# 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=14
_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/${_srcname}.tar.{xz,sign}
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
  0002-lib-devres-add-a-helper-function-for-ioremap_uc.patch
  0003-mfd-intel-lpss-Use-devm_ioremap_uc-for-MMIO.patch
  0004-PCI-pciehp-Prevent-deadlock-on-disconnect.patch
  0005-ACPI-PM-s2idle-Rework-ACPI-events-synchronization.patch
  0006-iwlwifi-pcie-restore-support-for-Killer-Qu-C0-NICs.patch
  0007-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-s.patch
  0008-drm-i915-Fix-audio-power-up-sequence-for-gen10-displ.patch
  0009-drm-i915-extend-audio-CDCLK-2-BCLK-constraint-to-mor.patch
  0010-drm-i915-Limit-audio-CDCLK-2-BCLK-constraint-back-to.patch
  0011-pinctrl-sunrisepoint-Add-missing-Interrupt-Status-re.patch
  0012-Revert-iwlwifi-mvm-fix-scan-config-command-size.patch
  0013-e1000e-Revert-e1000e-Make-watchdog-use-delayed-work.patch
  0014-drm-amdgpu-Add-DC-feature-mask-to-disable-fractional.patch
  linux-ck-patch-${_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=('eb0286a193b29754562771905db13e6d2140dc577d88be8e8f91f0ab77b9adbe915bb74e89e10e5dce3763f3efce6204c973f5d3341dba9e11ecb544500be5a3'
        'SKIP'
        '76c34ea8f8d6fafcbb12fa0e01821af5926e60046c37cee9855786b8bfe16b8ac5222d441335aa01b62e7ebfe2805a1175d00d3bc4ee1c2617173934284c4164'
        '5427a9283a9ccb38a63ba5bd680e331245bd134501ce66e912cb07c250e37810a895f4ae78371db2b0cfcbfcb1bee96daafc0e5c71f40ec9b8643d3a88a80bab'
        'fab987c7c77e07ae2db83d148e8d423e6aadbcfc84498a60a6396418c69108c0a38a426eca57c1e94f2540f25cbcd084eafe3d124ac9d0ce2ab4efff28852a16'
        'c5cd99138e9436ede9136e5f958a15a10e07ab51e77dc716158b1ff774d9fa06f4ec2b7a1ba171f4ea86c16ea61fb685b54cadb85411b1c7c468d984b495585d'
        'd283a69b0577dda72ae5814b3c681ca5f0655692216ce77cccc909903fda037feae35fc545c6d54daa377edb71895cfc4f199a335f3f4dfda3cde90350a627b3'
        '2328a9bddbb712ffe587a2266d9c6074b4a9e1273b4546e86c56b26dcd7c509398a3e428e6292999bb0297f135683793fa28acfbc4d744962e2ca396943d9ddb'
        'a7318e80116cecfe0c31e254c6d52706ce56d202064d9ff851506569ad602ed106bce216facf793a27266a58b372092e5fa4a19b7b4a7380a789874066d91852'
        'ab7c15c8a219a7e895b39a10a452005252bb018749607676a7e436263a0876d096a5716c9bcbf30e2ff6bc4e525be22ac3838ab3d363373945d5bf5ce43648d4'
        'bb35fce00e121769f4a85c01a799efa7e3eccae8fdd29993d5bbd574a2af50cabeafcf6a9bebf5713223cdb64a53fd7bbf41de7f0a84023531b160e0fe88dc52'
        '26082d1d89d9a6e44ea29be9056029f4af228cf22d6c4f6c9f32ed552859bcb8982dc57f63bcb216e220590a029800aeade0bf47356f7ef3ebbe9c0261674379'
        'aba17d1a3a4638d997c33ea385cfd4ac4008a13f31c026e86342169117aa6b238cdebdc4ddbe234e54c68816386ac0e401ecd9e5b49bd42e1ef60eecdf3ad89a'
        'd4878831fa03c17b590001d15ddbbfeb1a8747c961503c26aee330d213c0fbf6c2eab7226456083f52a5fb4b4ffd9bf7b2db741de7c7476a15873f2a8d9f7b74'
        '76bb50a23b822de85f3381a511b42bb46110a39d31ede81bd168cb708882b93be525576b1805da5383f35f6f18fab817ad195aa870ab75e7775855a150d172a1'
        '726d89aeb1f5df51cfa395e01edb4b8b36460b1f75611ee921d057dfb28cd2d6c41990bca4b40512b9398e0558c4028845252442d9ec1d8f13847a0ed9903a1d'
        '8faff0d2b95eda0b96e8042367634c45c1e823238e99793daeda5614efdc448dfe28172bf13f0d988cf4d5cbb4892089893e0183cd8825de7f54942283f2b5a0'
        '1892bd22775eac3bcc4d37f4fd30c95346bf3a0888cbbff57fd614973b525390dff2e315ce35b2e498523cceaab94ff21a80475dee8df3de4dd8fc0fab07d74e'
        '0b11c09e01a7480466d5237a8792c941c9af3e8d6584ffd84285cd9569f5355c10879566ce5846ef9263535020c53e1aa6c58100a571b537ccb7f2431baf7996'
        '2e58bb89b247b1678355368956e67c1de51fcde97a227b2162f6771e30f17fa5520faafe7be4b6816a542e7ae10d05f64c6b6354f352c12746d4b8da632936dd'
        'fde132f3705d908e6f2147c78a2193289916d72304ca5efa2229d79fc3e57a857314ce94e71425caef2f7f7b6cf87f05ef86335dc8bd4be78e7035afe608005a'
        '58e09bb87b4780228e6c347171f06a854356e9af21d1bbb3b697848a13c0d196fc8863c6b1343e7ee0b87c43e739132cd8978f31b4aaf04da1cee728b9d1236d')

