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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.bootstrap.ex
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lib/mix/tasks/nerves.bootstrap.ex 

# SPDX-FileCopyrightText: 2022 Jon Carstens

# SPDX-FileCopyrightText: 2025 Frank Hunleth

#

# SPDX-License-Identifier: Apache-2.0

#

defmodule Mix.Tasks.Nerves.Bootstrap do

  # Bootstrap Nerves tooling into the current Mix tooling

  #

  # The purpose of this task is to ensure the Nerves integration is compiled

  # first and available to be injected into the Mix tooling since Nerves.Bootstrap

  # is available as an archive. (i.e. this is like having `:nerves` as a

  # dependency of this archive even though archives do not allow traditional

  # dependencies)

  #

  # It is not intended to be run manually



  @moduledoc false

  use Mix.Task



  alias Nerves.Bootstrap.UpdateChecker



  @impl Mix.Task

  def run(_args) do

    nerves_ver = nerves_version()



    if is_nil(nerves_ver) do

      Mix.raise(":nerves is required as a dependency of this project")

    end



    if Version.match?(nerves_ver, "< 1.8.0") do

      Mix.raise("""

      You are using :nerves #{nerves_ver} which is incompatible with this version

      of nerves_bootstrap and will result in compilation failures.



      Please update to :nerves >= 1.8.0 or downgrade your nerves_bootstrap <= 1.11.5

      """)

    end



    if Mix.target() != :host and not Code.ensure_loaded?(Nerves.Env) do

      # The tooling mix tasks are maintained in :nerves so we need to

      # ensure it is compiled here first so the tasks are available.

      # If the target is host, then this will be handled by the regular

      # compilation process

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

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

    end



    UpdateChecker.check()

  end



  defp nerves_version() do

    if path = Mix.Project.deps_paths()[:nerves] do

      Mix.Project.in_project(:nerves, path, fn _ -> Mix.Project.config()[:version] end)

    end

  catch

    _, _ -> nil

  end

end