Hey, Admittedly shameless plug and only a minor thing, but since I've seen mgorny's great addition to file(1) mentioned on the list, I've also wanted to share that sometime in early 2020 I've got a PR merged into RipGrep which adds a filter for searching ebuild files only. E.g. you can do:
rg -t ebuild <your_search_pattern> Maybe some maintainers will find it useful when searching for examples in ebuilds. Cheers, Zoltan