Node.js script to load all partitions, load all recursive children folder and files, calculating the total folders size and write them to a json file

drives.js

var fs = require('fs'),
    path = require('path')

if (!fs.existsSync('./partitions')){
    fs.mkdirSync('./partitions');
}


function getFilesRecursive (folder,callback) {
    var fileContents = fs.readdirSync(folder),
        fileTree =  {};

	var totalSize = 0;
    fileContents.forEach(function (fileName) {
        var err = false;
		try{
			stats = fs.lstatSync(folder + '/' + fileName);
        }catch(e){
            err = true;
        }
        if(!err){
			if (stats.isDirectory()) {
                fileTree[fileName] = {
                        type: "directory"
                };
                var children = getFilesRecursive(folder + '/' + fileName,function(size){
                    fileTree[fileName].size = size;
                    totalSize += size;
                });
                fileTree[fileName].children = children;
			} else {
				totalSize += stats.size;
				fileTree[fileName] = {
					size: stats.size,
					type: "file"
				};
			}
        }
    });
    if(callback)
        callback(totalSize);

    return fileTree;
};


var drivelist = require('drivelist');
 

drivelist.list(function(error, disks) {
		if (error) throw error;
		for (var i in disks) {
			var disk = disks[i];
			var drive = {};
			var path = disk.mountpoint+"//";
			console.log("Processing: "+disk.description+" at "+path);
			drive.info = disk;
			drive.content = getFilesRecursive(path);
            drive.info.used = 0;
            for(var j in drive.content){
                drive.info.used+=drive.content[j].size;
            }
			var fileContent = JSON.stringify(drive, null, 4);
			var filename = disk.name.replace(/[^a-z0-9]/gi, '_').toLowerCase();
			fs.writeFile("./partitions/"+filename+".json", fileContent);
		}
});