po-converter.js

const { readdirSync, readFileSync, writeFileSync } = require("fs");
const converter = require("i18next-conv");
const i18nDir = "./i18n";
const options = {
    skipUntranslated: true,
    keyseparator: "°#°#°#°#°"
};

const translations = {};
const files = readdirSync(i18nDir);
const numberOfFiles = files.length;
function storeTranslationsForIndex(index) {
    if ( index >= 0 && index < numberOfFiles) {
        const file = files[index];
        const fileSplittend = file.split(".");
        if (fileSplittend.length === 2 && fileSplittend[1] === "po") {
            const fileContent = readFileSync(i18nDir + "/" + file, "utf-8");
            const locale = fileSplittend[0];
            converter.gettextToI18next(locale, fileContent, options).then(function (data) {
                translations[locale] = { translation: JSON.parse(data) };
                storeTranslationsForIndex(index + 1);
            });
        } else {
            storeTranslationsForIndex(index + 1);
        }
    } else {
        writeFileSync("./i18n/resources.js", "const i18nextResources = " + JSON.stringify(translations, null, 2) + "; export default i18nextResources;");
    }
}

storeTranslationsForIndex(0);