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errx

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Initially build to reduce the author's pain point when using erlang tuple style error handling where it has no information of who create the error tuple.

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errx lib errx.ex
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lib/errx.ex 

defmodule Errx do

  @derive Jason.Encoder

  defstruct [:file, :func, :reason]



  def new(error) do

    {mod, fname, farity, [file: file, line: line]} =

      Process.info(self(), :current_stacktrace) |> elem(1) |> Enum.fetch!(2)



    func = "#{mod}.#{fname}/#{farity}"

    file = "#{file}:#{line}"



    case error do

      {:error, reason} ->

        {:error, %Errx{func: func, file: file, reason: reason}}



      _ ->

        {:error, %Errx{func: func, file: file, reason: error}}

    end

  end



  def error(error) do

    case error do

      {:error, errx = %Errx{}} ->

        %{reason: reason} = errx

        reason



      {:error, reason} ->

        reason



      _ ->

        error

    end

  end

end