# Put the classroom's settings into the session's configuration cascade.
#
# This is the file the migration failure turned on. Everything the room is
# — the panel layout, the lock screen that must never appear, the idle
# behaviour, the Kiosk restrictions — lives in /etc/ekklesia-classroom/xdg
# and reaches Plasma only if that directory is in XDG_CONFIG_DIRS. It was
# set in /etc/environment.d, which systemd's user manager reads. Measured
# on a real machine and then reproduced in the lab: that is not enough.
#
# startplasma sources /etc/xdg/plasma-workspace/env/*.sh at session start,
# and Debian's env.sh there sets XDG_CONFIG_DIRS from scratch when the
# variable is empty — which it is, because SDDM starts the session through
# PAM, and PAM does not read /etc/environment.d. startplasma then pushes
# its own environment into the user manager, so the value from
# /etc/environment.d was not merely bypassed, it was overwritten for every
# user service as well. The room came up as stock Debian Plasma: kickoff,
# a pager, a system tray, the Debian wallpaper, and a lock screen.
#
# So the classroom sets it where Plasma itself looks. The name sorts after
# env.sh, so this appends to Debian's value rather than replacing it, and
# the whole thing is a no-op if the directory is already there.
#
# The /etc/environment.d file stays: it covers user services that start
# before, or without, a Plasma session.

case ":${XDG_CONFIG_DIRS:-}:" in
    *:/etc/ekklesia-classroom/xdg:*)
        ;;
    *)
        XDG_CONFIG_DIRS="/etc/ekklesia-classroom/xdg:${XDG_CONFIG_DIRS:-/etc/xdg}"
        export XDG_CONFIG_DIRS
        ;;
esac