有没有办法验证代码中的所有环境变量是否都存在于 .env 文件中？

Question

I'm trying to find a way to validate if all of the environment variables used in the code are actually set in the.env file

Something like a test to run in the pipeline that throw a warning if I'm missing a variable in the environment I'm currently deploying.

Context

Nodejs

It is a big application with a lot of environment variables.

There are multiple environments dev, qa, prod.

I'm using the package dotenv

dotenv.config()

process.env.A_VARIABLE

Answer 1

There is actually a package targeting exactly this issue: https://github.com/af/envalid

You can define a required schema for the .env file; if a condition is not met, it will end the process with a proper error message.

Furthermore, there are nice features like providing default values and loading a sanitized and typesafe env object for further usage in your application.