LoadEnv

This is effectively a port of dotenv, whose README explains it best:

/Storing configuration in the environment is one of the tenets of a twelve-factor app. Anything that is likely to change between deployment environments–such as resource handles for databases or credentials for external services–should be extracted from the code into environment variables./

/But it is not always practical to set environment variables on development machines or continuous integration servers where multiple projects are run. dotenv loads variables from a .env file into ENV when the environment is bootstrapped./

https://github.com/bkeepers/dotenv

This library exposes functions for doing just that.

Documentation

loadEnv :: IO ()

loadEnvFrom ".env"

loadEnvFrom :: FilePath -> IO ()

Parse the given file and set variables in the process's environment

Variables can be declared in the following form:

FOO=bar
FOO="bar"
FOO='bar'

Declarations may optionally be preceded by "export ", which will be ignored. Trailing whitespace is ignored. Quotes inside quoted values or spaces in unquoted values must be escaped with a backlash. Invalid lines are silently ignored.

NOTE: If the file-name is relative, the directory tree will be traversed up to / looking for the file in each parent. Use loadEnvFromAbsolute to avoid this.

loadEnvFromAbsolute :: FilePath -> IO ()

loadEnvFrom, but don't traverse up the directory tree