As gnome-shell is a required component for GNOME sessions, gnome-session
will currently always try to autostart it. However as we are moving towards
using systemd's user instance for session startup, gnome-session should only
be responsible for launching the shell when either not running under systemd
or when we were built without systemd support.
gnome-session can detect the former but not the latter, so communicate this
via the newly added X-GNOME-HiddenUnderSystemd key in the .desktop file.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/507https://gitlab.gnome.org/GNOME/gnome-session/merge_requests/13
intltool is unmaintained nowadays while upstream gettext gained
support for formats like GSettings schemas and .desktop files,
and offers a mechanism to teach it about other XML formats not
yet supported out of the box which we can use for the rest.
So there's nothing stopping us, just make the switch ...
https://bugzilla.gnome.org/show_bug.cgi?id=769074
We can autodetect what to do based on the user's session, so drop
the separate desktop files.
This, along with some future changes, will enable us to be bus
activatable.
https://bugzilla.gnome.org/show_bug.cgi?id=741666
