#!/usr/bin/env bash

set -xeuf -o pipefail

UNAME_R="$(</boot/.uname)"
BOOT_PART="$(grep '/ ' /etc/fstab | awk '{print $1}')"

cp /opt/opi5-efi/boot.cmd boot/efi/boot.cmd
cp /opt/opi5-efi/uEnv.txt boot/efi/uEnv.txt

if [ ! -f /boot/.uname ]; then
    echo "ERROR: No /boot/.uname found to extract 'uname -r' from."
    exit 1
fi

if [ ! -f "/boot/initramfs-${UNAME_R}.img" ]; then
    echo "Initramfs not found... regenerating."
    /sbin/installkernel "${UNAME_R}" "/boot/.vmlinuz-${UNAME_R}-rpm" "/boot/.System.map-${UNAME_R}-rpm"
    mv "/boot/vmlinuz-${UNAME_R}.old" "/boot/vmlinuz-${UNAME_R}"
fi

echo "rootdev=${BOOT_PART}" >> "/boot/efi/uEnv.txt"
sed -i "s/setenvrootdev/setenv rootdev \"${BOOT_PART}\"/" "/boot/efi/boot.cmd"

mkimage -A arm -T ramdisk -C none -n uInitrd -d "/boot/initramfs-${UNAME_R}.img" "/boot/uInitrd-${UNAME_R}"
mkimage -C none -A arm -T script -d /boot/efi/boot.cmd /boot/efi/boot.scr

pushd /boot
ln -s "uInitrd-${UNAME_R}" uInitrd
popd