check-my-env/index.js

Scans your code for used process.env variables and checks if they're defined in your .env

const fs = require('fs');
const path = require('path');
const dotenv = require('dotenv');
const glob = require('glob');

// Load env vars from .env
dotenv.config();

function getEnvVarsUsedInCode(dir) {
  const files = glob.sync(`${dir}/**/*.{js,ts,jsx,tsx}`, {
    ignore: ['node_modules/**', 'dist/**', 'build/**'],
  });

  const regex = /process\.env\.([a-zA-Z_][a-zA-Z0-9_]*)/g;
  const vars = new Set();

  files.forEach(file => {
    const content = fs.readFileSync(file, 'utf8');
    let match;
    while ((match = regex.exec(content)) !== null) {
      vars.add(match[1]);
    }
  });

  return Array.from(vars);
}

function checkEnvUsage(rootDir = process.cwd()) {
  const usedEnvVars = getEnvVarsUsedInCode(rootDir);
  const missing = usedEnvVars.filter(key => !process.env[key]);

  if (missing.length > 0) {
    console.error(`❌ Missing the following environment variables used in code:\n${missing.map(k => `- ${k}`).join('\n')}`);
    process.exit(1);
  } else {
    console.log('✅ All environment variables used in code are present in .env');
  }
}

checkEnvUsage();