A simple Elixir library to load environment variables from .env and environment specific env files like .env.dev, .env.test, etc.

Add envy to your dependencies in mix.exs.

def deps do
  [
    {:envy, "~> 1.1.1"},
  ]
end

To load env files you have two options, you can use the autoloader or give the library paths to specific files to load itself.

Using auto_load you can add the following to your application in lib/my_application.ex:

defmodule MyApplication do
  use Application

  def start(_type, _args) do
    unless Mix.env == :prod do
      Envy.auto_load
    end
    # Existing code
  end
end

This will look for .env and the mix env specific file. For example if your applications Mix.env is dev then envy will attempt to load .env.dev

You can also specify which files to load manually using Envy.load which accepts a list of files to attempt to load.

Envy.load([".env"])

To export FOO as bar you can add the following line to your env file.

foo=bar

Comments can be added with a #.

foo=bar # comments

If you need to use # in your values you can use double quotes.

tag="#bar" #comments

If you need environment variables set by envy in config/ files you can load your env files with Envy.auto_load or Envy.load then call Envy.reload_config to re-evaluate the config files with the correct environment variables set.