# Maintainer: jc_gargma <jc_gargma@iserlohn-fortress.net>
# Maintainer (Arch): Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
# Contributor: Aqua-sama <aqua@iserlohn-fortress.net>

# # I maintain this because:
# Arch version patch script does not apply consistently
# Arch version lacks graysky gcc patch with bdver2 fix
# Arch version lacks ath9k regdom and raid6 algo patches
# Arch version lacks ck patches
# Arch version is 300 Hz
# Arch version does not disable eee
# Arch version enables insecure filesystems and staging drivers
# Arch version enables ISDN and Infiniband
# Arch version enables VMware and HyperV
# Arch version builds documentation

pkgbase=linux-ck
_supver=5
_majver=4
_minver=8
_gccpatchver='20190822'
_ckpatchversion=ck1
  if [ "$_minver" == "0" ]; then
    pkgver=${_supver}.${_majver}
  else
    pkgver=${_supver}.${_majver}.${_minver}
  fi
pkgrel=1
pkgdesc='Linux-ck'
url='https://kernel.org'
#url='http://ck.kolivas.org/patches/'
arch=(x86_64)
license=(GPL2)
makedepends=(
  bc kmod libelf
)
conflicts=('linux-libre-ck')
options=('!strip')
_srcname=linux-${pkgver}
source=(
  https://www.kernel.org/pub/linux/kernel/v${_supver}.x/${_srcname}.tar.{xz,sign}
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-CLONE_NEWUSER.patch
  0002-lib-devres-add-a-helper-function-for-ioremap_uc.patch
  0003-mfd-intel-lpss-Use-devm_ioremap_uc-for-MMIO.patch
  0004-PCI-pciehp-Do-not-disable-interrupt-twice-on-suspend.patch
  0005-PCI-pciehp-Prevent-deadlock-on-disconnect.patch
  0006-ACPI-PM-s2idle-Rework-ACPI-events-synchronization.patch
  0007-iwlwifi-pcie-restore-support-for-Killer-Qu-C0-NICs.patch
  0008-x86-intel-Disable-HPET-on-Intel-Ice-Lake-platforms.patch
  0009-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-suspend.patch
  0010-drm-i915-Fix-audio-power-up-sequence-for-gen10-display.patch
  0011-drm-i915-extend-audio-CDCLK-2BCLK-constraint-to-more-platforms.patch
  0012-drm-i915-gt-Detect-if-we-miss-WaIdleLiteRestore.patch
  0013-pinctrl-sunrisepoint-Add-missing-Interrupt-Status-register-offset.patch
  linux-ck-patch-${_supver}.${_majver}-${_ckpatchversion}.xz::http://ck.kolivas.org/patches/${_supver}.0/${_supver}.${_majver}/${_supver}.${_majver}-${_ckpatchversion}/patch-${_supver}.${_majver}-${_ckpatchversion}.xz
  graysky_bdver2-hotfix.patch
  kernel_gcc_patch-${_gccpatchver}.tar.gz::https://github.com/graysky2/kernel_gcc_patch/archive/${_gccpatchver}.tar.gz
  ath9k-regdom-hack.patch
  raid6-default-algo.patch
  config         # the main kernel config file
)
validpgpkeys=(
  'ABAF11C65A2970B130ABE3C479BE3E4300411886'  # Linus Torvalds
  '647F28654894E3BD457199BE38DBBDC86092693E'  # Greg Kroah-Hartman
)
# https://www.kernel.org/pub/linux/kernel/v5.x/sha256sums.asc
b2sums=('5b3c3bc7e2c866c3c30bb64ba503b96e1f65415a610c1426c5075c49bce0c1f42a47eafbd64b2314360850a8cb8d8e08430d2154349a145aee3d622d59a18036'
        'SKIP'
        '8e25246725016ac6a1452592b092616aacba744ee6d1f87355b141011e31d91b2faca01494930a8bb4b816f92f86929098cc60bf786bdc68513e7bc572b06226'
        '0e4e01200c6250c6d251d2cb38889e9f488e07b1014ea8c8f81182457cf057ce444b14e21afc786671115ec0b100e3ce9b32a5785c2b0b07b11d956887f477d3'
        'd3b62df935c6f5379b4c11f455a7231ffbab58857bdd650256499a702e54aaa729348054beb7742b90f145893622538aa4345c117238d46687ef6d07d62655da'
        'f2d71e3652594d7c23c87a952c40a3c2d394f6a621dce6a19a0463108695c55f5505d9526abb5283b74e3f84ae51283aeaf0e76a78e8e0133b0b07828def1d1d'
        'bf786a19dd0cc8572880f8339711fa173219b2cb9f44b2a4e48591671770c075706ea6db673ddd2cd49d42bdb2723e0161a704f77c761df5fdf31b033f45b6a0'
        '8083144de9dcf8750a502589625d6d16c2316dfb01dddf6b502dbcf5d1632822ed1cee05e5eb0ecf58cd88726cda84b0ea493c1ab6df3a862886756aa78d540a'
        '7a9081dee4774f8b2f51dcd980bfcd085ead77fb07915026044792bdf1c8831626173471a2c2cac0e1420fe7f23954b9101eab4884c78c33115f096cd5f560e9'
        'c5e15240574b97ab7beaba5b4ba50bdc6f618f8e1c7be0ad5a13b8ab7e36ab5ae52e71ec055e49cbed53ae54f92eb772de528f19c1d20f5a98914b4dae411f42'
        'f28183f6fd07ba0e6787e935d56dd683435e0bdd6e04cba717aa5b0da093d40a79a422f3398b813e41d70411cbd664045518050fd9b61a0350e75e36e747c345'
        '7fc476dc0fef4d0a11c3f04c33a0350eae87115dcafcfb96a453112041ba88e1cf5a3535c95069568c849f04c356e2bde0686c8e5ba25be7a781b775f808a43c'
        '9d1ad2023e9ffc92a4ccb6194a858267fbb6286c13784b8b8a2af3d5814abd0e4229409489f8a6bea5157193324dba58553ba03229169809bec73a8cc59c26ba'
        'da61a317ad2994f3c0cfe320cfd2d731eaa2aafe0a0fb52d3118e50a2a4299842e94b478a49bfb629a82571f50bcb6c52174808311711e3d3ee05df205881ab2'
        '782f41ae6352cfc1c47ed54eddcded54969c7d43a326dc2d6593b373b4dc4672bc82a6d938090635dc02ef3b3b74e133a2170c7f9c6fd614641c7cb3b013ff2e'
        '8faff0d2b95eda0b96e8042367634c45c1e823238e99793daeda5614efdc448dfe28172bf13f0d988cf4d5cbb4892089893e0183cd8825de7f54942283f2b5a0'
        '1892bd22775eac3bcc4d37f4fd30c95346bf3a0888cbbff57fd614973b525390dff2e315ce35b2e498523cceaab94ff21a80475dee8df3de4dd8fc0fab07d74e'
        '0b11c09e01a7480466d5237a8792c941c9af3e8d6584ffd84285cd9569f5355c10879566ce5846ef9263535020c53e1aa6c58100a571b537ccb7f2431baf7996'
        '2e58bb89b247b1678355368956e67c1de51fcde97a227b2162f6771e30f17fa5520faafe7be4b6816a542e7ae10d05f64c6b6354f352c12746d4b8da632936dd'
        'fde132f3705d908e6f2147c78a2193289916d72304ca5efa2229d79fc3e57a857314ce94e71425caef2f7f7b6cf87f05ef86335dc8bd4be78e7035afe608005a'
        'd7a69e201352f7e8a1e311a03873f87478ef01fece82c040caec7043b9575f79b551274dc50a36b92870dcf74609b82b729a459a91f152e56d2284690de6d0a9')

