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An Elixir module to easily create and use temporary files and directories.

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temp lib temp tracker.ex
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lib/temp/tracker.ex 

defmodule Temp.Tracker do

  use GenServer



  def init(_args) do

    Process.flag(:trap_exit, true)

    {:ok, HashSet.new}

  end



  def handle_call({:add, item}, _from, state) do

    {:reply, item, HashSet.put(state, item)}

  end



  def handle_call(:tracked, _from, state) do

    {:reply, state, state}

  end



  def handle_call(:cleanup, _from, state) do

    {removed, failed} = cleanup(state)

    {:reply, removed, Enum.into(failed, HashSet.new)}

  end



  def terminate(_reason, state) do

    cleanup(state)

    :ok

  end



  defp cleanup(state) do

    Enum.partition state, fn path ->

      case File.rm_rf(path) do

        {:ok, _} -> true

        _ -> false

      end

    end

  end

end