/lib/udev/rules.d/90-bolt.rules is in bolt 0.2-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | # bolt udev rules
#
# SPDX-License-Identifier: GPL-2.1+
#
# Copyright © 2017 Red Hat, Inc
#
# Authors:
# Christian J. Kellner <ckellner@edhat.com>
#
ACTION=="remove", GOTO="bolt_end"
# start bolt service if we have a thunderbolt device connected
SUBSYSTEM=="thunderbolt", TAG+="systemd", ENV{SYSTEMD_WANTS}+="bolt.service"
LABEL="bolt_end"
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