Pseudo-Locales for XLIFF (*.xlf) files using pure JavaScript on Node/NPM

pseudoloc-xliff.js

/**
 * Pseudo-Locales for XLIFF (*.xlf) files using pure JavaScript on Node/NPM
 *
 * Inspired by https://docs.microsoft.com/en-us/windows/win32/intl/pseudo-locales for use in Angular i18n.
 * The output file will be $SOURCE_FILE_NAME.qps-Ploc.$SOURCE_FILE_EXT compatible with Angular's format.
 *
 * Usage:
 * npm i -D pseudoloc
 * node $LOCATION/pseudoloc-xliff.js $SOURCE_FILE
 *
 * e.g inside package.json ::
 * "i18n:psedoLoc": "node ./src/locales/pseudoloc-xliff.js ./src/locales/messages.xlf"
 */

const fs = require('fs').promises;
const path = require('path');
const pseudoloc = require('pseudoloc');

(async () => {
    let arguments = process.argv.slice(2);
    if (arguments.length !== 1) {
        console.log('Only one argument allowed. Arguments received:', arguments);
        return process.exit(1);
    }

    let inputFile = arguments[0];
    let fileExtension = path.extname(inputFile);
    let fileName = path.basename(inputFile, fileExtension);
    let outputFile = path.resolve(path.dirname(inputFile), `${fileName}.qps-Ploc${fileExtension}`);

    let fileContents = await fs.readFile(inputFile, 'utf8');
    let qpsPloc = fileContents.replace(
        /(.*)<source>(.*)<\/source>/gi,
        (sourceNode, padding, sourceText) => `${sourceNode}\n${padding}<target>${pseudoloc.str(sourceText)}</target>`
    );
    await fs.writeFile(outputFile, qpsPloc);
})();