# Maintainer: jc_gargma <jc_gargma@iserlohn-fortress.net>
# Maintainer (Manjaro): Dan Johansen <strit@manjaro.org>
# Contributor (ArchArm): Kevin Mihelich <kevin@archlinuxarm.org>

# # I maintain this because:
# Manjaro version patch script does not apply consistently
# Arch version lacks ath9k regdom and raid6 algo patches
# Manjaro version uses git
# Manjaro version lacks cake modules

pkgbase=linux-pinebookpro
_pkgname=linux-pinebook-pro
_exname=pinebookpro
_supver=5
_majver=4
_minver=0
  if [ "$_minver" == "0" ]; then
    pkgver=${_supver}.${_majver}
  else
    pkgver=${_supver}.${_majver}.${_minver}
  fi
pkgrel=11
pkgdesc='Linux-PineBookPro'
url='https://gitlab.manjaro.org/tsys/linux-pinebook-pro'
arch=(aarch64)
#arch=(x86_64)
license=(GPL2)
makedepends=(
  bc kmod libelf
  dtc uboot-tools vboot-utils
)
provides=('linux')
conflicts=('linux')
options=('!strip')
_srcname=linux-${pkgver}
_commit=a48441783fc6f15bd076dc0d01ecc2913d79260a
source=(
  https://www.kernel.org/pub/linux/kernel/v${_supver}.x/${_srcname}.tar.{xz,sign}
  pinebookpro-$_commit.patch
  0001-net-smsc95xx-Allow-mac-address-to-be-set-as-a-parame.patch
  0001-arm64-dts-rockchip-remove-capacity-dmips-rk3399.patch
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-CLONE_NEWUSER.patch
  ath9k-regdom-hack.patch
  raid6-default-algo.patch
  config         # the main kernel config file
  kernel.its
  kernel.keyblock
  kernel_data_key.vbprivk
  linux.preset
  60-linux.hook
  90-linux.hook
)
validpgpkeys=(
  'ABAF11C65A2970B130ABE3C479BE3E4300411886'  # Linus Torvalds
  '647F28654894E3BD457199BE38DBBDC86092693E'  # Greg Kroah-Hartman
)
# https://www.kernel.org/pub/linux/kernel/v5.x/sha256sums.asc
sha256sums=('bf338980b1670bca287f9994b7441c2361907635879169c64ae78364efc5f491'
            'SKIP'
            '4b42263a879a282dd449897d9531dc007696e3a13cda3295aa49106007ecf94d'
            '5ed674a3a420c1a93b77cb9e243c202996d3783138182816fc37a17367a84474'
            '5e83715ae4d1ffe179091f88f2443cb068007c20b77b833eb2908e4d64217564'
            'e862ecd2cb0b20e1859ec3e47616457a9a3acb111cd5a86094f9ed1dbd7f42ac'
            'e7ebf050c22bcec0028c0b3c79fd6d3913b0370ecc6a23dfe78ce475630cf503'
            '0f81d6e4158b7beeb0eb514f1b9401f7e23699cb0f7b0d513e25dae1815daaeb'
            '8f9c5b6b6d9d84e24dcb63f3aad62cd86e0e04064cacc8da42ecfda20a08eaca'
            'd074a28bd31972fbca42f9e91624a2f873350428a89d9a9af6d0ace32686475f'
            '4e708c9ec43ac4a5d718474c9431ba6b6da3e64a9dda6afd2853a9e9e3079ffb'
            'bc9e707a86e55a93f423e7bcdae4a25fd470b868e53829b91bbe2ccfbc6da27b'
            '66644820faa950a5fc59181f5aefcbed6d7ed652b29aee69979a2be2a032025d'
            'ae2e95db94ef7176207c690224169594d49445e04249d2499e9d2fbc117a0b21'
            '71df1b18a3885b151a3b9d926a91936da2acc90d5e27f1ad326745779cd3759d')

export KBUILD_BUILD_HOST=$_exname
export KBUILD_BUILD_USER=$pkgbase
export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"

prepare() {
  cd $_srcname

  # add upstream patch
#  if [ "$_minver" != "0" ]; then
#    msg2 "Applying upstream patch"
#    patch -Np1 < ../patch-${_supver}.${_majver}-${pkgver}
#  fi

