change greetd package to UsrEtc config

[denisok]

Change config location to /usr/etc for greetd in openSUSE.

https://todo.sr.ht/~kennylevinsen/greetd/20

actually we can pass --config as the parameter in service file:
https://git.sr.ht/~kennylevinsen/greetd/tree/master/item/greetd.service#L9

to support /usr/etc config instead of /etc/: https://build.opensuse.org/package/show/X11:Wayland/greetd

[denisok]

@danyspin97 maybe you could help with this one ?

[danyspin97]

Sure! :) The thing with passing --config /usr/etc/greetd/greetd.conf is that a user has no way to override that without modifying system files and this is definitely not what we want. I think we should document this in the tracker as well, as an argument against --config and a reason for upstream to accept our patch.

[krishjainx]

@denisok This seems like a non-issue or an easily fixable/documentable quirk/issue. How should we proceed?

[denisok]

It is nice to have for the MicroOS and similar OSes where /etc is reserved to the base OS. It would be cool to have all openSUSEway config files under /usr/etc instead.

Just good improvement, but not a critical one.

[LakshayPuhal]

I would like to work on this issue.

[FilippoBonazziSUSE]

I think greetd and associated greeters (gtkgreet, ...) would need to be patched to look for files under /etc/greetd first (current behaviour), then under /usr/etc/greetd (see https://en.opensuse.org/openSUSE:Packaging_UsrEtc).

greetd would need to be patched when looking for /etc/greetd/config.toml, gtkgreet would need to be patched when looking for /etc/greetd/environments. Perhaps there are others.

This could be done in OBS right away, and proposed to upstream in parallel.

Then we could provide our files under /usr/etc as %config (without noreplace) without fear of messing with the user-managed files under /etc.