#!/bin/bash

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

#--------------- Building Linux Kernel ---------------------
kernel() {
    print_info "** Building Linux Kernel"
    [ -d $build/kernel ] && return 0
    mkdir -p $build/kernel
    cd $build/kernel
    print_info "** Extracting Linux Kernel"
    tar -xf $root/downloads/linux-$KERNEL_VERSION.tar.xz
    check $? "Extract Linux Kernel"
    cd linux-$KERNEL_VERSION
    print_info "** Configuring Linux Kernel"
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- mrproper
    cp $root/board/${BOARD_NAME}/linux-$KERNEL_VERSION.config .config
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- oldconfig
    check $? "Configure Linux Kernel"
    print_info "** Building Linux Kernel"
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- $makeflags
    check $? "Build Linux Kernel"
    KIMAGE=zImage
    [ "$ARCH" = "arm64" ] && KIMAGE=Image
    ls -lh arch/$ARCH/boot/$KIMAGE
} # kernel
#-----------------------------------------------------------

#----------- Build and Install kernel modules --------------
kernel_modules() {
    print_info "** Building Linux Kernel modules"
    [ -d $rootfspath/usr/lib/modules ] && return 0
    cd $build/kernel/linux-$KERNEL_VERSION
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- modules
    check $? "Build Linux Kernel modules"
    print_info "** Installing Linux Kernel modules into rootfs path"
    make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE- INSTALL_MOD_PATH=$rootfspath modules_install
    for i in $(find $rootfspath | grep .ko); do
        gzip -9 $i;
    done
    check $? "Install Linux Kernel modules"
} # kernel_modules
#-----------------------------------------------------------

#--------------- Building Linux Kernel with rootfs ---------
kernel_with_rootfs() {
    print_info "** Building Linux Kernel with rootfs"
    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 $? "Build Linux Kernel with rootfs"
    print_info "** Installing Linux Kernel into images path"
    # make ARCH=$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() {
    srcurl=https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-${KERNEL_VERSION}.tar.xz
    print_info "** Building Linux Kernel headers"
    [ -d $build/kernel-headers ] && return 0
    [ ! -d $build/kernel-headers ] && mkdir $build/kernel-headers
    cd $build/kernel-headers
    if [ "${BOARD_NAME}" = "orangepi_zero_2w" ]; then
        if [ ! -f $root/downloads/linux-orangepi-orange-pi-6.1-sun50iw9.tar.xz ]; then
            print_info "** Downloading https://gitea.home.com:3000/api/packages/TolaMironcenko/generic/linux/orangepi-orange-pi-6.1-sun50iw9/linux-orangepi-orange-pi-6.1-sun50iw9.tar.xz"
            cd $root/downloads
            wget https://gitea.home.com:3000/api/packages/TolaMironcenko/generic/linux/orangepi-orange-pi-6.1-sun50iw9/linux-orangepi-orange-pi-6.1-sun50iw9.tar.xz
            check $? "download https://gitea.home.com:3000/api/packages/TolaMironcenko/generic/linux/orangepi-orange-pi-6.1-sun50iw9/linux-orangepi-orange-pi-6.1-sun50iw9.tar.xz"
            cd -
        fi
        tar -xf $root/downloads/linux-orangepi-orange-pi-6.1-sun50iw9.tar.xz
        check $? "Extract Linux Kernel"
    else
        if [ ! -f $root/downloads/linux-${KERNEL_VERSION}.tar.xz ]; then
            print_info "** Downloading $srcurl"
            cd $root/downloads
            wget $srcurl
            check $? "download $srcurl"
            cd -
        fi
        tar -xf $root/downloads/linux-$KERNEL_VERSION.tar.xz
        check $? "Extract Linux Kernel"
    fi
    cd linux-$KERNEL_VERSION
    make ARCH=$ARCH headers
    check $? "Build kernel headers"
    make INSTALL_HDR_PATH=$rootfspath/usr headers_install
    check $? "Install kernel headers to rootfs"
}