How do I read config variables in a non-Phoenix app?

Questions / Help
1

I have a config.exs file in my config/ directory, located at the project root:

import Config

config :iex, default_prompt: ">>>"

config :my_app, 
  key1: “value1”

import_config “#{Mix.env()}.exs”

When I start my app via shell iex -S mix, not only can I not read my key1 variable, but the default prompt has not changed. This tells me that the app is not reading my config file.

Just for context, this is the structure of my project directory:

~/
  lib/
    config/
      config.exs
    application.ex

This is my application file:

defmodule My.Application do                                                                                                                          
  @moduledoc "Application file"                                                    
                                                                                   
  use Application                                                                  
                                                                                   
  def start(_type, _args) do                                                       
    children = [                                                                   
      Plug.Cowboy.child_spec(                                                      
        scheme: :http,                                                             
        plug: My.Web.Endpoint,                                                   
        options: [port: 8000]                                                      
      )                                                                            
    ]                                                                              
                                                                                   
    opts = [strategy: :one_for_one, name: Blog.Supervisor]                         
    IO.puts("Starting...")                                                         
    Supervisor.start_link(children, opts) |> IO.inspect                            
  end                                                                              
end

and my mix file:

defmodule My.MixProject do                                                       
  use Mix.Project                                                                  
                                                                                   
  def project do                                                                   
    [                                                                              
      app: :my_app,                                                                                                                                      
      version: "0.1.0",                                                            
      elixir: "~> 1.10",                                                           
      start_permanent: Mix.env() == :prod,                                         
      deps: deps()                                                                 
    ]                                                                              
  end                                                                              
                                                                                   
  # Run "mix help compile.app" to learn about applications.                        
  def application do                                                               
    [                                                                              
      extra_applications: [:logger],                                               
      mod: {My.Application, []}                                                  
    ]                                                                              
  end                                                                              
                                                                                   
  # Run "mix help deps" to learn about dependencies.                               
  defp deps do                                                                     
    [                                                                              
      { :plug_cowboy, "~> 2.0" }                                                   
    ]                                                                              
  end                                                                              
end

What am I doing wrong?

2

Your config directory should be in the root of your project, not in the lib directory.