  # Out of tree changes for pinebookpro to function
  msg2 "Applying pinebookpro patch"
  patch -p1 -i ../pinebookpro-$_commit.patch

  # ALARM patches
  patch -Np1 -i ..//0001-net-smsc95xx-Allow-mac-address-to-be-set-as-a-parame.patch

  # Manjaro ARM Patches
  patch -Np1 -i ../0001-arm64-dts-rockchip-remove-capacity-dmips-rk3399.patch


  # Hotfixes
  msg2 "Applying hotfixes"
  patch -p1 -i ../0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-CLONE_NEWUSER.patch


  # Ignore ath9k eeprom patch
  msg2 "Applying ath9k patch"
  patch -p1 -i ../ath9k-regdom-hack.patch

  # Set default raid6 algo patch
  msg2 " Applying raid6 patch"
  patch -p1 -i ../raid6-default-algo.patch


  msg2 "Setting version..."
  scripts/setlocalversion --save-scmversion
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "${pkgbase#linux}" > localversion.20-pkgname


  msg2 "Setting config..."
  # we are in src/linux-x.yy.zz, looking for a config next to the pkgbuild
#  if [ -f ${SRCDEST}/config.previous ]; then
#    cp ${SRCDEST}/config.previous .config
#  else
    cp ../config .config
#  fi

  make olddefconfig

#  make menuconfig

  # Remove sublevel when no sublevel exists
  if [ "$_minver" == "0" ]; then
    sed -i '/SUBLEVEL = 0/d' Makefile
  fi

  make -s kernelrelease > version

  # workaround for make -s kernelrelease not applying
  # localversion to version when changed using menuconfig
  grep -Po '(?<=CONFIG_LOCALVERSION=").*(?=")' .config > ../localversion
  echo "$pkgver" > ../version.temp
  cat "localversion.10-pkgrel" >> ../version.temp
  cat "localversion.20-pkgname" >> ../version.temp
  cat ../localversion >> ../version.temp
  cat ../version.temp | tr -d "\n" > version

  # back up the config
#  msg2 "Backing up config..."
#  cp .config ${SRCDEST}/config.previous

  msg2 "Prepared %s version %s" "$pkgbase" "$(<version)"

  # don't run depmod on 'make install'. We'll do this ourselves in packaging
  sed -i '2iexit 0' scripts/depmod.sh

}

build() {
  cd $_srcname
  make Image Image.gz modules
  # Generate device tree blobs with symbols to support applying device tree overlays in U-Boot
  make DTC_FLAGS="-@" dtbs
}

_package() {
  pkgdesc="The $pkgdesc kernel and modules"
  depends=(coreutils kmod initramfs)
  optdepends=('crda: to set the correct wireless channels of your country'
              'linux-firmware: firmware images needed for some devices')

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

  msg2 "Installing boot image..."
  # systemd expects to find the kernel here to allow hibernation
  # https://github.com/systemd/systemd/commit/edda44605f06a41fb86b7ab8128dcf99161d2344
  install -Dm644 "$(make -s image_name)" "$modulesdir/vmlinux"

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

  mkdir -p "${pkgdir}"/{boot,usr/lib/modules}

  msg2 "Installing modules..."
  make INSTALL_MOD_PATH="$pkgdir/usr" modules_install

  msg2 "Installing dtbs..."
  make INSTALL_DTBS_PATH="${pkgdir}/boot/dtbs" dtbs_install

  cp arch/arm64/boot/Image{,.gz} "${pkgdir}/boot"

  # make room for external modules
  local _extramodules="extramodules-${kernver}"
  ln -s "../${_extramodules}" "${pkgdir}/usr/lib/modules/${kernver}/extramodules"

  # add real version for building modules and running depmod from hook
  echo "${kernver}" |
    install -Dm644 /dev/stdin "${pkgdir}/usr/lib/modules/${_extramodules}/version"

