Internationalization project - automating the 1) process of checking if existing copy keys are being used, 2) if keys conform to BEM

.babelrc

{
  "presets": ["es2016"]
}

bem.js

const yaml = require('js-yaml');
const fs   = require('fs');
const exec = require('child_process').exec;

let doc;
const map = new Map();
const copyRepoDir = '<redacted>';

function getListing(callback) {
  let child = exec(`ls ${copyRepoDir}`, function(err, stdout, stderr) {
    let output = stdout.split('\n');
    callback(output);
  });
}

getListing(function(output) {
  let cleaned = output.filter(key => key.length > 0);
  
  Object.keys(cleaned).forEach(key => {
    if (key !== "") {
      let filename = cleaned[key];
      console.log(`Examining ${filename}...`);
  
      try {
        doc = yaml.safeLoad(fs.readFileSync(`${copyRepoDir}/${filename}`, 'utf8'));
      } catch (e) {
        console.log(e);
      }
  
      Object.keys(doc).forEach(key => {
        // H/t Samir and https://regex101.com/r/MTuw3Y/1, JavaScript flavor
        let regex = RegExp('^((([a-z0-9]+(_[a-z0-9]+)?)+((--)([a-z0-9]+(-[a-z0-9]+)?)+)?)|(([a-z0-9]+(_[a-z0-9]+)?)+__([a-z0-9]+(_[a-z0-9]+)?)+((--)([a-z0-9]+(-[a-z0-9]+)?)+)?))$');
        let result = regex.test(key);
  
        if (!result) {
          console.log(`${key} is not valid BEM`);  
        }
      });
      console.log('----------');
    }
  });
});

console.log(`Done checking components in ${copyRepoDir}`);

checker.js

const exec = require('child_process').exec;

const data = {
  'key': '...'
  ...
};

const map = new Map();
Object.keys(data).forEach(key => {
    map.set(key, data[key]);
});

const appDir = '<redacted>';

map.forEach(function(item, index) {
  let command = `grep -rnwl '${index}' ${appDir}/**/*.html`;
  exec(command, outputString, function (err, stdout, stderr) {
    if (err && err.code === 1) {
      count = 0; // Status 1 means no match, so we don't have to parse anything.
      console.log(`${index} not found.`);
      // console.log(`stderr: ${stderr}`);
    } else {
      console.log(`${index} was found, ${stdout}`);  
    }
  });
});

package.json

{
  "name": "speedo",
  "version": "0.0.1",
  "description": "",
  "main": "checker.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "rimraf dist/ && babel ./ --out-dir dist/ --ignore ./node_modules,./.babelrc,./package.json,./npm-debug.log --copy-files",
    "start": "npm run build && node dist/checker.js"
  },
  "author": "Mina Demian",
  "license": "ISC",
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-es2016": "^6.24.1",
    "rimraf": "^2.6.2"
  }
}