The dotenv utility allows users to load environment variables from a file named .env in the current directory by prefixing commands or using it in the shebang line of a script. The installation instructions and manpage for dotenv are provided in the README file. Users can install dotenv on a Unix-like system using a C compiler and make. The utility reads the .env file by default, loads the environment variables, and executes the specified program. Optional environment variable paths can be set. The file format consists of key-value pairs separated by an equal sign. Yifan Gu is the author of dotenv.
https://github.com/gyf304/dotenv