var version = "", newVersion = ""; process.argv.forEach(function (val, index, array) { if (index === 2) { version = val; } if (index === 3) { newVersion = val; } }); var fs = require("fs"); var skins = ["andrea", "classic", "community", "favourite", "i-nove", "neoease", "owmx-3.0", "tree-house"]; for (var i = 0; i < skins.length; i++) { var fileName = "../../" + skins[i] + "/skin.properties"; var file = fs.readFileSync(fileName, "UTF-8"); fs.writeFileSync(fileName, file.replace("forSolo=" + version, "forSolo=" + newVersion), "UTF-8"); }