#!/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 $opt in
                c) ntpchoice="$OPTARG";;
		h) usage;;
        esac
done

if [ -z "$ntpchoice" ]; then
        echo -n "Which NTP client to run? ('busybox', 'openntpd', 'chrony' or 'none') [chrony] "
        default_read ntpchoice "chrony"
fi

pkgs="$ntpchoice"

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