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nerves_bootstrap

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Nerves mix integration bootstrap and new project generator

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nerves_bootstrap lib mix tasks nerves precompile.ex
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lib/mix/tasks/nerves/precompile.ex 

defmodule Mix.Tasks.Nerves.Precompile do

  use Mix.Task

  import Mix.Nerves.IO



  @moduledoc false



  def run(_args) do

    debug_info("Precompile Start")



    # Note: We have to directly use the environment variable here instead of

    # calling Nerves.Env.enabled?/0 because the nerves.precompile step happens

    # before the nerves dependency is compiled, which is where Nerves.Env

    # currently lives. This would be improved by moving Nerves.Env to

    # nerves_bootstrap.

    unless System.get_env("NERVES_ENV_DISABLED") do

      System.put_env("NERVES_PRECOMPILE", "1")



      Mix.Project.config()[:aliases]

      |> check_aliases()



      Mix.Tasks.Nerves.Env.run([])



      Nerves.Env.packages()

      |> Enum.each(&compile/1)



      Mix.Task.reenable("deps.compile")

      Mix.Task.reenable("compile")



      System.put_env("NERVES_PRECOMPILE", "0")



      Mix.Task.rerun("nerves.loadpaths")

    end



    debug_info("Precompile End")

  end



  def check_aliases(aliases) do

    deps_get = Keyword.get(aliases, String.to_atom("deps.get"), [])



    unless Enum.member?(deps_get, "nerves.deps.get") do

      Mix.raise("""



        Nerves is missing an alias for \"deps.get\"

        Please update nerves to the latest version:



        mix deps.update nerves

        

        Also update your mix.exs target aliases to:

        

        aliases: ["loadconfig": [&bootstrap/1]]



        and add the following function to your mix file



        def bootstrap(args) do

          Application.start(:nerves_bootstrap)

          Mix.Task.run("loadconfig", args)

        end



      """)

    end

  end



  defp compile(%{app: app}) do

    cond do

      Mix.Project.config()[:app] == app ->

        Mix.Tasks.Compile.run([app, "--include-children"])



      true ->

        Mix.Tasks.Deps.Compile.run([app, "--no-deps-check", "--include-children"])

    end

  end

end