#! /bin/sh

set -eu

case ${PASS:-} in
    minimal.standard.live)
        ;;
    *)
        exit 0
        ;;
esac

cat <<EOF > /etc/initramfs-tools/conf.d/casperize.conf
export CASPER_GENERATE_UUID=1
EOF

cat <<EOF > /etc/initramfs-tools/conf.d/default-layer.conf
LAYERFS_PATH=${PASS}.squashfs
EOF

# change settings to have an 'installer only' session by default
printf "[org.gnome.desktop.a11y]\nalways-show-universal-access-status=true\n" \
	>> /usr/share/glib-2.0/schemas/casper.gschema.override
# we can't unload the dock because the shell would enter the overview on login;
# https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1788
printf "[org.gnome.shell.extensions.dash-to-dock:ubuntu]\ndock-fixed=false\nintellihide=false\n" \
	>> /root/usr/share/glib-2.0/schemas/casper.gschema.override
printf "[org.gnome.shell]\ndisabled-extensions=['ding@rastersoft.com']\n" \
	>> /root/usr/share/glib-2.0/schemas/casper.gschema.override

glib-compile-schemas /usr/share/glib-2.0/schemas/
# start the installer on session start, restore normal session on close

cat > /usr/lib/systemd/user/ubuntu-desktop-installer.service << EOF

[Unit]
Description=Ubuntu Desktop Installer
PartOf=graphical-session.target
After=graphical-session.target

# Never run in GDM
Conflicts=gnome-session@gnome-login.target

[Service]
Type=oneshot
ExecStart=/snap/bin/ubuntu-desktop-installer --try-or-install
ExecStopPost=sh -c "gsettings set org.gnome.shell.extensions.dash-to-dock dock-fixed true; gsettings set org.gnome.shell.extensions.dash-to-dock intellihide true; gnome-extensions enable ding@rastersoft.com"
Restart=no
EOF

mkdir /etc/systemd/user/graphical-session.target.wants/
ln -s /usr/lib/systemd/user/ubuntu-desktop-installer.service \
	/etc/systemd/user/graphical-session.target.wants/