@spec ensure_module_loaded_before_first_runnable_instructions(
  Edeliver.Relup.Instructions.t() | Edeliver.Relup.Instructions.instructions(),
  runnable_instruction ::
    {:apply, {module :: module(), :run, arguments :: [term()]}}
) ::
  updated_instructions ::
  Edeliver.Relup.Instructions.t() | Edeliver.Relup.Instructions.instructions()

Ensures that the module of Edeliver.Relup.RunnableInstruction is loaded before it is executed.

E.g. if an Edeliver.Relup.Instructions.Info instruction implements the behaviour Edeliver.Relup.RunnableInstruction it creates and inserts a:

  {:apply, {Elixir.Edeliver.Relup.Instructions.Info, :run, ["hello"]}}

relup instruction. This function ensures that the instruction which loads that module is placed before that instruction. This is essential if the Edeliver.Relup.RunnableInstruction is new and was not included into the old version of the release or has changed in the new version.

@spec ensure_module_loaded_before_first_runnable_instructions(
  Edeliver.Relup.Instructions.t() | Edeliver.Relup.Instructions.instructions(),
  runnable_instruction ::
    {:apply, {module :: module(), :run, arguments :: [term()]}},
  module :: module()
) ::
  updated_instructions ::
  Edeliver.Relup.Instructions.t() | Edeliver.Relup.Instructions.instructions()

Ensures that the given module is loaded before the first occurrence of the runnable instruction.

If an %Edeliver.Relup.Instructions{} is given containing also the down instructions, it ensures that the module is unloaded after the last occurrence of the runnable down instruction. Use this function instead of the ensure_module_loaded_before_instruction/3 function if the Edeliver.Relup.RunnableInstruction can be used several times in a Edeliver.Relup.Modification. If the module did not change and was already included into the old release this function has no effect.

@spec ensure_module_loaded_before_instruction(
  Edeliver.Relup.Instructions.t() | Edeliver.Relup.Instructions.instructions(),
  instruction :: Edeliver.Relup.Instructions.instruction(),
  module :: module()
) ::
  updated_instructions ::
  Edeliver.Relup.Instructions.t() | Edeliver.Relup.Instructions.instructions()

Ensures that the given module is loaded before the given instruction (if it needs to be loaded).

If an %Edeliver.Relup.Instructions{} is given containing also the down instructions, it ensures that the module is unloaded after the instruction for the down instructions. Use this function only, if the instruction should be used only once in a Relup.Modification for the up or down instructions. Use the ensure_module_loaded_before_first_runnable_instructions/2 function instead if the RunnableInstruction can be used several times in a Relup.Modification.

@spec ensure_module_unloaded_after_instruction(
  Edeliver.Relup.Instructions.t() | Edeliver.Relup.Instructions.instructions(),
  instruction :: Edeliver.Relup.Instructions.instruction(),
  module :: module()
) ::
  updated_instructions ::
  Edeliver.Relup.Instructions.t() | Edeliver.Relup.Instructions.instructions()

Ensures that the given module is (un)loaded after the given instruction (if it needs to be (un)loaded).

If an %Edeliver.Relup.Instructions{} is given containing also the down instructions, it ensures that the module is (un)loaded before the instruction for the down instructions. Use this function only, if the instruction should be used only once in a Relup.Modification for the up or down instructions. Use the ensure_module_unloaded_after_last_runnable_instruction/2 function instead if the RunnableInstruction can be used several times in a Relup.Modification.

Ensures that the module of Edeliver.Relup.RunnableInstruction is unloaded after it was executed.

E.g. if an Edeliver.Relup.Instructions.Info instruction implements the behaviour Edeliver.Relup.RunnableInstruction it creates and inserts a

  {:apply, {Elixir.Edeliver.Relup.Instructions.Info, :run, ["hello"]}}

relup instruction. This function ensures that the instruction which unloads that module is placed after that instruction. This is essential if the Edeliver.Relup.RunnableInstruction was changed and the new version is unloaded in the downgrade instructions.

@spec ensure_module_unloaded_after_last_runnable_instruction(
  Edeliver.Relup.Instructions.t() | Edeliver.Relup.Instructions.instructions(),
  runnable_instruction ::
    {:apply, {module :: module(), :run, arguments :: [term()]}},
  module :: module()
) ::
  updated_instructions ::
  Edeliver.Relup.Instructions.t() | Instruction.instructions()

Ensures that the given module is (un)loaded after the last occurrenct of the given runnable instruction.

If an %Edeliver.Relup.Instructions{} is given containing also the down instructions, it ensures that the module is loaded before the first occurrence of the runnable instruction for the down instructions. Use this function instead of the ensure_module_unloaded_after_instruction/3 function if the RunnableInstruction can be used several times in a Relup.Modification.

@spec first_runnable_instruction(
  instructions :: Edeliver.Relup.Instructions.instructions(),
  module :: module()
) ::
  runnable_instruction ::
  {:apply, {module :: module(), :run, arguments :: [term()]}} | :not_found

Returns the first occurrence of a RunnableInstruction implemented by the given module.