Distillery release migration commands

config.exs

# distillery rel/config.exs sample content for linking up migration tasks
Path.join(["rel", "plugins", "*.exs"])
|> Path.wildcard()
|> Enum.map(&Code.eval_file(&1))

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

environment :prod do
  set include_erts: true
  set include_src: false
  set cookie: :"<G,>[;G>bCk]9{YJA4ydOT8aarJBIi;F:oh:$<>~(DG7S03b3EzVr)~b`,%aV@<zi@"
  set vm_args: "rel/vm.args"
end

release :my_app do
  set version: current_version(:my_app)
  set applications: [
    my_app: :permanent
  ]
  set commands: [
    # Develop and have your my_db_migrate_script.sh script located in my_app/priv/commands/my_db_migrate_script.sh
    "ecto.migrate": Path.join([:code.priv_dir(:my_app), "commands", "my_db_migrate_script.sh"])
  ]
end