Mimimix is Elixir code reloader. It watches the files in Elixir and Erlang directories, and if any files change, Mimimix will automatically recompile and reload your application.

1. Create a new application:

mix new my_app

2. Add to deps:

defp deps do
  [{:mimimix, github: "evbogdanov/mimimix", only: :dev}]
end

3. Add :mimimix as a development-only app:

def application do
  dev_apps = case Mix.env == :dev do
    true -> [:mimimix]
    false -> []
  end
  [applications: dev_apps ++ my_apps]
end

Just modify your Elixir code (in the lib directory) or Erlang code (src directory), and Mimimix will do the rest.