#!/hint/bash -euE
# Copyright (C) 2023  Umorpha Systems
#
# Some of the config files created here are based on the ones from
# archiso.  It is the position of archiso that the config files are
# not sufficiently creative to qualify for copyright.
#
# SPDX-License-Identifier: AGPL-3.0-or-later

post_install+=(20:ethernet:post_install)
ethernet:post_install() {
	local arg_mountpoint=$1

	# networkd (IP) ########################################################

	install -Dm644 /dev/stdin "$arg_mountpoint/etc/systemd/network/20-ethernet.network" <<-EOF
		[Match]
		# Matching with "Type=ether" causes issues with containers because it also matches virtual Ethernet interfaces (veth*).
		# See https://bugs.archlinux.org/task/70892
		# Instead match by globbing the network interface name.
		Name=en*
		Name=eth*

		[Network]
		DHCP=yes
		MulticastDNS=yes

		# systemd-networkd does not set per-interface-type default route metrics
		# https://github.com/systemd/systemd/issues/17698
		# Explicitly set route metric, so that Ethernet is preferred over Wi-Fi and Wi-Fi is preferred over mobile broadband.
		# Use values from NetworkManager. From nm_device_get_route_metric_default in
		# https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/blob/main/src/core/devices/nm-device.c
		[DHCPv4]
		RouteMetric=100

		[IPv6AcceptRA]
		RouteMetric=100
	EOF

	install -Dm644 /dev/stdin "$arg_mountpoint/etc/systemd/network.conf.d/ipv6-privacy-extensions.conf" <<-EOF
		[Network]
		IPv6PrivacyExtensions=yes
	EOF

	install -Dm644 /dev/stdin "$arg_mountpoint/etc/systemd/system/systemd-networkd-wait-online.service.d/wait-for-only-one-interface.conf" <<-EOF
		# Allow systemd-networkd-wait-online to succeed with one interface, otherwise, if multiple network interfaces exist,
		# network-online.target gets needlessly delayed.
		# See https://wiki.archlinux.org/title/systemd-networkd#systemd-networkd-wait-online
		[Service]
		ExecStart=
		ExecStart=/usr/lib/systemd/systemd-networkd-wait-online --any
	EOF

	systemctl --root="$arg_mountpoint" enable systemd-networkd.service

	# resolved (DNS) #######################################################

	ln -sf /run/systemd/resolve/stub-resolv.conf "$arg_mountpoint/etc/resolv.conf"
	systemctl --root="$arg_mountpoint" enable systemd-resolved.service

	# timesyncd (NTP) ######################################################

	systemctl --root="$arg_mountpoint" enable systemd-timesyncd.service


}