On Thu, 20 Sep 2018 at 22:23:37 +0100, Andrew Hayzen wrote: > tl;dr; Should xdg-desktop-portal-kde provide xdg-deskop-portal-backend?
Presumably. If it's a valid implementation of the same interfaces as xdg-desktop-portal-gtk (installs /usr/share/xdg-desktop-portal/portals/*.portal listing various interfaces of the form org.freedesktop.impl.portal.Foo) then it should implement the virtual package. I was about to report a bug, but https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=890910 already exists. > From my understanding of xdg-desktop-portal, one only needs a single > backend installed - either the -gtk or -kde - depending which desktop > environment they want the portals to feel integrated into. Almost, although it isn't quite that simple. There are several interfaces that can be provided (FileChooser, Print, Screenshot and so on). For each one, xdg-desktop-portal tries to find the most appropriate backend: - the first backend in alphabetical order where UseIn matches XDG_CURRENT_DESKTOP (e.g. -gtk has UseIn=gnome) that provides the interface; - or if there is no matching backend, the first backend in alphabetical order that provides the interface So on KDE (assuming you have UseIn=kde, or plasma, or whatever KDE uses for XDG_CURRENT_DESKTOP) you'll generally get the -kde backend - unless there are (new?) interfaces that are only implemented in the -gtk backend, in which case you'll get the -gtk implementation of those interfaces (if -gtk is also installed) and the -kde implementation of the rest. -gtk is the default implementation of the virtual package, because it's basically the reference implementation (it's maintained by the same people as flatpak and the desktop-agnostic x-d-p frontend) and it should fit reasonably well into multiple desktop environments (GNOME, XFCE, LXDE and the various GNOME forks like MATE and Cinnamon). It should be harmless to have both -gtk and -kde installed, other than wasting an insignificant amount of disk space. I'd suggest giving KDE/Plasma desktop metapackages a Recommends on xdg-desktop-portal-kde to make sure most KDE users have that one available. > Would this then allow the user to > install flatpak with xdg-desktop-portal-kde and without installing -gtk > ? That's already possible - it's only a Recommends. However, having -kde provide the virtual package would make that configuration easier to achieve. smcv
