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# Maintainer: jc_gargma <jc_gargma@iserlohn-fortress.net>
# Maintainer (Arch): Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
# Maintainer (Arch): Tobias Powalowski <tpowa@archlinux.org>
# Contributor: Aqua-sama <aqua@iserlohn-fortress.net>
# Contributor (Arch): Thomas Baechler <thomas@archlinux.org>

# # 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 is not configured for openrc
# 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
_majver=5.2
_minver=7
  if [ "$_minver" == "0" ]; then
    pkgver=${_majver}
  else
    pkgver=${_majver}.${_minver}
  fi
_ckpatchversion=ck1
_ckpatch="patch-${_majver}-${_ckpatchversion}"
_gccpatchver='20190714'
_srcname=linux-${pkgver}
pkgrel=1
url='https://kernel.org'
#url='http://ck.kolivas.org/patches/'
arch=('x86_64')
license=('GPL2')
makedepends=(
             'xmlto' 'kmod' 'inetutils' 'bc' 'libelf'
            )
conflicts=('linux-libre')
options=('!strip')
source=(
        https://www.kernel.org/pub/linux/kernel/v5.x/linux-$pkgver.tar.{xz,sign}
        0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch
        0002-ZEN-Add-CONFIG-for-unprivileged_userns_clone.patch
        0003-iwlwifi-mvm-disable-TX-AMSDU-on-older-NICs.patch
        0004-iwlwifi-Add-support-for-SAR-South-Korea-limitation.patch
        0005-netfilter-nf_tables-fix-module-autoload-for-redir.patch
        ck_remove-excess-extraversion.patch
        linux-ck-patch-${_majver}-${_ckpatchversion}.xz::http://ck.kolivas.org/patches/5.0/${_majver}/${_majver}-${_ckpatchversion}/${_ckpatch}.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.x86_64  # the main kernel config files
        60-linux.hook  # pacman hook for depmod
        90-linux.hook  # pacman hook for initramfs regeneration
        linux.preset   # standard config files for mkinitcpio ramdisk
       )
sha256sums=('db3e69936b9a4f2754838086417ab49039807cac6d62cb81bf642fb481835fa9'
            'SKIP'
            '91fafa76bf9cb32159ac7f22191b3589278b91e65bc4505cf2fc6013b8037bf3'
            '63e4378e69e2f23ed87af32a4951477a6d82d4ac0de2295db46502c8120da9d9'
            '8449de698dfc8f95ff03dbfd98b6abdd71dbc4238896256690cb856fe366aac3'
            'bcace026000869cffe107e33ba4facba93f2fda9a5a3c65b7576e30b7ee2c8d3'
            'f6eac8cc5a9e4f186d277b8679f78c1da14a42eeab40370f4f52ec5181af39a8'
            '152c551bd03e92d6458b0d9f352c97eb058014ab019fa213167a6f8178bd6d71'
            'f1abc13a8d859fbf6350040e45d7f04ad551a6d39f113ba96fbbd820118c0e36'
            '5d078323fc39482a8f828f721e55246d061914602f0cdadaa4787de50a2a6228'
            '2466fb4aecc66d1b258b4cbdb2f215b5099f266d8c4386bb62ad1a0acd0caf5b'
            'e7ebf050c22bcec0028c0b3c79fd6d3913b0370ecc6a23dfe78ce475630cf503'
            '0f81d6e4158b7beeb0eb514f1b9401f7e23699cb0f7b0d513e25dae1815daaeb'
            '8b48bb4a5336e14854f14b217d9c8110a1e506a319ffff476174d0363b96b8b1'
            'ae2e95db94ef7176207c690224169594d49445e04249d2499e9d2fbc117a0b21'
            '75f99f5239e03238f88d1a834c50043ec32b1dc568f2cc291b07d04718483919'
            'ad6344badc91ad0630caacde83f7f9b97276f80d26a20619a87952be65492c65')
validpgpkeys=(
              'ABAF11C65A2970B130ABE3C479BE3E4300411886' # Linus Torvalds
              '647F28654894E3BD457199BE38DBBDC86092693E' # Greg Kroah-Hartman
             )

_kernelname=${pkgbase#linux}

prepare() {
  cd $_srcname

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

  # Hotfixes
  msg2 "Applying hotfixes"
  patch -p1 -i ../0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch
  patch -p1 -i ../0002-ZEN-Add-CONFIG-for-unprivileged_userns_clone.patch
  patch -p1 -i ../0003-iwlwifi-mvm-disable-TX-AMSDU-on-older-NICs.patch
  patch -p1 -i ../0004-iwlwifi-Add-support-for-SAR-South-Korea-limitation.patch
  patch -p1 -i ../0005-netfilter-nf_tables-fix-module-autoload-for-redir.patch


  # ck hotfixes
  msg2 "Applying ck patch hotfixes"
  patch -p1 -i ../ck_remove-excess-extraversion.patch "$srcdir/linux-ck-patch-5.2-ck1"

  # ck patch
  msg2 "Applying ck patch"
  patch -F 3 -Np1 -i ../linux-ck-patch-${_majver}-${_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 "-$pkgrel" > localversion.10-pkgrel
  echo "$_kernelname" > 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.x86_64 .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.ck.previous

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

build() {
  cd $_srcname
  make bzImage modules
}

_package() {
  pkgdesc="The ${pkgbase/linux/Linux} kernel and modules"
  [[ $pkgbase = linux ]] && groups=(base)
  depends=(coreutils linux-firmware kmod mkinitcpio)
  optdepends=('crda: to set the correct wireless channels of your country')
  backup=("etc/mkinitcpio.d/$pkgbase.preset")
  install=linux.install

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

  cd $_srcname

  msg2 "Installing boot image..."
  install -Dm644 "$(make -s image_name)" "$pkgdir/boot/vmlinuz-$pkgbase"

  msg2 "Installing modules..."
  mkdir -p "$modulesdir"
  make INSTALL_MOD_PATH="$pkgdir/usr" modules_install

  # a place for external modules,
  # with version file for building modules and running depmod from hook
  local extramodules="extramodules$_kernelname"
  local extradir="$pkgdir/usr/lib/modules/$extramodules"
  install -Dt "$extradir" -m644 ../version
  ln -sr "$extradir" "$modulesdir/extramodules"

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

  msg2 "Installing hooks..."
  # sed expression for following substitutions
  local subst="
    s|%PKGBASE%|$pkgbase|g
    s|%KERNVER%|$kernver|g
    s|%EXTRAMODULES%|$extramodules|g
  "

  # hack to allow specifying an initially nonexisting install file
  sed "$subst" "$startdir/$install" > "$startdir/$install.pkg"
  true && install=$install.pkg

  # fill in mkinitcpio preset and pacman hooks
  sed "$subst" ../linux.preset | install -Dm644 /dev/stdin \
    "$pkgdir/etc/mkinitcpio.d/$pkgbase.preset"
  sed "$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 ${pkgbase/linux/Linux} kernel"

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

  cd $_srcname

  msg2 "Installing build files..."
  install -Dt "$builddir" -m644 Makefile .config Module.symvers System.map vmlinux
  install -Dt "$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}

  # ???
  mkdir "$builddir/.tmp_versions"

  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-$pkgver"

  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