We have developed dotenv-linter — a useful tool for checking .env files. It helps to find problems in .env files that you might miss at first, but that later may result in applications working incorrectly. We made the tool universal so it can be connected to any project, regardless of the programming language. Dotenv-linter is developed as an open-source project by Mikhail Grachev, Evrone’s software engineer.
What Is a .env File?
A .env file or a dotenv file is a simple text file that contains all the environment variables of a project. Storing configuration in the environment variables is one of the tenets of the Manifesto of Twelve-Factor App. The .env file has a simple key-value format.