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nerves_bootstrap

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Nerves mix integration bootstrap and new project generator

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nerves_bootstrap test mix_helper.exs
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test/mix_helper.exs 

Mix.shell(Mix.Shell.Process)



defmodule MixHelper do

  @moduledoc false



  import ExUnit.Assertions



  # Much <3 to Phoenix for this code

  @spec tmp_path() :: binary()

  def tmp_path() do

    Path.expand("../../tmp", __DIR__)

  end



  @spec in_tmp(atom(), (-> any())) :: any()

  def in_tmp(which, function) do

    path = Path.join(tmp_path(), to_string(which))

    File.rm_rf!(path)

    File.mkdir_p!(path)

    File.cd!(path, function)

  end



  @spec assert_file(File.t()) :: :ok | no_return()

  def assert_file(file) do

    assert File.regular?(file), "Expected #{file} to exist, but does not"

  end



  @spec refute_file(File.t()) :: :ok | no_return()

  def refute_file(file) do

    refute File.regular?(file), "Expected #{file} to not exist, but it does"

  end



  @spec assert_file(File.t(), (binary() -> :ok)) :: :ok | no_return()

  def assert_file(file, match) when is_function(match, 1) do

    assert_file(file)

    match.(File.read!(file))

  end

end