Can't pass stderr: :stdout or stdout: :stderr

[ivan]

@type command_option :: lists

    {:stdout, :stderr | output_device_option} |
    {:stderr, :stdout | output_device_option} |

but neither stderr: :stdout or stdout: :stderr work; e.g.

Exexec.run(["/usr/bin/ssh" | args], stdout: true, stderr: :stdout, sync: true, env: env)

yields

** (FunctionClauseError) no function clause matching in Exexec.ToErl.output_device_option_to_erl/1
    (exexec) lib/exexec/to_erl.ex:76: Exexec.ToErl.output_device_option_to_erl(:stdout)
    (exexec) lib/exexec/to_erl.ex:72: Exexec.ToErl.command_option_to_erl/2
    (exexec) lib/exexec/to_erl.ex:14: anonymous fn/2 in Exexec.ToErl.command_options_to_erl/1
    (elixir) lib/enum.ex:1774: Enum."-reduce/3-lists^foldl/2-0-"/3
    (exexec) lib/exexec/to_erl.ex:13: Exexec.ToErl.command_options_to_erl/1
    (exexec) lib/exexec.ex:125: Exexec.run/2
    [...]

This fixes it, but I don't know if it's the right place to fix it:

diff --git a/lib/exexec/to_erl.ex b/lib/exexec/to_erl.ex
index 0abf38c..444d79f 100644
--- a/lib/exexec/to_erl.ex
+++ b/lib/exexec/to_erl.ex
@@ -76,6 +76,8 @@ defmodule Exexec.ToErl do
   def output_device_option_to_erl(:null), do: :null
   def output_device_option_to_erl(:close), do: :close
   def output_device_option_to_erl(:print), do: :print
+  def output_device_option_to_erl(:stdin), do: :stdin
+  def output_device_option_to_erl(:stdout), do: :stdout
   def output_device_option_to_erl(path) when is_binary(path), do: to_char_list(path)
   def output_device_option_to_erl(pid) when is_pid(pid), do: pid
   def output_device_option_to_erl(fun) when is_function(fun, 3), do: fun

[lessless]

@ericentin I'm considering to use exexec and this issue seems to be a real thing, as well as #3 . Do you have time to address them?

[ericentin]

Should be fixed.