#!/bin/sh
set -eu

API_SOCKET="/hy.socks"

# Build the --net argument, omitting empty fields so cloud-hypervisor can pick
# sensible defaults (auto-created tap / generated MAC) instead of getting
# "tap=,mac=".
NET_INTERFACE="${NET_INTERFACE:-}"
NET_MAC="${NET_MAC:-}"
NET_ARG="tap=${NET_INTERFACE}"
if [ -n "$NET_MAC" ]; then
  NET_ARG="${NET_ARG},mac=${NET_MAC}"
fi

/usr/bin/cloud-hypervisor \
  --kernel /boot/vmlinuz-virt --initramfs /boot/initramfs-virt \
  --disk path=/image/vm.raw,image_type=raw \
  --disk path=/image/data.raw,direct=on,image_type=raw \
  --api-socket "$API_SOCKET" \
  --cmdline "root=/dev/vda rootfstype=ext4 modules=ext4a rw console=hvc0" \
  --cpus boot=${CPU_COUNT:-4} \
  --memory size=${MEMORY:-4G},shared=on \
  --net "$NET_ARG" \
  "$@" &

CH_PID=$!

_stop() {
  echo "STOPPING!!"
  ch-remote --api-socket "$API_SOCKET" power-button
  wait $CH_PID
}

trap _stop TERM INT

wait $CH_PID