Run GNOME 40 / GNOME latest using JHBuild on Debian / Ubuntu

#!/bin/sh
# 
# All credit to fmuellner!
# https://gitlab.gnome.org/fmuellner/silverblue-stuff/-/blob/master/sb-session-setup.sh
set -x

jhbuild() {
  /home/inttf/.local/bin/jhbuild "$@"
}

export $(jhbuild run env | grep JHBUILD_PREFIX= | sed 's:\r::')

USER_UNIT_DIR=$XDG_RUNTIME_DIR/systemd/user.control

if [ ! -e $USER_UNIT_DIR ]
then
  # Pick up systemd units defined in jhbuild
  ln -s $JHBUILD_PREFIX/lib/systemd/user $USER_UNIT_DIR
  systemctl --user daemon-reload
fi

DBUS_SERVICE_DIR=$XDG_RUNTIME_DIR/dbus-1
rm -rf $DBUS_SERVICE_DIR

if [ ! -e $DBUS_SERVICE_DIR ]
then
  ln -s $JHBUILD_PREFIX/share/dbus-1 $DBUS_SERVICE_DIR
fi

# $PATH and a few other things are likely overriden by your distro on your
# ~/.profile file (see /etc/skel/.profile) -- this might cause .desktop files
# to be seen as "broken" (because TryExec/Exec can't confirm there's a valid
# binary to use)
jhbuild run gnome-session

rm $DBUS_SERVICE_DIR
rm $USER_UNIT_DIR
systemctl --user daemon-reload

chmod +x /usr/local/bin/gnome-session-jhbuild

cat  /usr/share/wayland-sessions/jhbuild.desktop
[Desktop Entry]
Name=jhbuild GNOME Wayland
Comment=This session logs you into a development GNOME
Exec=/usr/local/bin/gnome-session-jhbuild
TryExec=/usr/local/bin/gnome-session-jhbuild
Type=Application
DesktopNames=GNOME
X-GDM-SessionRegisters=true
EOF

cat  /usr/share/xsessions/jhbuild.desktop
[Desktop Entry]
Name=jhbuild GNOME Xorg
Comment=This session logs you into a development GNOME
Exec=/usr/local/bin/gnome-session-jhbuild
TryExec=/usr/local/bin/gnome-session-jhbuild
Type=Application
DesktopNames=GNOME
X-GDM-SessionRegisters=true
EOF

# add jhbuild to PATH
if [ -n "$UNDER_JHBUILD" ]; then
    PATH="$JHBUILD_PREFIX/bin:$PATH"
fi