Uses Node.js to compile LESS files (on file change) into compressed css automatically! This simple script has saved me hours of compile & versioning mistakes by compiling everything automatically per-file! 1. Drop LESScompiler.js and struct.json into a folder with all your LESS files 2. Modify struct.json to fit your file names & output location…

LESScompiler.js

var less = require('less'),
    fs = require('fs'),
    path = require('path'),
    struct = path.join(__dirname,'struct.json'),
    files = {};

// Watch current folder & compile if file from files{} has changed
fs.watch(__dirname,function (evt, file) {
    file = path.relative(__dirname,file);
    if ( !file || !files[file] ) return;
    if (files[file]) compileLESS(file,files[file]);
});

// HELPERS
function compileLESS (from, to) {
    from = path.join(__dirname,from);
    to = path.join(__dirname,to);
    fs.readFile(from,function (err, data) {
    if (err) return;
        less.render(data.toString(),{compress:true,paths:[__dirname]},function(e,css){
            if (!e) fs.writeFile(to,css);
        });
    });
}

// Simply reads struct.json into files{}
updateFiles();
fs.watch(struct,updateFiles);
function updateFiles () {
    fs.readFile(struct,function (err, data) {
    if(err) return;
       files = JSON.parse(data);
    });
}

struct.json

{
    "file1.less" : "file1.css",
    "file2.less" : "../www/file2.css",
    "file3.less" : "../www/somefolder/more/file3.css"
}

looks like less developers changed their render function to output an object instead of plain css.
I had to change rows 20 + 21 to get it working:

less.render(data.toString(),{compress:true,paths:[__dirname]},function(e,output){
    if (!e) fs.writeFile(to,output.css);

you can also see this in the official documentation:
http://lesscss.org/#using-less-configuration