#!/bin/bash

. ./scripts/colors.sh
. ./scripts/funcs.sh
. ./scripts/config.sh

#--------------- Building Linux Kernel ---------------------
kernel() {
    printf "$UGREEN** Building Linux Kernel\n$RESET"
    rm -r $build/kernel # &>> $fulllogfile
    mkdir -p $build/kernel # &>> $fulllogfile
    cd $build/kernel
    printf "$UGREEN** Extracting Linux Kernel\n$RESET"
    tar -xf $root/downloads/linux-$KERNEL_VERSION.tar.xz  # &>> $fulllogfile
    check $? "Extract Linux Kernel"
    cd linux-$KERNEL_VERSION
    printf "$UGREEN** Configuring Linux Kernel\n$RESET"
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- mrproper  # &>> $fulllogfile
    cp $root/board/${BOARD_NAME}/linux-$KERNEL_VERSION.config .config # &>> $fulllogfile
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- oldconfig # &>> $fulllogfile
    check $? "Configure Linux Kernel"
    printf "$UGREEN** Building Linux Kernel\n$RESET"
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- $makeflags  # &>> $fulllogfile
    check $? "Build Linux Kernel"
    KIMAGE=zImage
    [ "$ARCH" = "arm64" ] && KIMAGE=Image
    ls -lh arch/$ARCH/boot/$KIMAGE
} # kernel
#-----------------------------------------------------------

#----------- Build and Install kernel modules --------------
kernel_modules() {
    printf "$UGREEN** Building Linux Kernel modules\n$RESET"
    cd $build/kernel/linux-$KERNEL_VERSION
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- modules # &>> fulllogfile
    check $? "Build Linux Kernel modules"
    printf "$UGREEN** Installing Linux Kernel modules into rootfs path\n$RESET"
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- INSTALL_MOD_PATH=$rootfspath modules_install # &>> $fulllogfile
    for i in $(find $rootfspath | grep .ko); do
        gzip -9 $i;
    done
    check $? "Install Linux Kernel modules"
    rm -v $rootfspath/usr/lib/modules/$KERNEL_VERSION/{source,build}
} # kernel_modules
#-----------------------------------------------------------

#--------------- Building Linux Kernel with rootfs ---------
kernel_with_rootfs() {
    printf "$UGREEN** Building Linux Kernel with rootfs\n$RESET"
    if [ ! -d $out ]; then
        mkdir -pv $out
    fi
    cd $build/kernel/linux-$KERNEL_VERSION
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- CONFIG_INITRAMFS_SOURCE=$rootfspath $makeflags # &>> fulllogfile
    check $? "Build Linux Kernel with rootfs"
    printf "$UGREEN** Installing Linux Kernel into images path\n$RESET"
    # make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE INSTALL_MOD_PATH=$rootfspath modules_install # &>> $fulllogfile
    # rm -v $rootfspath/usr/lib/modules/6.1.91/{source,build}
    KIMAGE=zImage
    [ "$ARCH" = "arm64" ] && KIMAGE=Image
    cp -v arch/$ARCH/boot/$KIMAGE $sdroot/boot
    check $? "Install Linux Kernel into images path"
}
#-----------------------------------------------------------

kernel_headers() {
    printf "$UGREEN** Building Linux Kernel headers\n$RESET"
    [ ! -d $build/kernel-headers ] && mkdir $build/kernel-headers
    cd $build/kernel-headers
    tar -xf $root/downloads/linux-$KERNEL_VERSION.tar.xz
    check $? "Extract Linux Kernel"
    cd linux-$KERNEL_VERSION
    make ARCH=$ARCH headers
    check $? "Build kernel headers"
}