mix.exs

defmodule Circuits.Cdev.MixProject do
  use Mix.Project

  @version "0.1.0"
  @source_url "https://github.com/elixir-circuits/circuits_cdev"

  def project do
    [
      app: :circuits_cdev,
      version: @version,
      elixir: "~> 1.9",
      description: description(),
      package: package(),
      source_url: @source_url,
      compilers: [:elixir_make | Mix.compilers()],
      make_targets: ["all"],
      make_clean: ["clean"],
      docs: docs(),
      aliases: [format: [&format_c/1, "format"]],
      start_permanent: Mix.env() == :prod,
      build_embedded: true,
      dialyzer: [
        flags: [:unmatched_returns, :error_handling, :race_conditions, :underspecs]
      ],
      deps: deps(),
      preferred_cli_env: %{docs: :docs, "hex.publish": :docs, "hex.build": :docs}
    ]
  end

  def application do
    [
      extra_applications: [:logger],
      mod: {Circuits.Cdev.Application, []}
    ]
  end

  defp description do
    "Drive GPIOs using the Linux cdev interface"
  end

  defp package do
    %{
      files: [
        "lib",
        "src/*.[ch]",
        "mix.exs",
        "README.md",
        "LICENSE",
        "CHANGELOG.md",
        "Makefile"
      ],
      licenses: ["Apache-2.0"],
      links: %{"GitHub" => @source_url}
    }
  end

  defp deps do
    [
      {:elixir_make, "~> 0.6", runtime: false},
      {:ex_doc, "~> 0.28.0", only: :docs, runtime: false},
      {:dialyxir, "~> 1.2.0", only: :dev, runtime: false}
    ]
  end

  defp docs do
    [
      extras: ["README.md"],
      main: "readme",
      source_ref: "v#{@version}",
      source_url: @source_url
    ]
  end

  defp format_c([]) do
    case System.find_executable("astyle") do
      nil ->
        Mix.Shell.IO.info("Install astyle to format C code.")

      astyle ->
        System.cmd(astyle, ["-n", "src/*.c"], into: IO.stream(:stdio, :line))
    end
  end

  defp format_c(_args), do: true
end