#!/bin/sh

Q_ARCH='x86_64'
Q_NAME='qemu'
Q_SSH_PORT='2222'

USAGE="usage: `basename $0` [options] [--] [qemu options...]
Options:
    -A ARCH     VM architecture
    -p PORT     The port on localhost to map to the VM's sshd. [2222]
    -d FILE     Set disk
    -n NAME     Set name
    -h          This ;-)

A simple wrapper around qemu for running balenaOS images.
See the qemu(1) man page for more details.
"

Q_ARGS=""

while getopts ":hvd:A:n:" o; do
    case "$o" in
        A)
            Q_ARCH="$OPTARG"
            die "Found \"-$o $Q_ARCH\", not supported yet!" ;;
        d)
            Q_DISK="$OPTARG"
            Q_ARGS="${Q_ARGS} -drive file="${Q_DISK}",media=disk,cache=none,format=raw" ;;
        p)
            Q_SSH_PORT="$OPTARG" ;;
        n)
            Q_NAME="$OPTARG" ;;
        v)
            set -x ;;
        h|*)
            echo "$USAGE"
            exit ;;
    esac
done
shift $(($OPTIND-1))

case "${Q_ARCH}" in
    x86_64|amd64)
        qemu-system-x86_64 \
            -name "$Q_NAME" \
            -object rng-random,filename=/dev/urandom,id=rng0 -device virtio-rng-pci,rng=rng0 \
            -net nic,model=virtio -net user \
            -nic user,hostfwd=tcp::${Q_SSH_PORT}-:22222 \
            -machine type=pc,accel=kvm -smp 4 -cpu host \
            ${Q_ARGS} \
            "$@"
        ;;
    *) die "Unsupported arch" ;;
esac

exit $?