gcruft seems to have died off (https://www.google.com/search?q=gcruft
only returns ebuild results). I was using it quite a lot and wrote many
exception files. It's gone now with no way for my or anyone else's
ebuild to get the original source. I did preserve it though, here:
https://gitlab.com/Tatsh/gcruft

I wrote a replacement in C named gcrud. It only needs GLib2 installed to
work. It's much faster than gcruft ever was. The code is here:

https://gitlab.com/Tatsh/gcrud
https://github.com/Tatsh/gcrud

I am placing preference in GitLab for issues and merge requests, but I
will accept PRs from GitHub.

The whitelist https://gitlab.com/Tatsh/gcrud/blob/master/whitelist.c is
currently hard-coded and limited but the results are satisfactory for
now in my use cases.

Type use case:

sudo ./gcrud | sort -u > out.log

Examine out.log for things you can delete. There are absolutely zero
calls to delete files from the machine in my code and never will be any
kind of automation support.

If anyone tries it out I certainly would like to see your output and get
some bug reports or suggestions. The main feature planned is reading
from a configuration file for exact file paths and regexs.

--
Andrew