setup-ntp.in

#!/bin/sh

PREFIX=

. "$PREFIX/lib/libalpine.sh"

usage() {
	cat <<-__EOF__
		usage: setup-ntp [-h] [-c choice of NTP daemon]

		Setup NTP time synchronization

		options:
		 -h  Show this help
		 -c  Choice of NTP daemon: busybox openntpd chrony none
	__EOF__
	exit 1
}

while getopts "hc:" opt; do
	case $opt in
		c) resp="$OPTARG";;
		h) usage;;
	esac
done

while ! isin "$resp" busybox openntpd chrony none abort; do
	ask "Which NTP client to run? ('busybox', 'openntpd', 'chrony' or 'none')" chrony
done

pkgs="$resp"

case "$resp" in
none|abort)
	exit 0
	;;
busybox)
	pkgs=''
	svc=ntpd
	;;
chrony)
	if apk info --installed --quiet acf-core; then
		pkgs="$pkgs acf-chrony"
	fi
	svc=chronyd
	;;
openntpd)
	svc=openntpd
	;;
esac

[ -z "$pkgs" ] || apk add --quiet $pkgs
rc-update add $svc default
rc-service $svc start