#export KBUILD_BUILD_HOST=arc4linux
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


  # Hotfixes
  msg2 "Applying hotfixes"
  patch -p1 -i ../0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-CLONE_NEWUSER.patch
  patch -p1 -i ../0002-lib-devres-add-a-helper-function-for-ioremap_uc.patch
  patch -p1 -i ../0003-mfd-intel-lpss-Use-devm_ioremap_uc-for-MMIO.patch
  patch -p1 -i ../0004-PCI-pciehp-Do-not-disable-interrupt-twice-on-suspend.patch
  patch -p1 -i ../0005-PCI-pciehp-Prevent-deadlock-on-disconnect.patch
  patch -p1 -i ../0006-ACPI-PM-s2idle-Rework-ACPI-events-synchronization.patch
  patch -p1 -i ../0007-iwlwifi-pcie-restore-support-for-Killer-Qu-C0-NICs.patch
  patch -p1 -i ../0008-x86-intel-Disable-HPET-on-Intel-Ice-Lake-platforms.patch
  patch -p1 -i ../0009-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-suspend.patch
  patch -p1 -i ../0010-drm-i915-Fix-audio-power-up-sequence-for-gen10-display.patch
  patch -p1 -i ../0011-drm-i915-extend-audio-CDCLK-2BCLK-constraint-to-more-platforms.patch
  patch -p1 -i ../0012-drm-i915-gt-Detect-if-we-miss-WaIdleLiteRestore.patch
  patch -p1 -i ../0013-pinctrl-sunrisepoint-Add-missing-Interrupt-Status-register-offset.patch

  # fix naming schema in EXTRAVERSION of ck patch set
  sed -i -re "s/^(.EXTRAVERSION).*$/\1 = /" "../linux-ck-patch-${_supver}.${_majver}-${_ckpatchversion}"

  # ck patch
  msg2 "Applying ck patch"
  patch -F 3 -Np1 -i ../linux-ck-patch-${_supver}.${_majver}-${_ckpatchversion}


  # graysky gcc hotfixes
  msg2 "Applying graysky gcc patch hotfixes"
  patch -p1 -i ../graysky_bdver2-hotfix.patch "$srcdir/kernel_gcc_patch-${_gccpatchver}/enable_additional_cpu_optimizations_for_gcc_v9.1+_kernel_v4.13+.patch"

  # graysky gcc patch
  msg2 "Applying graysky cpu patch"
  patch -p1 -i ../kernel_gcc_patch-${_gccpatchver}/enable_additional_cpu_optimizations_for_gcc_v9.1+_kernel_v4.13+.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.ck.previous ]; then
    cp ${SRCDEST}/config.ck.previous .config
  else
    cp ../config .config
  fi

  make olddefconfig

  if [ -f $HOME/.config/modprobed.db ]; then
    msg2 "Running make localmodconfig"
    make LSMOD=$HOME/.config/modprobed.db localmodconfig
  fi

  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.ck.previous

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

build() {
  cd $_srcname
  make bzImage modules
}

_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/vmlinuz"

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

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

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

  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 "$builddir/arch/x86" -m644 arch/x86/Makefile
  cp -t "$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/x86" -a arch/x86/include
  install -Dt "$builddir/arch/x86/kernel" -m644 arch/x86/kernel/asm-offsets.s

  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 = */x86/ ]] && 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