build-kernel-src

#!/bin/sh
set -e
export LLVM=1 && export LLVM_IAS=1

SOURCE_DIR="$(dirname "$(realpath "$0")")/source"
FILES_DIR="$(dirname "$(realpath "$0")")/files"

if [ -z "$MAKEOPTS" ]; then
    export MAKEOPTS="-j $(expr "$(nproc)" '+' 4) --load-average $(expr "$(nproc)" '+' 1)"
fi

# Install Kernel
rm -rf kernel && git clone "$SOURCE_DIR"/kernel kernel && pushd kernel
    PATCH_LIST="
        $(find "$SOURCE_DIR"/xanmod/linux-7.1.y-xanmod -type f -name '*.patch' | grep -v -f "$FILES_DIR"/xanmod/patch.blacklist | sort)
        $(ls "$SOURCE_DIR"/cachy/7.1/misc/{0001-aufs*,0001-clang-polly}.patch)
        $FILES_DIR/cachy/0001-Fixup-aufs-m-missing-symbols.patch
    "
    for PATCH in $PATCH_LIST; do
        echo "Patching: $PATCH" >&2
        git apply "$PATCH"
    done
    make defconfig
    ./scripts/config \
        --enable MEMORY_HOTPLUG --enable MEMORY_HOTREMOVE --enable ZONE_DEVICE --enable DEVICE_PRIVATE
    if [ ! -z "$TEST_CONFIG_PATH" ]; then
        cat "$TEST_CONFIG_PATH" >.config
    fi
    make olddefconfig
    make $MAKEOPTS
popd
KERNEL_DIR="$(realpath kernel)"

# Install NVIDIA
rm -rf nvidia && git clone "$SOURCE_DIR"/nvidia nvidia && pushd nvidia
    PATCH_LIST="
        $(find "$SOURCE_DIR"/cachy/7.1/misc/nvidia -type f -name '*.patch' | grep -v -f "$FILES_DIR"/cachy/nvidia-patch.blacklist  | sort)
        $FILES_DIR/nvidia/0001-Enable-in-tree-build.patch
    "
    for PATCH in $PATCH_LIST; do
        echo "Patching: $PATCH" >&2
        git apply "$PATCH"
    done
    ./copy-builtin "$KERNEL_DIR"
popd

# Install zfs
rm -rf zfs && git clone "$SOURCE_DIR"/zfs zfs && pushd zfs
    sed -i 's/CDDL/GPL/g' META # Evil, i know...
    sed -i 's/\/Kbuild//g' module/.gitignore
    echo >include/.gitignore
    sh autogen.sh
    ./configure --disable-nls --disable-rpath \
        --enable-linux-builtin --enable-linux-experimental --with-linux="$KERNEL_DIR"
    ./copy-builtin "$KERNEL_DIR"
popd

# Install bcachefs
rm -rf bcachefs && git clone "$SOURCE_DIR"/bcachefs bcachefs && pushd bcachefs
    PATCH_LIST="
        $FILES_DIR/bcachefs/*.patch
    "
    for PATCH in $PATCH_LIST; do
        echo "Patching: $PATCH" >&2
        git apply "$PATCH"
    done
    bash "$FILES_DIR"/bcachefs/copy-builtin.sh "$KERNEL_DIR"
popd

# Test Kernel
pushd kernel
    make mrproper
    make olddefconfig
    ./scripts/config \
	--module ZFS \
        --enable UNICODE --module BCACHEFS_FS --enable BCACHEFS_QUOTA \
        --enable PCI --enable DRM --enable MEMORY_HOTPLUG --enable MEMORY_HOTREMOVE --enable ZONE_DEVICE --enable DEVICE_PRIVATE --module NVIDIA --module NVIDIA_MODESET --module NVIDIA_DRM --module NVIDIA_UVM --module NVIDIA_PEERMEM
    if [ ! -z "$TEST_CONFIG_PATH" ]; then
        cat "$TEST_CONFIG_PATH" >.config
    fi
    make olddefconfig
    if [ -z "$SKIP_TEST" ]; then
        make $MAKEOPTS
    fi
popd

# Clean KernelTree
pushd kernel
    make mrproper
    git clean -Xdf
    git add .
popd

# Package Source
rm -f cl-kernel.tar.zst cl-kernel.patch.zst
tar --exclude=.git --transform "s/^kernel/linux-$(make -C kernel kernelversion | grep -E '([0-9]*)\.([0-9]*)\.([0-9]*)')/" -cf source.tar kernel
git -C kernel diff --binary --cached >from-upstream.patch
zstd -T0 --long --ultra -22 --progress --rm source.tar from-upstream.patch