i18next.config.mjs

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

const I18N_DIRECTORY = "i18n-locales";

// Function to read filenames in a directory and filter them by pattern synchronously
function readLocaleFilenamesSync(directory) {
  try {
    const files = fs.readdirSync(directory);
    // Filter files to match only .js files and remove the extension
    const locales = files
      .filter((file) => file.endsWith(".js"))
      .map((file) => path.basename(file, ".js"));
    return locales;
  } catch (error) {
    console.error("Error reading locale filenames:", error);
    return [];
  }
}

// Assuming this file is located at the root of your project
// Adjust the path to your i18n directory accordingly
const srcDirectory = path.join(process.cwd(), process.env.SRC_DIRECTORY || "");
export const i18nDirectory = path.join(srcDirectory, I18N_DIRECTORY);
if (!fs.existsSync(i18nDirectory)) {
  // Recursive option ensures that all directories are created along the path if they don't exist
  fs.mkdirSync(i18nDirectory, { recursive: true });
  console.log(`Directory ${i18nDirectory} was created.`);
  console.log(
    `Now you need to add [LOCALE].js files there with translations and run this command again.`
  );
}

// Use the synchronous function to set locales
const locales = readLocaleFilenamesSync(i18nDirectory);
export { locales };

export default {
  lexers: {
    mjs: ["JavascriptLexer"],
    js: ["JavascriptLexer"],
    ts: ["JavascriptLexer"],
    jsx: ["JsxLexer"],
    tsx: ["JsxLexer"],
  },
  locales,
  //relative to process.cwd() - or better use absolute paths
  output: path.join(srcDirectory, I18N_DIRECTORY, "$LOCALE.keys.json"),
  //relative to this file - or better use absolute paths
  input: [
    path.join(srcDirectory, "**", "*.{ts,tsx}"),
    "!" + path.join(srcDirectory, "node_modules", "**"),
  ],
};