Upstream Global Themes with SDDM theme dependencies issue

[dominichayesferen]

Issue Description

https://bugs.kde.org/show_bug.cgi?id=454509
https://bugs.kde.org/show_bug.cgi?id=463161

This will likely affect Vanilla OS, too, since /usr is an immutable directory iirc.

Steps to Reproduce

• Install a Global Theme with an SDDM dependency, such as Qogir

On what version of Vanilla OS this happens?

Unreleased

Additional Information

Feren OS recently added its own workaround for this, employing a fake sddmtheme.knsrc to trick Kool New Stuff into thinking the SDDM themes are installing (but instead they're just being deleted) - this however has the caveat of the section still appearing in Discover, and being semi-redundant when SDDM Configurator is installed too, plus it's not very vanilla by design.

In case you want to mess around with it, here's a .deb file containing the workaround: https://gitlab.com/feren-os/feren-repositories-jammy/-/raw/master/pool/main/f/feren-plasma-workaround-gtsddm/feren-plasma-workaround-gtsddm_2024.01.0.0.0+ubrel3_all.deb?ref_type=heads

Without the file nor SDDM Config, Global Themes with SDDM dependencies will instantly fail to install, so that isn't a solution, either.

The best solution would be for this to finally be fixed upstream (blacklist dependency types, much?), but alas until such times...

[ViktorJannicke]

This will be one of the trickiest things to properly fix. The only solution I have come up with so far is to run the install commands in a transactional shell session that can modify the root partition while I was thinking about how to fix this on OpenSUSE MicroOS.

But that would require to either patch the settings module or to run the whole settings module in some kind of a container or transactional shell.

EDIT: while thinking about it some more, running the settings module in a podman/distrobox/apx container and using Symlinks(to link the sddm folder to a writable location) + Volumes(to map the sddm folder into the correct location in the container) could probably fix it without touching the plasma packages and without modifying root.

[Maxwelldoug]

Putting in my two cents here, this can be much easier fixed by just moving the SDDM Theme directory into /etc - I will do so in a later pull request if it has not been done by the point that my current more pressing issues are resolved.

[Maxwelldoug]

This will be fixed in my next PR

[Maxwelldoug]

This is fixed by #27