#!/bin/bash
# Filename:      ${GRML_FAI_CONFIG}/config/scripts/GRMLBASE/45-efi
# Purpose:       create grub image for use in ISO for EFI boot
# Authors:       grml-team (grml.org), (c) Michael Prokop <mika@grml.org>
# Bug-Reports:   see http://grml.org/bugs/
# License:       This file is licensed under the GPL v2 or any later version.
################################################################################

set -e

if ! ifclass AMD64 ; then
  echo "Not in AMD64 class but EFI feature is restricted to amd64 only, skipping."
  exit 0
fi

set -u

if ! [ -r "${target}"/usr/lib/grub/x86_64-efi/moddep.lst ] ; then
  echo "/usr/lib/grub/x86_64-efi/moddep.lst could not be found, skipping."
  echo "NOTE: grub-efi-amd64-bin not installed?"
  exit 0
fi

GRUB_EFI_IMAGE="${target}/tmp/grub_efi_image"
TMP_CONFIG="${target}/tmp/grub_config_efi"
EFI_IMAGE="${target}/tmp/efi_image"

rm -f "$GRUB_EFI_IMAGE" "$TMP_CONFIG" "$EFI_IMAGE"

cat > "$TMP_CONFIG" <<EOF
search --set -f /conf/bootid.txt root
if [ -e /boot/grub/grub.cfg ]; then
 set prefix=\$root/boot/grub
 load_video
 configfile /boot/grub/grub.cfg
else
 echo "E: Could not find root device!"
fi
EOF

GRUB_EFI_IMAGE="${GRUB_EFI_IMAGE##${target}}"
TMP_CONFIG="${TMP_CONFIG##${target}}"
EFI_IMAGE="${EFI_IMAGE##${target}}"

$ROOTCMD grub-mkimage -O x86_64-efi -o "$GRUB_EFI_IMAGE" --prefix=/boot/grub/ --config="$TMP_CONFIG" \
  bitmap boot btrfs cat chain cmp configfile cpio echo efi_gop      \
  efi_uga elf ext2 fat gfxmenu gfxterm gzio help iso9660 jpeg linux \
  loopback lvm minicmd multiboot normal part_gpt part_msdos png     \
  probe raid reiserfs search search_fs_file search_fs_uuid          \
  search_label terminal test video videoinfo xfs

if ! [ -r "${target}/${GRUB_EFI_IMAGE}" ] ; then
  echo "Can not access grub efi image." >&2
  exit 1
fi

SIZE=$(du -sk "${target}/${GRUB_EFI_IMAGE}" | awk -F" " '{print $1'})
SIZE=$(((($SIZE / 32 )+2)*32))

dd if=/dev/zero of="${target}/${EFI_IMAGE}" bs=1k count="$SIZE" 2>/dev/null
$ROOTCMD mkfs.vfat -n GRML "$EFI_IMAGE" >/dev/null
$ROOTCMD mmd -i "$EFI_IMAGE" ::EFI
$ROOTCMD mmd -i "$EFI_IMAGE" ::EFI/BOOT
$ROOTCMD mcopy -i "$EFI_IMAGE" "$GRUB_EFI_IMAGE" ::EFI/BOOT/bootx64.efi >/dev/null

rm -f "${target}/${TMP_CONFIG}"
mv "${target}/${EFI_IMAGE}" "${target}/var/lib/grml_live_efi.img"
mv "${target}/${GRUB_EFI_IMAGE}" "${target}/var/lib/grml_live_bootx64.efi"

echo "Generated EFI image ${target}/var/lib/grml_live_efi.img"
echo "Generated bootx64 image ${target}/var/lib/grml_live_bootx64.efi"

## END OF FILE #################################################################
# vim:ft=sh expandtab ai tw=80 tabstop=4 shiftwidth=2