Deployed, 500'd, forgot the env var again. I built a pre-deploy gate

说明与用途

使用 dotenv-diff 在部署前验证环境变量，防止因缺失变量导致的 500 错误。

问题

Deploying an app fails with a 500 error because a required environment variable is missing in production.

结果

Using dotenv-diff as a pre-deploy gate prevents runtime failures caused by missing environment variables, ensuring the deployed environment matches the development configuration.

工作流

• 1. Download dotenv-diff script: curl -O https://raw.githubusercontent.com/hahahahahahahahah6/dotenv-diff/main/dotenv_diff.py && chmod +x dotenv_diff.py
• 2. Run dotenv-diff against the current .env: ./dotenv_diff.py
• 3. Review output for missing, extra, empty, or placeholder entries
• 4. If any errors are reported, fix the .env file or add the missing variables
• 5. Re-run dotenv-diff to confirm no errors
• 6. Proceed with deployment

证据

dotenv-diff turns that checklist line into a command. Diff .env against .env.example and catch missing keys before deploy, not after

来源

ERRORS: [missing] STRIPE_WEBHOOK_SECRET WARNINGS: [extra] LEGACY_MAILGUN_KEY [placeholder] DATABASE_URL (value: 'postgres://changeme@localhost/db') 1 error(s), 2 warning(s)

来源

This is not a secret manager. It doesn't encrypt, sync, or rotate anything — it's a ~200-line gate that answers one question: does the env this code runs with match the env the code was written against?

来源