Use upstream tmpfiles.d

[jtojnar]

Currently, NixOS modules define tmpfiles.d manually using systemd.tmpfiles.rules option. Many packages provide the configuration files, though, so it would make sense to reuse them.

The easiest method would be manually adding the files to /etc, e.g. environment.etc."tmpfiles.d/rkt.conf".source = "${pkgs.rkt}/lib/tmpfiles.d/rkt.conf";, but automating it the same way services are installed would probably make more sense in the long term. systemd.packages could recognize at least ${pkg}/etc/tmpfiles.d/*.conf and ${pkg}/lib/tmpfiles.d/*.conf files, see tmpfiles.d(5), and install them to /etc automatically.

[flokli]

I agree this should be done in systemd.packages - we recently (#65376) moved support for generators into systemd.packages too.

We might also want to add example/tmpfiles.d to the list of paths (#69295), or move the systemd tmpfiles to an appropriate location during install.

possible usages: #66856

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[flokli]

I think this has been implemented with #93073, hasn't it?

[Mic92]

yes.