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# Maintainer: Jaron Kent-Dobias <jaron@kent-dobias.com>
# Contributor: Vasily Khoruzhick <anarsoul@gmail.com>
# Contributor: Jan Alexander Steffens (heftig) <heftig@archlinux.org>

pkgbase=linux-raspberrypi4
_kver=6.6.54.rpi1
_zver=2.2.6
pkgver="${_kver}_${_zver}"
pkgrel=1
pkgdesc='Raspberry Pi Linux'
url='https://git.kent-dobias.com/system/linux'
arch=(aarch64)
license=(GPL2)
makedepends=(
  bc
  cpio
  gettext
  libelf
  pahole
  perl
  python
  tar
  xz

  dtc
  clang
  llvm
  lld

  git
  python-setuptools
  python-cffi
)
options=('!strip')
_srcname=linux-v${_kver%.*}-${_kver##*.}
_srctag=v${_kver%.*}-${_kver##*.}
source=(
  "https://git.kent-dobias.com/system/linux/snapshot/linux-${_srctag}.tar.gz"
  "git+https://github.com/openzfs/zfs#tag=zfs-${_zver}"
  config  # the main kernel config file
)
validpgpkeys=(
  ABAF11C65A2970B130ABE3C479BE3E4300411886  # Linus Torvalds
  647F28654894E3BD457199BE38DBBDC86092693E  # Greg Kroah-Hartman
  A2FF3A36AAA56654109064AB19802F8B0D70FC30  # Jan Alexander Steffens (heftig)
  0E3A444DD0760E65901BF59679E824090BD31086  # Jaron Kent-Dobias
)
# https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
sha256sums=('b6bc6067d368fffe69845bedd8bd613ee9d1c04c5acbb243b381256d4d67e273'
            '3db3f14e911a4e8a221b0291a2e8bade3c66e1f250714eeea9e04fa0e37399ab'
            'ad54207e8e2728d51a3e6468ddcd2b34a277179d0c7eea054c18f7eb86c16c33')
b2sums=('9023b4bfee6ad63334a62835912868af776d73dd3caae91ec1d382c7aaa0de37797891d6d66d35315fb0bba3574911d775bc6fbbda03d2085e9bdb493e8d8e0d'
        'd4e6f96d50e1be4da081f47b011c339aad69701fb28e3f70ea873f36e48ad641539991957f6124bb71902c270986a15aec2589002fd6fd8369a519ae6ce34a0e'
        '4d4e3a657e67b5cb8fb291d124e1459cf4dd56a03808aabfc9507c16e9e51bad80727764a764bc31519cd41fdaf61aadce51a21a67e236d774d9ff040a26c648')

export KBUILD_BUILD_HOST=archlinux
export KBUILD_BUILD_USER=$pkgbase
export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"
export ARCH=arm64
export LLVM=1

prepare() {
  cd "${_srcname}"

  echo "Setting version..."
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "${pkgbase#linux}" > localversion.20-pkgname

  echo "Setting config..."
  cp ../config .config
  make olddefconfig
  make prepare

  cd ../zfs

  for src in "${source[@]}"; do
    src="${src%%::*}"
    src="${src##*/}"
    src="${src%.zst}"
    [[ $src = *.patch && $src = zfs* ]] || continue
    echo "Applying patch $src..."
    patch -Np1 < "../$src"
  done

  ./autogen.sh
  KERNEL_LLVM=1 CC=clang \
  ./configure --prefix=/usr --sysconfdir=/etc --sbindir=/usr/bin --with-mounthelperdir=/usr/bin \
              --libdir=/usr/lib --datadir=/usr/share --includedir=/usr/include \
              --with-udevdir=/usr/lib/udev --libexecdir=/usr/lib \
              --enable-systemd --enable-pyzfs \
              --with-zfsexecdir=/usr/lib/zfs --localstatedir=/var \
              --enable-linux-builtin --with-linux=../$_srcname
  ./copy-builtin ../$_srcname

  cd ../$_srcname

  cp ../config .config

  make olddefconfig
  diff -u ../config .config || :

  make -s kernelrelease > version
  echo "Prepared $pkgbase version $(<version)"
}

build() {
  cd $_srcname
  make all
# make htmldocs
}

_package() {
  pkgdesc="The $pkgdesc kernel and modules"
  depends=(
    coreutils
    initramfs
    kmod
  )
  optdepends=(
    'wireless-regdb: to set the correct wireless channels of your country'
    'linux-firmware: firmware images needed for some devices'
  )
  provides=(
    KSMBD-MODULE
    VIRTUALBOX-GUEST-MODULES
    WIREGUARD-MODULE
    zfs
  )
  replaces=(
    virtualbox-guest-modules-arch
    wireguard-arch
  )

  cd $_srcname
  local modulesdir="$pkgdir/usr/lib/modules/$(<version)"

  echo "Installing boot image..."
  install -Dm644 arch/arm64/boot/Image "${pkgdir}/boot/kernel8.img"

  # systemd expects to find the kernel here to allow hibernation
  # https://github.com/systemd/systemd/commit/edda44605f06a41fb86b7ab8128dcf99161d2344
  install -Dm644 "$(make -s image_name)" "$modulesdir/vmlinuz"

  # Used by mkinitcpio to name the kernel
  echo "$pkgbase" | install -Dm644 /dev/stdin "$modulesdir/pkgbase"

  echo "Installing modules..."
  ZSTD_CLEVEL=19 make INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 \
    DEPMOD=/doesnt/exist modules_install  # Suppress depmod

  echo "Installing dtbs..."
  make INSTALL_DTBS_PATH="${pkgdir}/boot/dtbs" dtbs_install
  find "${pkgdir}/boot/dtbs/broadcom" -type f -print0 | xargs -0 mv -t "${pkgdir}/boot"

  # remove build link
  rm "$modulesdir"/build
}

pkgname=("$pkgbase")
for _p in "${pkgname[@]}"; do
  eval "package_$_p() {
    $(declare -f "_package${_p#$pkgbase}")
    _package${_p#$pkgbase}
  }"
done

# vim:set ts=8 sts=2 sw=2 et: