Example usage for config.ex

foo.ex

defmodule Foo do
  use Config
  
  cfg :disable_foo?, :boolean
  cfg :bar_delay, :integer
  cfg :baz_name
  cfg :blahs, {:list, :float}
  cfg :blerks, {:set, :atom}
  
  def print_stuff do
    IO.puts "Disable foo? #{disable_foo?}"
    IO.puts "Bar delay: #{bar_delay}"
    IO.puts "Baz name: #{baz_name}"
    IO.puts "Blahs: #{inspect blahs}"
    IO.puts "Blerks: #{inspect blerks}"
  end
end

#####
# Example config.exs

use Mix.Config

config :my_app, Foo,
  disable_foo?: false,
  bar_delay: 42,
  baz_name: "Baz, James Baz",
  blahs: [1.23, 4.56, 7.89],
  blerks: MapSet.new([:green_eggs, :ham])

#####
# Example environment variables

# FOO_DISABLE_FOO=true
# FOO_BAR_DELAY=747
# FOO_BAZ_NAME='James T. Kirk'
# FOO_BLAHS=9.87,6.54,3.21
# FOO_BLERKS=spam,jam