#!/bin/bash

set -o errexit -o nounset -o pipefail -o xtrace

declare -r MOUNTDIR="$(mktemp -d)"

cleanstep1() {
    rm -r "${MOUNTDIR}"
}
trap cleanstep1 EXIT

mount -t ext4 -o noexec,nosuid,nodev,rootcontext=system_u:object_r:container_file_t:s0 LABEL=fcos_images "${MOUNTDIR}"

cleanstep2() {
    umount -f "${MOUNTDIR}"
    cleanstep1
}
trap cleanstep2 EXIT

declare -r KERNEL_FILE="$(basename "$(ls -1 "${MOUNTDIR}"/fedora-coreos-*-live-kernel-x86_64)")"
declare -r INITRAMFS_FILE="$(basename "$(ls -1 "${MOUNTDIR}"/fedora-coreos-*-live-initramfs.x86_64.img)")"
declare -r ROOTFS_FILE="$(basename "$(ls -1 "${MOUNTDIR}"/fedora-coreos-*-live-rootfs.x86_64.img)")"

echo "dhcp-option=encap:129,1,\"${KERNEL_FILE}\"" > /root/dhcp/dhcp-options
echo "dhcp-option=encap:129,2,\"${INITRAMFS_FILE}\"" >> /root/dhcp/dhcp-options
echo "dhcp-option=encap:129,3,\"${ROOTFS_FILE}\"" >> /root/dhcp/dhcp-options