#!/bin/sh

set -e

# NOTE: This package name detection will only work on Debian.
# If this postinst script ever starts doing work on Red Hat,
# we'll need to adapt this code accordingly.
script="$(basename "$0")"
pkg="${script%.postinst}"
systemd_unit="${pkg}.service"

case "${1}" in
    configure)
        if [ -e /run/systemd/system ]; then
            eval "$(systemctl -p UnitFileState show "$systemd_unit")"
            case "$UnitFileState" in
                disabled)
                    # Failing to enable or start the service is not a
                    # package error, so don't let errors here
                    # propagate up.
                    systemctl enable "$systemd_unit" || true
                    systemctl start "$systemd_unit" || true
                    ;;
                enabled)
                    systemctl daemon-reload || true
                    systemctl reload-or-try-restart "$systemd_unit" || true
                    ;;
            esac
        fi
        ;;
esac