Following ebuild use an USE for bashcompletion installation. But small files should always be installed. dev-lang/R dev-util/source-highlight media-sound/ncmpcpp net-analyzer/linkchecker sys-cluster/drbd sys-fs/zfs
(In reply to Justin Lecher from comment #0) > net-analyzer/linkchecker Has extra dependencies need for bashcompletion.
One bug per package, please.
In terms of policy, this is covered by https://projects.gentoo.org/qa/policy-guide/installed-files.html#pg0301. I'm working on a set of changes now to remove the few remaining packages for *-completion.
Merged: https://github.com/gentoo/gentoo/pull/21696