  # remove build and source links
  rm "$modulesdir"/{source,build}

  # now we call depmod...
  depmod -b "${pkgdir}/usr" -F System.map "${kernver}"

  # add vmlinux
  install -Dt "${pkgdir}/usr/lib/modules/${kernver}/build" -m644 vmlinux

  # sed expression for following substitutions
  local _subst="
    s|%PKGBASE%|${pkgbase}|g
    s|%KERNVER%|${kernver}|g
    s|%EXTRAMODULES%|${_extramodules}|g
  "

  # install mkinitcpio preset file
  sed "${_subst}" ../linux.preset |
    install -Dm644 /dev/stdin "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"

  # install pacman hooks
  sed "${_subst}" ../60-linux.hook |
    install -Dm644 /dev/stdin "${pkgdir}/usr/share/libalpm/hooks/60-${pkgbase}.hook"
  sed "${_subst}" ../90-linux.hook |
    install -Dm644 /dev/stdin "${pkgdir}/usr/share/libalpm/hooks/90-${pkgbase}.hook"


  msg2 "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}

_package-headers() {
  pkgdesc="Header files and scripts for building modules for $pkgdesc kernel"

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

  msg2 "Installing build files..."
  install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
    localversion.* version vmlinux
  install -Dt "$builddir/kernel" -m644 kernel/Makefile
  install -Dt "$builddir/arch/arm64" -m644 arch/arm64/Makefile
  cp -t "$builddir" -a scripts

  # add objtool for external module building and enabled VALIDATION_STACK option
  if [[ -e tools/objtool/objtool ]]; then
    install -Dt "$builddir/tools/objtool" tools/objtool/objtool
  fi

  # add xfs and shmem for aufs building
  mkdir -p "$builddir"/{fs/xfs,mm}

  msg2 "Installing headers..."
  cp -t "$builddir" -a include
  cp -t "$builddir/arch/arm64" -a arch/arm64/include
  mkdir -p "$builddir/arch/arm"
  cp -t "$builddir/arch/arm" -a arch/arm/include
  install -Dt "$builddir/arch/arm64/kernel" -m644 arch/arm64/kernel/asm-offsets.s arch/arm64/kernel/module.lds

  install -Dt "$builddir/drivers/md" -m644 drivers/md/*.h
  install -Dt "$builddir/net/mac80211" -m644 net/mac80211/*.h

  # http://bugs.archlinux.org/task/13146
  install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h

  # http://bugs.archlinux.org/task/20402
  install -Dt "$builddir/drivers/media/usb/dvb-usb" -m644 drivers/media/usb/dvb-usb/*.h
  install -Dt "$builddir/drivers/media/dvb-frontends" -m644 drivers/media/dvb-frontends/*.h
  install -Dt "$builddir/drivers/media/tuners" -m644 drivers/media/tuners/*.h

  msg2 "Installing KConfig files..."
  find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;

  msg2 "Removing unneeded architectures..."
  local arch
  for arch in "$builddir"/arch/*/; do
    [[ $arch = */arm64/ || ${_arch} == */arm/ ]] && continue
    echo "Removing $(basename "$arch")"
    rm -r "$arch"
  done

  msg2 "Removing documentation..."
  rm -r "$builddir/Documentation"

  msg2 "Removing broken symlinks..."
  find -L "$builddir" -type l -printf 'Removing %P\n' -delete

  msg2 "Removing loose objects..."
  find "$builddir" -type f -name '*.o' -printf 'Removing %P\n' -delete

  msg2 "Stripping build tools..."
  local file
  while read -rd '' file; do
    case "$(file -bi "$file")" in
      application/x-sharedlib\;*)      # Libraries (.so)
        strip -v $STRIP_SHARED "$file" ;;
      application/x-archive\;*)        # Libraries (.a)
        strip -v $STRIP_STATIC "$file" ;;
      application/x-executable\;*)     # Binaries
        strip -v $STRIP_BINARIES "$file" ;;
      application/x-pie-executable\;*) # Relocatable binaries
        strip -v $STRIP_SHARED "$file" ;;
    esac
  done < <(find "$builddir" -type f -perm -u+x ! -name vmlinux -print0)

  msg2 "Adding symlink..."
  mkdir -p "$pkgdir/usr/src"
  ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase"

  msg2 "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}

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