floof/mix.exs

defmodule Floof.MixProject do
  use Mix.Project

  def project do
    [
      app: :floof,
      version: "0.1.0",
      elixir: "~> 1.13",
      start_permanent: Mix.env() == :prod,
      compilers: [:asn1] ++ Mix.compilers(),
      asn1_options: [:per],
      deps: deps(),
      package: package()
    ]
  end

  # Run "mix help compile.app" to learn about applications.
  def application do
    [
      extra_applications: [:asn1, :crypto, :logger],
      mod: {Floof.Application, []},
      env: [
        # listen_port cam be set to `nil` to disable to server-socket listener
        listen_port: 2540,
        # listen_opts can be used to specify e.g. `[ip: {192,168,0,133}]` a specific interface IP
        listen_opts: [],
        # upstreams have structure `{host, port}` or `{host}` (port defaults to 2540)
        upstreams: [],
        # markers have the structure {bool(), {:RelativeDistinguishedName, oid-as-list(), value()}}
        # all of the markers marked with 'true' should be included in each message to-be-processed
        # and none of the markers marked with 'false' should be included. the same holds for attrs.
        markers: [],
        attrs: [],
        # these are the markers of form {:RelativeDistinguishedName, oid-as-list(), value()}
        # which get added to all processed messages
        set_markers: [],
        # a list of functions which can be used to further filter packets
        # (by returning nil if unwanted) and modify them
        extra_filters: [],
        # file locations
        #  the spool dir saves messages in-transit, and is used to prevent RAM OOM
        spool_dir: "mock_spool",
        #  the sessions file is used for persistence of session data across restarts
        sessions_file: "mock_sessions.dets"
      ]
    ]
  end

  defp package do
    [
      maintainers: ["Alain Zscheile"],
      licenses: ["Apache-2.0"]
    ]
  end

  # Run "mix help deps" to learn about dependencies.
  defp deps do
    [
      {:enacl, "~> 1.0.0"},
      {:logger_file_backend, "~> 0.0.13"}
      # {:dep_from_hexpm, "~> 0.3.0"},
      # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
    ]
  end
end

# source: https://github.com/processone/ejabberd/blob/441eca75b23ecc3fd2ae35655d23061fb28cdefa/mix.exs
defmodule Mix.Tasks.Compile.Asn1 do
  use Mix.Task
  alias Mix.Compilers.Erlang

  @recursive true
  @manifest ".compile.asn1"

  def run(args) do
    {opts, _, _} = OptionParser.parse(args, switches: [force: :boolean])

    project = Mix.Project.config()
    source_paths = project[:asn1_paths] || ["asn1"]
    dest_paths = project[:asn1_target] || ["src"]
    mappings = Enum.zip(source_paths, dest_paths)
    options = project[:asn1_options] || []

    force =
      case opts[:force] do
        true -> [force: true]
        _ -> [force: false]
      end

    Erlang.compile(manifest(), mappings, :asn1, :erl, force, fn
      input, output ->
        File.mkdir(Path.dirname(output))
        options = options ++ [:noobj, outdir: Erlang.to_erl_file(Path.dirname(output))]

        case :asn1ct.compile(Erlang.to_erl_file(input), options) do
          :ok -> {:ok, [], []}
          :error -> {:error, [], []}
        end
    end)
  end

  def manifests, do: [manifest()]
  defp manifest, do: Path.join(Mix.Project.manifest_path(), @manifest)

  def clean, do: Erlang.clean(manifest())
end