defmodule Mix.Tasks.Compile.NervesPackage do
  use Mix.Task
  import Mix.Nerves.IO

  require Logger

  @moduledoc """
    Build a Nerves Artifact from a Nerves Package
  """

  @shortdoc "Nerves Package Compiler"
  @recursive true

  def run(_args) do
    debug_info "Compile.NervesPackage start"
    config = Mix.Project.config

    Nerves.Env.start
    Nerves.Env.ensure_loaded(Mix.Project.config[:app])

    package = Nerves.Env.package(config[:app])
    toolchain = Nerves.Env.toolchain
    ret = 
      if Nerves.Env.enabled? and Nerves.Artifact.stale?(package) do
        Nerves.Artifact.build(package, toolchain)
        :ok
      else
        :noop
      end

    debug_info "Compile.NervesPackage end"
    ret
  end

end