usage: daily.py [-h] [--random] [-p] [-d ROOT_DIR] [--viewer VIEWER]
                [--setter {feh,nitrogen,hsetroot}]

optional arguments:
  -h, --help            show this help message and exit
  --random              choose a random image from root_dir
  -p, --preview         only preview image, don't set/save
  -d ROOT_DIR, --root-dir ROOT_DIR
                        path to root directory
  --viewer VIEWER       specify preview tool
  --setter {feh,nitrogen,hsetroot}
                        specify tool to use when setting wallpaper