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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 env.ex
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lib/mix/tasks/nerves/env.ex 

defmodule Mix.Tasks.Nerves.Env do

  use Mix.Task

  import Mix.Nerves.IO



  @moduledoc false



  @switches [info: :boolean, disable: :boolean]



  def run(argv) do

    debug_info("Env Start")

    {opts, _, _} = OptionParser.parse(argv, switches: @switches)



    if opts[:disable] do

      # This is the same code as Nerves.Env.disable/0, but I can't call that

      # because we're about to load it immediately below. I also can't call it

      # after it's loaded below because the act of compiling the nerves dep

      # calls deps.precomile, which causes the system to get compiled unless

      # Nerves.Env is disabled, which is what I'm trying to do here. :&

      # This could probably be solved by moving Nerves.Env into nerves_bootstrap

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

    else

      System.delete_env("NERVES_ENV_DISABLED")

    end



    unless Code.ensure_compiled?(Nerves.Env) do

      Mix.Tasks.Deps.Loadpaths.run(["--no-compile"])



      if distillery?() do

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

      end



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

    end



    Nerves.Env.start()

    debug_info("Env End")

    if opts[:info], do: print_env()

  end



  def print_env() do

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

    debug_info("Environment Package List")



    case Nerves.Env.packages() do

      [] -> Mix.shell().info("  No packages found")

      packages -> Enum.each(packages, &print_pkg/1)

    end



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

  end



  defp print_pkg(pkg) do

    Mix.shell().info("""

      Pkg:         #{pkg.app}

      Vsn:         #{pkg.version}

      Type:        #{pkg.type}

      BuildRunner: #{inspect(pkg.build_runner)}

    """)

  end



  defp distillery?() do

    Mix.Project.deps_paths()

    |> Enum.map(&elem(&1, 0))

    |> Enum.member?(:distillery)

  end

end