#!/bin/bash

set -e

function usage() {
    echo -n \
        "Usage: $(basename "$0") path_to_original_rom
Extract Intel firmware from the original ROM.
"
}

if [[ "${BASH_SOURCE[0]}" == "$0" ]]; then
    if [[ "${1:-}" == "--help" ]]; then
        usage
    else
        if [[ -n "$1" ]]; then
            BLOB_DIR="$(cd "$(dirname "$0")" && pwd)"
            COREBOOT_DIR="$(find "${BLOB_DIR}/../../build/x86/" -maxdepth 1 -type d -name 'coreboot-*')"

            pushd "${COREBOOT_DIR}"
            cd util/me_cleaner

            # Neutralize and shrink Intel ME.
            # https://github.com/corna/me_cleaner/wiki/External-flashing#neutralize-and-shrink-intel-me-useful-only-for-coreboot
            python me_cleaner.py -S -r -t -d -O out.bin -D ifd_shrinked.bin -M me_shrinked.bin "$1"

            mv ifd_shrinked.bin "${BLOB_DIR}/ifd.bin"
            mv me_shrinked.bin "${BLOB_DIR}/me.bin"
            rm ./*.bin

            cd ../ifdtool
            make

            # Extract the Intel Gigabit Ethernet (GbE) firmware from the
            # original ROM.
            ./ifdtool -x "$1"

            mv flashregion_3_gbe.bin "${BLOB_DIR}/gbe.bin"
            rm ./*.bin

            popd

        else
            echo "ERROR: You must supply a path to the original ROM."
            exit 1
        fi
    fi
fi