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# Contributor: Andrey Alekseev <andrey.android7890@gmail.com>
# used original PKGBUILD from Manjaro linux: https://gitlab.manjaro.org/packages/core/linux58
# https://aur.archlinux.org/packages/linux-xanmod/
# see "PKGBUILD_change.patch" for details


# Maintainer: Philip Müller <philm[at]manjaro[dot]org>
# Maintainer: Bernhard Landauer <bernhard[at]manjaro[dot]org>
# Maintainer: Helmut Stult <helmut[at]manjaro[dot]org>

# Arch credits:
# Tobias Powalowski <tpowa@archlinux.org>
# Thomas Baechler <thomas@archlinux.org>

# Cloud Server
_server=cpx51

pkgbase=linux-manjaro-xanmod
pkgname=("${pkgbase}" "${pkgbase}-headers")
_kernelname=-MANJARO-Xanmod
_basekernel=5.8
_basever=58
_aufs=20200622
pkgver=5.8.6
xanmod=1
pkgrel=1
arch=('x86_64')
url="http://www.kernel.org/"
license=('custom')
makedepends=('bc'
    'docbook-xsl'
    'elfutils'
    'git'
    'inetutils'
    'kmod'
    'xmlto')
options=('!strip')
source=("https://www.kernel.org/pub/linux/kernel/v5.x/linux-${_basekernel}.tar.xz"
        "https://www.kernel.org/pub/linux/kernel/v5.x/patch-${pkgver}.xz"
        "git+https://gitlab.manjaro.org/packages/core/linux58.git"
        # xanmod patch
        "https://github.com/xanmod/linux/releases/download/${pkgver}-xanmod${xanmod}/patch-${pkgver}-xanmod${xanmod}.xz"
        # gcc optimizations
        choose-gcc-optimization.sh
        # the main kernel config files
        'config' 'config.aufs' 'config.anbox'
        # ARCH Patches
        '0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-CLONE_NEWUSER.patch'
        # MANJARO Patches
        '0001-i2c-nuvoton-nc677x-hwmon-driver.patch'
        '0001-iomap-iomap_bmap-should-accept-unwritten-maps.patch'
        '0001-futex.patch'
        '0001-apparmor-patch-to-provide-compatibility-with-v2-net-rules.patch'
        '0002-apparmor-af_unix-mediation.patch'
        '0003-apparmor-fix-use-after-free-in-sk_peer_label.patch'
        '0004-apparmor-fix-apparmor-mediating-locking-non-fs-unix-sockets.patch'

         # Lenovo + AMD
        '0001-lenovo-wmi2.patch'
        '0002-pinctrl-amd.patch'

        # Temp Fixes
        'virtualbox-temp.patch'

        # Bootsplash
        '0001-bootsplash.patch'
        '0002-bootsplash.patch'
        '0003-bootsplash.patch'
        '0004-bootsplash.patch'
        '0005-bootsplash.patch'
        '0006-bootsplash.patch'
        '0007-bootsplash.patch'
        '0008-bootsplash.patch'
        '0009-bootsplash.patch'
        '0010-bootsplash.patch'
        '0011-bootsplash.patch'
        '0012-bootsplash.patch'
        '0013-bootsplash.gitpatch')
sha256sums=('e7f75186aa0642114af8f19d99559937300ca27acaf7451b36d4f9b0f85cf1f5'
            'b4ab9987a715753e64f0aa264dac91c3d7ca0651bfdd8fa5d19c8990f3b08abc'
            'SKIP'
            'SKIP'
            'SKIP'
            '88af7b1e73f8e8d4d7e04da7f41564dbd4431a7f888efa7d12b64df19550141d'
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            'c98893aafd51e83107bb6823cbe3c63ee85c00f439c1facaed3b6ab3c0490e98'
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            'e096b127a5208f56d368d2cb938933454d7200d70c86b763aa22c38e0ddb8717'
            '8c1c880f2caa9c7ae43281a35410203887ea8eae750fe8d360d0c8bf80fcc6e0'
            '1144d51e5eb980fceeec16004f3645ed04a60fac9e0c7cf88a15c5c1e7a4b89e'
            'dd4b69def2efacf4a6c442202ad5cb93d492c03886d7c61de87696e5a83e2846'
            '028b07f0c954f70ca37237b62e04103e81f7c658bb8bd65d7d3c2ace301297dc'
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            '27471eee564ca3149dd271b0817719b5565a9594dc4d884fe3dc51a5f03832bc'
            '60e295601e4fb33d9bf65f198c54c7eb07c0d1e91e2ad1e0dd6cd6e142cb266d'
            '035ea4b2a7621054f4560471f45336b981538a40172d8f17285910d4e0e0b3ef')
prepare() {
  cd "${srcdir}/linux-${_basekernel}"

  # Apply Xanmod patch
  patch -Np1 -i ../patch-${pkgver}-xanmod${xanmod}
  
  # Let's user choose microarchitecture optimization in GCC
  sh ${srcdir}/choose-gcc-optimization.sh $_microarchitecture
  
  # add upstream patch
  msg "add upstream patch"
  patch -p1 -i "${srcdir}/patch-${pkgver}"

  local src
  for src in "${source[@]}"; do
      src="${src%%::*}"
      src="${src##*/}"
      [[ $src = *.patch ]] || continue
      msg2 "Applying patch: $src..."
      patch -Np1 < "../$src"
  done

  msg2 "0013-bootsplash"
  git apply -p1 < "${srcdir}/0013-bootsplash.gitpatch"

  cat "${srcdir}/config" > ./.config

  if [ "${_kernelname}" != "" ]; then
    sed -i "s|CONFIG_LOCALVERSION=.*|CONFIG_LOCALVERSION=\"${_kernelname}\"|g" ./.config
    sed -i "s|CONFIG_LOCALVERSION_AUTO=.*|CONFIG_LOCALVERSION_AUTO=n|" ./.config
  fi

  msg "set extraversion to pkgrel"
  sed -ri "s|^(EXTRAVERSION =).*|\1 -${pkgrel}|" Makefile

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

  msg "get kernel version"
  make prepare

  # load configuration
  # Configure the kernel. Replace the line below with one of your choice.
  #make menuconfig # CLI menu for configuration
  #make nconfig # new CLI menu for configuration
  #make xconfig # X-based configuration
  make oldconfig # using old config from previous kernel version
  # ... or manually edit .config

  msg "rewrite configuration"
  yes "" | make config >/dev/null
}

build() {
  cd "${srcdir}/linux-${_basekernel}"

  msg "build"
  make ${MAKEFLAGS} LOCALVERSION= bzImage modules
}

package_linux-manjaro-xanmod() {
  pkgdesc="The Linux kernel and modules with Xanmod and Manjaro patches"
  depends=('coreutils' 'linux-firmware' 'kmod' 'mkinitcpio>=27')
  optdepends=('crda: to set the correct wireless channels of your country')
  provides=("linux=${pkgver}" VIRTUALBOX-GUEST-MODULES WIREGUARD-MODULE)

  cd "${srcdir}/linux-${_basekernel}"

  KARCH=x86

  # get kernel version
  _kernver="$(make LOCALVERSION= kernelrelease)"

  mkdir -p "${pkgdir}"/{boot,usr/lib/modules}
  make LOCALVERSION= INSTALL_MOD_PATH="${pkgdir}/usr" INSTALL_MOD_STRIP=1 modules_install

  # systemd expects to find the kernel here to allow hibernation
  # https://github.com/systemd/systemd/commit/edda44605f06a41fb86b7ab8128dcf99161d2344
  cp arch/$KARCH/boot/bzImage "${pkgdir}/usr/lib/modules/${_kernver}/vmlinuz"

  # Used by mkinitcpio to name the kernel
  echo "${pkgbase}" | install -Dm644 /dev/stdin "${pkgdir}/usr/lib/modules/${_kernver}/pkgbase"
  echo "${_basekernel}-${CARCH}" | install -Dm644 /dev/stdin "${pkgdir}/usr/lib/modules/${_kernver}/kernelbase"

  # add kernel version
  echo "${pkgver}-${pkgrel}-MANJARO x64" > "${pkgdir}/boot/${pkgbase}-${CARCH}.kver"

  # make room for external modules
  local _extramodules="extramodules-${_basekernel}${_kernelname:--MANJARO}"
  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 "${pkgdir}"/usr/lib/modules/${_kernver}/{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
}

package_linux-manjaro-xanmod-headers() {
  pkgdesc="Header files and scripts for building modules for ${pkgbase} kernel"
  provides=("linux-headers=$pkgver")

  cd "${srcdir}/linux-${_basekernel}"
  local _builddir="${pkgdir}/usr/lib/modules/${_kernver}/build"

  install -Dt "${_builddir}" -m644 Makefile .config Module.symvers
  install -Dt "${_builddir}/kernel" -m644 kernel/Makefile

  mkdir "${_builddir}/.tmp_versions"

  cp -t "${_builddir}" -a include scripts

  install -Dt "${_builddir}/arch/${KARCH}" -m644 "arch/${KARCH}/Makefile"
  install -Dt "${_builddir}/arch/${KARCH}/kernel" -m644 "arch/${KARCH}/kernel/asm-offsets.s"
  #install -Dt "${_builddir}/arch/${KARCH}/kernel" -m644 "arch/${KARCH}/kernel/macros.s"

  cp -t "${_builddir}/arch/${KARCH}" -a "arch/${KARCH}/include"

  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

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

  # copy in Kconfig files
  find . -name Kconfig\* -exec install -Dm644 {} "${_builddir}/{}" \;

  # add objtool for external module building and enabled VALIDATION_STACK option
  install -Dt "${_builddir}/tools/objtool" tools/objtool/objtool

  # remove unneeded architectures
  local _arch
  for _arch in "${_builddir}"/arch/*/; do
    [[ ${_arch} == */x86/ ]] && continue
    rm -r "${_arch}"
  done

  # remove files already in linux-docs package
  rm -r "${_builddir}/Documentation"

  # Fix permissions
  chmod -R u=rwX,go=rX "${_builddir}"

  # strip scripts directory
  local _binary _strip
  while read -rd '' _binary; do
    case "$(file -bi "${_binary}")" in
      *application/x-sharedlib*)  _strip="${STRIP_SHARED}"   ;; # Libraries (.so)
      *application/x-archive*)    _strip="${STRIP_STATIC}"   ;; # Libraries (.a)
      *application/x-executable*) _strip="${STRIP_BINARIES}" ;; # Binaries
      *) continue ;;
    esac
    /usr/bin/strip ${_strip} "${_binary}"
  done < <(find "${_builddir}/scripts" -type f -perm -u+w -print0 2>/dev/null)
}