#!/bin/execlineb -S1
# SPDX-License-Identifier: EUPL-1.2+
# SPDX-FileCopyrightText: 2022 Alyssa Ross <hi@alyssa.is>

if -n {
  if -n { test $# -eq 1 -a $1 = switch }
  fdmove -c 1 2
  echo "Usage: ${0} switch"
}

cd /run/virtiofs/virtiofs0

backtick -E dir { mktemp -d }
foreground {
  if { nix-build -o ${dir}/system <spectrum-vms> }
  if { nix-env -p nix/var/nix/profiles/vms --set ${dir}/system }
  backtick -E vmsdir { resolve_in_root . nix/var/nix/profiles/vms }
  cd $vmsdir
  elglob -0 glob *
  forx -E vm { $glob }
  ln -s /nix/var/nix/profiles/vms/${vm} /run/virtiofs/virtiofs0/svc/data
}
importas -iu ? ?
background { rm -rf $dir }
exit $?