# post_install / post_upgrade for daedalus-v4l2.
#
# Enables (but doesn't start — leave that to the operator) the
# daemon service so it comes up on next boot.  Reloads systemd
# so the new unit file is visible.  Triggers modules-load so the
# kernel module loads without a reboot if daedalus-v4l2-dkms is
# also installed.

_activate() {
    systemctl daemon-reload >/dev/null 2>&1 || true
    systemctl enable daedalus-v4l2.service >/dev/null 2>&1 || true

    # Trigger /usr/lib/modules-load.d/daedalus-v4l2.conf without a
    # reboot.  Safe if the module is already loaded.
    systemd-modules-load >/dev/null 2>&1 || true

    cat >&2 <<EOF
==> daedalus-v4l2: service enabled, will start on next boot.
==> To start now (requires the kernel module to be loaded):
==>   sudo systemctl start daedalus-v4l2.service
==> Verify decode path:
==>   journalctl -u daedalus-v4l2.service -f
EOF
}

post_install() {
    _activate
}

post_upgrade() {
    _activate
    systemctl try-restart daedalus-v4l2.service >/dev/null 2>&1 || true
}

pre_remove() {
    systemctl stop daedalus-v4l2.service    >/dev/null 2>&1 || true
    systemctl disable daedalus-v4l2.service >/dev/null 2>&1 || true
}

post_remove() {
    systemctl daemon-reload >/dev/null 2>&1 || true
}