fix: UEFI boot (#290)

#!/usr/bin/env bash

set -Eeuo pipefail

OVMF="/usr/share/OVMF"

# Docker environment variables

: ${BOOT_MODE:='legacy'}  # Display type

: ${BOOT_MODE:='legacy'}  # Boot mode

case "${BOOT_MODE,,}" in

  uefi)

    BOOT_OPTS="-bios /usr/share/OVMF/OVMF_CODE_4M.fd"

    VARS="$OVMF/OVMF_VARS_4M.fd"

    [ ! -f "$VARS" ] && error "UEFI vars file ($VARS) not found!" && exit 44

    [ ! -f "$STORAGE/uefi.vars" ] && cp "$VARS" "$STORAGE/uefi.vars"

    BOOT_OPTS="-bios $OVMF/OVMF_CODE_4M.fd"

    BOOT_OPTS="$BOOT_OPTS -drive file=$STORAGE/uefi.vars,if=pflash,format=raw"

    ;;

  secure)

    BOOT_OPTS="-bios /usr/share/OVMF/OVMF_CODE_4M.secboot.fd"

    VARS="$OVMF/OVMF_VARS_4M.secboot.fd"

    [ ! -f "$VARS" ] && error "UEFI vars file ($VARS) not found!" && exit 44

    [ ! -f "$STORAGE/uefi.vars" ] && cp "$VARS" "$STORAGE/uefi.vars"

    BOOT_OPTS="-bios $OVMF/OVMF_CODE_4M.secboot.fd"

    BOOT_OPTS="$BOOT_OPTS -drive file=$STORAGE/uefi.vars,if=pflash,format=raw"

    ;;

  legacy)

    BOOT_OPTS=""