uptime-kuma/extra/update-language-files/index.js

// Need to use es6 to read language files

import fs from "fs";
import path from "path";
import util from "util";

// https://stackoverflow.com/questions/13786160/copy-folder-recursively-in-node-js
/**
 * Look ma, it's cp -R.
 * @param {string} src  The path to the thing to copy.
 * @param {string} dest The path to the new copy.
 */
const copyRecursiveSync = function (src, dest) {
    let exists = fs.existsSync(src);
    let stats = exists && fs.statSync(src);
    let isDirectory = exists && stats.isDirectory();
    if (isDirectory) {
        fs.mkdirSync(dest);
        fs.readdirSync(src).forEach(function (childItemName) {
            copyRecursiveSync(path.join(src, childItemName),
                path.join(dest, childItemName));
        });
    } else {
        fs.copyFileSync(src, dest);
    }
};
console.log(process.argv)
const baseLangCode = process.argv[2] || "zh-HK";
console.log("Base Lang: " + baseLangCode);
fs.rmdirSync("./languages", { recursive: true });
copyRecursiveSync("../../src/languages", "./languages");

const en = (await import("./languages/en.js")).default;
const baseLang = (await import(`./languages/${baseLangCode}.js`)).default;
const files = fs.readdirSync("./languages");
console.log(files);
for (const file of files) {
    if (file.endsWith(".js")) {
        console.log("Processing " + file);
        const lang = await import("./languages/" + file);

        let obj;

        if (lang.default) {
            console.log("is js module");
            obj = lang.default;
        } else {
            console.log("empty file");
            obj = {};
        }

        // En first
        for (const key in en) {
            if (! obj[key]) {
                obj[key] = en[key];
            }
        }

        // Base second
        for (const key in baseLang) {
            if (! obj[key]) {
                obj[key] = key;
            }
        }

        const code = "export default " + util.inspect(obj, {
            depth: null,
        });

        fs.writeFileSync(`../../src/languages/${file}`, code);

    }
}

fs.rmdirSync("./languages", { recursive: true });