AndrewDryga

use Mix.Releases.Config,
  # This sets the default release built by `mix release`
  default_release: :default,
  # This sets the default environment used by `mix release`
  default_environment: :default

environment :default do
  # Copy files into release instead of creating symlink for them
  set dev_mode: false
  # Do not include ERTS

AndrewDryga

config :myapp_api, :third_party_lib,
  cloud_name:    "${CLOUDINARY_CLOUD_NAME}",
  bucket_name:   "${CLOUDINARY_BUCKET_NAME}",
  bucket_region: "${CLOUDINARY_BUCKET_REGION}",
  frontend_url:  "${FRONTEND_URL}"

AndrewDryga

defmodule MyAppAPI.Repo do
  use Ecto.Repo, otp_app: :myapp_api
  
  def init(_type, config) do
    url = System.get_env("DATABASE_URL")
    if url, do: {:ok, [url: url] ++ config}, else: {:ok, config}
  end
end

AndrewDryga

defmodule MyAppAPI.Endpoint do
  use Phoenix.Endpoint, otp_app: :myapp_api
  
  # ...
  
  @doc """
  Callback invoked for dynamically configuring the endpoint.
  It receives the endpoint configuration and checks if
  configuration should be loaded from the system environment.
  """

AndrewDryga

defmodule MyAppAPI.Changeset do
  import Ecto.Changeset
  
  @on_load :load_buckets
  
  # ...
  
  def load_buckets do
    known_buckets = "KNOWN_BUCKETS" |> System.get_env() |> String.split(",", trim: true)
    Application.put_env(:myapp_api, :known_buckets, known_buckets)

AndrewDryga

defmodule MyAppAPI.Changeset do
  import Ecto.Changeset
  
  @known_buckets Application.get_env(:myapp_api, :known_buckets)
  
  # ...
  
  def changeset(schema, attrs) do
    schema
    |> cast(attrs, @fields)

AndrewDryga

defmodule MyAppAPI.ReleaseTasks do
  alias Ecto.Migrator

  @otp_app :myapp_api
  @start_apps [:logger, :ssl, :postgrex, :ecto]

  def migrate do
    init(@otp_app, @start_apps)

    run_migrations_for(@otp_app)

AndrewDryga

#!/usr/bin/env bash
/app/bin/myapp command "Elixir.MyAppAPI.ReleaseTasks" migrate

AndrewDryga

use Mix.Releases.Config,
  default_release: :default,
  default_environment: :default

environment :default do
  set dev_mode: false
  set include_erts: false
  set include_src: false
  set cookie: :"this_is_a_secret"
  # Add release commands

AndrewDryga

release: /app/bin/myapp migrate
web: /app/bin/myapp foreground