#!/bin/execlineb -S1
# SPDX-License-Identifier: EUPL-1.2+
# SPDX-FileCopyrightText: 2024 Alyssa Ross <hi@alyssa.is>

backtick -E dir { mktemp -d /run/vm/by-id/XXXXXX }
backtick -E id { basename -- $dir }

if { mkdir -p /run/configs/${id}/fs }
if { redirfd -w 1 /run/configs/${id}/fs/type echo appimage }
if { touch /run/configs/${id}/fs/run }
if { mount --rbind $1 /run/configs/${id}/fs/run }
if {
  ln -s /usr/lib/spectrum/img/appvm/blk /usr/lib/spectrum/img/appvm/vmlinux
    /run/configs/${id}
}

if { ln -s /run/configs/${id} ${dir}/config }

if { create-vm-dependencies $id }

piperw 4 3
background {
  fdclose 3
  fdmove 0 4

  # Wait for the VMM to be up, then start the VM.
  if { redirfd -w 1 /dev/null head -1 }
  vm-start $id
}
fdclose 4

foreground { run-vmm $id }
fdclose 3

if {
  forx -pE service {
    dbus
    vhost-user-fs
    vhost-user-gpu
    xdg-desktop-portal-spectrum-host
  }
  s6-instance-delete /run/service/${service} $id
}

if {
  forx -E mount {
    /run/configs/${id}/fs/run
    ${dir}/fs/config
    ${dir}/fs/doc
  }
  umount $mount
}

rm -r $dir /run/configs/${id}