Windows: list rtools versions

[gaborcsardi]

Maybe the whole rtools stuff should be a separate command? Or keep it in rim add, and have rim list --rtools as well?

[edavidaja]

FWIW I went looking for it in rig system

[CGMossa]

There are now many rtools for many versions.. and I think it make sense to make a separate command for it or something.

[gaborcsardi]

Closed by 9d68610