autocomplete.exs

loadAll = fn(dir) ->
  dir
  |> Path.join("**/*.ex")
  |> Path.wildcard()
  |> Enum.map(&Code.require_file/1)
end

formatResult = fn({exists, one, multi}) ->
  [exists, one, Enum.join(multi, ",")] |> (&(Enum.join(&1, "|"))).()
end

execute = fn
  ("l", input) -> Code.require_file(input)
  ("a", input) -> IEx.Autocomplete.expand Enum.reverse to_char_list(input)
end

loop = fn(y) ->
  [command, input] = IO.gets("") |> String.split
  IO.puts formatResult.(execute.(command, input)) <> "\nok."
  y.(y)
end

[first|_] = System.argv()
loadAll.(first)
loop.(loop)