I am the author of "what" and am very happy to hear people like this tool I made. :)
"what" was my first real attempt at rust, and I love the project very much.
That said, it is a hobby project - and so I will likely be a few days responding to all issues and contributions that came from this thread.
"what" has already received some great contributions that are major parts of the code base. I would be very happy for more (in the form of features, bug fixes, issues and packaging).
A note to those having issues installing: as mentioned in this thread, packaging for all the various linux distributions and mac is a great effort. I apologize that at the moment the installation is a little bumpy (especially for those not very familiar with rust).
A good first step for if "cargo install what" isn't working is to try to `rustup update` so you get the latest version of rust and cargo.
Other than that, I hope to support your setup in the future, and/or hear from you in the issues of the repo. Debug help for OSes I do not have access to would be greatly appreciated. :)
Thank you all!