#!/usr/bin/bash
#
# Start a netboot VM connected to macvtap device and fraction of mem/cpus
#
set -eu

mac="$(ip link | grep -A1 "vm-macvtap" | \
	  sed -nE "s%\s+link/ether ([[:xdigit:]:]{17}) .+%\1%p")"

if [[ $# -eq 0 ]] ; then
    mem=$(sed -En "s/^MemTotal:\s+([0-9]+)\s+kB/\1/p" /proc/meminfo)
    cpu=$(sed -En "0,/^cpu cores/s/^cpu cores\s+:\s+([0-9]+)/\1/p" /proc/cpuinfo)
    arg="--memory $((mem/2048)) --vcpu $((cpu/2))"
    echo "Set options: $arg"
fi

loader='/usr/share/OVMF/OVMF_CODE_4M.fd,\
loader.readonly=yes,loader.type=pflash,\
nvram.template=/usr/share/OVMF/OVMF_VARS_4M.fd'

type="ethernet,mac=${mac},target.dev=vm-macvtap,xpath1.set=./target/@managed=no"

XDG_CONFIG_HOME="/tmp/${UID}/.config" \
	       exec "virt-install \
               --name bookworm \
               --osinfo debiantesting \
               --nodisks --import \
               --pxe --boot loader=$loader \
               --network type=$type \
	       $* ${arg:-}"