[HarfBuzz] tool for 'get all alternates'?

[Rolf Langenhuijzen]

Does anyone know of some command line tool that shows some useful info similar to Adobe's CS Glyph window where you can "show alternates for selection."

Using the otfinfo tool I know things like how many stylistic sets there are in font, but sometimes there aren't any (or only a few) but there are many alternates inside the font. If I could somehow read an entire font to "index" the alternates per character that would be very handy.

If you have any ideas I'd like to hear em ;)

Best,
Rolf