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


  # Hotfixes
  echo "Applying hotfixes"
  patch -p1 -i ../0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.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-Prevent-deadlock-on-disconnect.patch
  patch -p1 -i ../0005-ACPI-PM-s2idle-Rework-ACPI-events-synchronization.patch
  patch -p1 -i ../0006-iwlwifi-pcie-restore-support-for-Killer-Qu-C0-NICs.patch
  patch -p1 -i ../0007-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-s.patch
  patch -p1 -i ../0008-drm-i915-Fix-audio-power-up-sequence-for-gen10-displ.patch
  patch -p1 -i ../0009-drm-i915-extend-audio-CDCLK-2-BCLK-constraint-to-mor.patch
  patch -p1 -i ../0010-drm-i915-Limit-audio-CDCLK-2-BCLK-constraint-back-to.patch
  patch -p1 -i ../0011-pinctrl-sunrisepoint-Add-missing-Interrupt-Status-re.patch
  patch -p1 -i ../0012-Revert-iwlwifi-mvm-fix-scan-config-command-size.patch
  patch -p1 -i ../0013-e1000e-Revert-e1000e-Make-watchdog-use-delayed-work.patch
  patch -p1 -i ../0014-drm-amdgpu-Add-DC-feature-mask-to-disable-fractional.patch


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

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


  # graysky gcc hotfixes
  echo "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
  echo "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
  echo "Applying ath9k patch"
  patch -p1 -i ../ath9k-regdom-hack.patch

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


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


  echo "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 $HOME/.config/modprobed.db ]; then
    echo "Running make localmodconfig"
    make LSMOD=$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
  echo "Backing up config..."
  cp .config ${SRCDEST}/config.ck.previous

  echo "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"

  echo "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"

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

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

  echo "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"

  echo "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}

  echo "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

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

  echo "Removing unneeded architectures..."
  local arch
  for arch in "$builddir"/arch/*/; do
    [[ $arch = */x86/ ]] && continue
    echo "Removing $(basename "$arch")"
    rm -r "$arch"
  done

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

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

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

  echo "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)

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

  echo "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