#!/bin/sh
bit64=false
redownload=false
fsck=false
daemon=false
while getopts "6rfd" opt; do
  case "$opt" in
    6) bit64=true;;
    r) redownload=true;;
    f) fsck=true;;
    d) daemon=true;;
    *) echo "Usage: ${0} [options]"
       echo 'Options include:'
       echo ' -6 = use the new 64bit build'
       echo ' -r = redownload instead of booting existing image'
       echo ' -f = run a filesystem check (requires losetup and fsck.ext2)'
       echo ' -d = daemonize, start qemu and return to the shell'
# TODO: option for curses display (for non-GUI environments and/or to translate keyboard because Hurd console currently lacks keyboard layouts outside US qwerty)
       exit;;
  esac
done
if [ ! -e debian-hurd.img ] || "$redownload"; then
  rm -f debian-hurd.img.tar.gz
  if "$bit64"; then
    wget 'https://cdimage.debian.org/cdimage/ports/latest/hurd-amd64/debian-hurd.img.tar.gz'
  else
    wget 'https://cdimage.debian.org/cdimage/ports/latest/hurd-i386/debian-hurd.img.tar.gz'
  fi
  image="`tar -xvzf debian-hurd.img.tar.gz`"
  mv "$image" debian-hurd.img
fi
if "$fsck"; then
# TODO: Dynamically figure out which way (if any, maybe user is root) to run these as root
  disk="`sudo losetup -fP --show debian-hurd.img`"
  if [ -z "$disk" ]; then echo 'Failed to losetup the disk image. Is losetup installed?'; exit 1; fi
  sudo fsck.ext2 "${disk}p5"
  sudo losetup -d "$disk"
fi
kvm="`grep -q ' \(svm\|vmx\)' /proc/cpuinfo && echo '--enable-kvm'`"
runqemu()
{
  # I think 32bit code should work even if we run x86_64 qemu?
  # For now 64bit Hurd seems to require -M q35 to run in qemu
  qemu-system-x86_64 ${kvm} -m 2G -M q35 -drive cache=writeback,file=debian-hurd.img -net user,hostfwd=tcp:127.0.0.1:2222-:22 -net nic,model=e1000
}
if "$daemon"; then
  runqemu > /dev/null 2> /dev/null &
else
  runqemu
fi