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toolshed lib_src core top.ex
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lib_src/core/top.ex 

defmodule Toolshed.Core.Top do

  alias Toolshed.Top.Server



  @default_rows 23

  @default_columns 80



  @doc """

  Interactively show the top Elixir processes



  This is intended to be called from the IEx prompt and will periodically

  update the console with the top processes. Press enter to exit.



  Options:



  * `:order` - the sort order for the results (`:reductions`, `:delta_reductions`,

    `:mailbox`, `:delta_mailbox`, `:total_heap_size`, `:delta_total_heap_size`, `:heap_size`,

    `:delta_heap_size`, `:stack_size`, `:delta_stack_size`)

  """

  @spec top(keyword()) :: :"do not show this result in output"

  def top(opts \\ []) do

    options = %{

      order: Keyword.get(opts, :order, :delta_reductions),

      rows: rows(),

      columns: columns()

    }



    IO.puts("Press enter to stop\n")



    {:ok, pid} = Server.start_link(options)

    _ = IO.gets("")

    Server.stop(pid)



    IEx.dont_display_result()

  end



  defp rows() do

    case :io.rows() do

      {:ok, rows} -> rows

      _ -> @default_rows

    end

  end



  defp columns() do

    case :io.columns() do

      {:ok, columns} -> columns

      _ -> @default_columns

    end

  end

end