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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



  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([])

      parent = Mix.Project.config()[:app]

      system_app = Nerves.Env.system().app



      {m, f, a} =

        if parent == system_app do

          Mix.Tasks.Deps.Compile.run([Nerves.Env.toolchain().app, "--include-children"])

          {Mix.Tasks.Compile, :run, [["--no-deps-check"]]}

        else

          system_app_name = to_string(system_app)

          {Mix.Tasks.Deps.Compile, :run, [[system_app_name, "--include-children"]]}

        end



      apply(m, f, a)

      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:

        

        defp aliases(_target) do

          [

            # Add custom mix aliases here

          ]

          |> Nerves.Bootstrap.add_aliases()

        end



      """)

    end

  end



end