\r\n","\r"]))
			.toArray();
	
		console.log(val[1]);
		console.log(ori);

		c.execSync(
			"SetX "+
			val[0]+" \""+val[1]+"\""
		);
	});
	fs.unlink(HOME+"\\CodeSmith\\uninstall\\addedPath.json",function(err){
		if(err) throw err;
		fs.rmdirSync(HOME+"\\CodeSmith\\uninstall");
		fs.rmdirSync(HOME+"\\CodeSmith");
		console.log("uninstalled");
		next();
	});

}

function install(){
var stats;
var new_ws = false;

try{
	stats = fs.statSync(HOME+"\\CodeSmith\\uninstall\\addedPath.json");
}catch(e){
	//If the file doesn't exist, we can do this fresh.
}
if(stats && stats.size > 0){
	return uninstall(install);
}

try{
	stats = fs.statSync(HOME+"\\CodeSmith");
	if(!stats.isDirectory()){
		fs.unlinkSync(HOME+"\\CodeSmith");
		throw new Error("was not directory");
	}
}catch(e){
	fs.mkdir(HOME+"\\CodeSmith");
}

try{
	stats = fs.statSync(HOME+"\\CodeSmith\\uninstall");
	if(!stats.isDirectory()){
		fs.unlinkSync(HOME+"\\CodeSmith\\uninstall");
		throw new Error("was not a directory");
	}
}catch(e){
	fs.mkdir(HOME+"\\CodeSmith\\uninstall");

}
new_ws = fs.createWriteStream(HOME+"\\CodeSmith\\uninstall\\addedPath.json");
new_ws.started = true;
new_ws.write("{\n");


var cmd = 'C:\\Program" "Files\\Microsoft" "SDKs\\Windows\\v7.1\\Bin\\SetEnv.cmd';

var orig = _(
	c.execSync("SET").toString("utf8")
).split("\r\n").filter(function(str){
	return matches.test(str);
}).map(function(val){
	val = val.split("=");
	val[1] = val[1].split(";");
	return val;
}).toObject();
_(
	c.execSync(cmd+" & SET").toString("utf8")
).split("\r\n").filter(function(str){
	return matches.test(str);
}).each(function(val){
	val = val.split("=");
	var ori = orig[val[0]]||[];
	val[1] = _(val[1])
		.split(";")
		.without(ori.concat(["","\n","\r\n","\r"]))
		.toArray();
	
	console.log(val[1]);
	console.log(ori);

	if(new_ws.started){
		new_ws.started = false
	}else{
		new_ws.write(",\r\n");
	}
	new_ws.write("\""+val[0]+"\":"+JSON.stringify(val[1]));

	c.execSync("SetX "+val[0]+" \""+ori.concat(val[1]).join(";")+"\"");

});

new_ws.end("\n}");
console.log("installed");
}