Grep any string in NodeJS

grepKeys.js

const fs = require('fs');
const path = require('path');
const readDir = require('./readDir');

function grepKeys(sourceDir = '', outDir = '') {
  const re = /(\$t\(['"]|\$t\(\\['"]|\$t\(\\\\['"])(.*?)(['"]|\\['"]|\\\\['"])/g;

  const include = ['.vue', '.ts', 'json', '.js'];
  const exclude = ['.Stories.ts', '.stories.ts', '.spec.ts'];


  try {
    const outputPath = path.join(outDir, 'primary-keys.json');
    const files = readDir(sourceDir, { include, exclude, recursive: true });

    const keys = files.reduce((acc, item) => {
      const file = fs.readFileSync(item, 'utf8');
      const [...matches] = file.matchAll(re);
      const keys = matches.map((i) => i[2])
      acc = acc.concat(keys);

      return acc;
    }, []);

    const result = [...new Set(keys)].sort();

    fs.writeFileSync(outputPath, JSON.stringify(result));
  } catch (error) {
    throw `Localize service: ${error.message}`;
  }
}

module.exports = grepKeys;