# Shell snippet: copy an OpenCore ESP (makeOpenCore output) into the EFI System
# Partition of a macOS qcow2 so the image boots standalone with plain OVMF.
# libguestfs follows qcow2 backing chains and writes into the top overlay.
{ pkgs, lib, ... }:
{ esp, image }:
''
  echo "=== vmix: installing OpenCore into the ESP of ${image} ==="
  ESP_DEV=$(guestfish --ro -a ${image} run : list-filesystems | awk -F': ' '$2 == "vfat" {print $1; exit}')
  [ -n "$ESP_DEV" ] || { echo "vmix: no FAT EFI partition found in ${image}"; guestfish --ro -a ${image} run : list-filesystems; exit 1; }
  guestfish -a ${image} -m "$ESP_DEV" <<GFS
  rm-rf /EFI/OC
  rm-rf /EFI/BOOT
  rm-rf /EFI/vmix
  copy-in ${esp}/EFI /
  ls /EFI/OC
  GFS
''