I use local adapter and transform like this

  def transform(:file_format, _) do
    {:convert, "-format png", :png}
  end

Then I found it will generate a temporary file in temp folder.And I read the code in convert.ex and find this

    new_path = Arc.File.generate_temporary_path(file)

So I need to delete them manually. Do there have any solution to delete them automatically after upload successfully?