#!/bin/bash

PRJ_PATH=`pwd`

BOARD=imx6ull

#CROSS_TOOL=arm-linux-gnueabihf-
CROSS_TOOL=/opt/buildroot/cortexA7/bin/arm-linux-

# bootloader, linux kernel tarball path and branch 
TAR_PATH=${PRJ_PATH}/tarball
BSP_BRANCH="lf-5.10.52-2.1.0"

# rootfs should be buildroot or stretch/buster/bullseye for debian system
ROOTFS=buildroot

set -u
set -e

function do_modify_build()
{
    DIR=$1

    cd $PRJ_PATH

    sed -i "s|^BOARD.*|BOARD=${BOARD}|g" ${DIR}/build.sh 

    if [ $DIR = bootloader -o $DIR == kernel ] ; then 
        sed -i "s|^CROSS_TOOL.*|CROSS_TOOL=${CROSS_TOOL}|g" ${DIR}/build.sh 
        sed -i "s|^TAR_PATH.*|TAR_PATH=${TAR_PATH}|g" ${DIR}/build.sh 
        sed -i "s|^BSP_BRANCH.*|BSP_BRANCH=${BSP_BRANCH}|g" ${DIR}/build.sh
    elif [ $DIR = rootfs -o $DIR == images ] ; then 
        sed -i "s|^TAR_PATH.*|TAR_PATH=${TAR_PATH}|g" ${DIR}/build.sh 
        sed -i "s|^ROOTFS=.*|ROOTFS=${ROOTFS}|g" ${DIR}/build.sh 
    elif [ $DIR = tarball ] ; then
        sed -i "s|^ROOTFS=.*|ROOTFS=${ROOTFS}|g" ${DIR}/build.sh 
    fi
}

function do_modify()
{ 
    do_modify_build tarball
    do_modify_build bootloader 
    do_modify_build kernel 
    do_modify_build rootfs 
    do_modify_build images
}

function do_build()
{
    cd $PRJ_PATH/tarball && ./build.sh && cd -

    cd $PRJ_PATH/bootloader && ./build.sh && cd -

    cd $PRJ_PATH/kernel && ./build.sh && cd -

    cd $PRJ_PATH/rootfs && ./build.sh && cd -
}

do_modify

do_build