Copy file out of ASAR archive for Electron app

copyContent.js

var fs = require("fs");
var path = require("path")

var app = require("electron").remote.app;
// var fsj = require("fs-jetpack");

// example usage : copyFileOutsideOfElectronAsar( "myFolderInsideTheAsarFile", app.getPath("temp") + "com.bla.bla"

var copyFileOutsideOfElectronAsar = function (sourceInAsarArchive, destOutsideAsarArchive) {
    if (fs.existsSync(app.getAppPath() + "/" + sourceInAsarArchive)) {

        // file will be copied
        if (fs.statSync(app.getAppPath() + "/" + sourceInAsarArchive).isFile()) {

            let file = destOutsideAsarArchive 
            let dir = path.dirname(file);
            if (!fs.existsSync(dir)) {
                fs.mkdirSync(dir, { recursive: true });
            }

            fs.writeFileSync(file, fs.readFileSync(app.getAppPath() + "/" + sourceInAsarArchive));

        }

        // dir is browsed
        else if (fs.statSync(app.getAppPath() + "/" + sourceInAsarArchive).isDirectory()) {

            fs.readdirSync(app.getAppPath() + "/" + sourceInAsarArchive).forEach(function (fileOrFolderName) {

                copyFileOutsideOfElectronAsar(sourceInAsarArchive + "/" + fileOrFolderName, destOutsideAsarArchive + "/" + fileOrFolderName);
            });
        }
    }

}