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ex_debug_toolbar

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A debug web toolbar for Phoenix projects to display all sorts of information about request

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ex_debug_toolbar lib ex_debug_toolbar breakpoint iex shell.ex
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lib/ex_debug_toolbar/breakpoint/iex/shell.ex 

defmodule ExDebugToolbar.Breakpoint.IEx.Shell do

  @moduledoc false



  @default_cmd """

    stty echo

    clear

    iex -S mix breakpoint.client --breakpoint-file %{breakpoint_file}

  """



  alias ExDebugToolbar.Breakpoint



  def start(breakpoint) do

    with {:ok, _} <- Temp.track,

         breakpoint_file <- breakpoint_file(breakpoint),

         {:ok, pid, _os_pid} <- start_shell_process(),

         :ok <- start_iex_process(pid, breakpoint_file),

      do: {:ok, pid}

    else error -> error

  end



  def stop(pid), do: :exec.stop(pid)



  def send_input(pid, input), do: :exec.send(pid, input)



  defp breakpoint_file(breakpoint) do

    serialized_breakpoint = breakpoint |> Breakpoint.serialize!

    Temp.open! "breakpoint", &IO.write(&1, serialized_breakpoint)

  end

  

  defp start_shell_process do

    :exec.run('$SHELL', [:stdin, :stdout, :stderr, :pty])

  end



  defp start_iex_process(pid, breakpoint_file) do

    :ex_debug_toolbar

    |> Application.get_env(:iex_shell_cmd, @default_cmd)

    |> String.replace("%{breakpoint_file}", breakpoint_file)

    |> (&:exec.send(pid, &1)).()

  end

end