# .env.sample (Tracked by Git) DB_PASSWORD=your_database_password Use code with caution. Step 3: Secure Your Repository
If this sounds familiar, you’re missing a .env.sample file. What is a .env.sample file?
| Pitfall | Solution | |---------|----------| | .env.sample is outdated | CI test: diff .env.sample .env or use envalid | | Developer forgets to copy sample | Add postinstall script: cp -n .env.sample .env | | Real secrets accidentally in sample | Use pre-commit hook scanning for real keys | | Windows vs Unix path differences | Use relative paths or path.join() in code | | Multi-line values (e.g., private keys) | Use base64 or reference a file: # see secrets/ |
For larger applications, you might maintain multiple sample files: .env.sample
Make it a habit to update your .env.sample file the exact same time you add a new process.env variable to your application's codebase.
: Developers copy the sample file but leave placeholder values in place, leading to confusing runtime errors.
Even with good intentions, teams make mistakes. Here are the top three .env.sample anti-patterns. | Pitfall | Solution | |---------|----------| |
## Getting Started 1. Clone the environment template: ```bash cp .env.sample .env ``` 2. Open `.env` and fill in your local configuration values. Use code with caution. Automating .env.sample Validation
DATABASE_URL=postgresql://user:pass@localhost:5432/mydb API_KEY=sk_live_abc123def456 NODE_ENV=production PORT=3000
SESSION_TIMEOUT=86400
# MAX_RETRIES (int) - Number of retries for failed jobs. Default: 3 MAX_RETRIES=3
As applications grow, developers sometimes forget to update the .env.sample file when adding a new variable to .env . This leads to broken builds for teammates. You can automate this check to ensure both files stay synchronized. Using Node.js Scripting
DATABASE_URL=postgresql://user:password@localhost:5432/database_name API_KEY=your_api_key_here NODE_ENV=development PORT=3000 Here are the top three