# Based on the file created for Arch Linux by:
# Tobias Powalowski <tpowa@archlinux.org>
# Thomas Baechler <thomas@archlinux.org>

# Contributor: Tk-Glitch <ti3nou at gmail dot com>

plain '       .---.`               `.---.'
plain '    `/syhhhyso-           -osyhhhys/`'
plain '   .syNMdhNNhss/``.---.``/sshNNhdMNys.'
plain '   +sdMh.`+MNsssssssssssssssNM+`.hMds+'
plain '   :syNNdhNNhssssssssssssssshNNhdNNys:'
plain '    /ssyhhhysssssssssssssssssyhhhyss/'
plain '    .ossssssssssssssssssssssssssssso.'
plain '   :sssssssssssssssssssssssssssssssss:'
plain '  /sssssssssssssssssssssssssssssssssss/'
plain ' :sssssssssssssoosssssssoosssssssssssss:'
plain ' osssssssssssssoosssssssoossssssssssssso'
plain ' osssssssssssyyyyhhhhhhhyyyyssssssssssso'
plain ' /yyyyyyhhdmmmmNNNNNNNNNNNmmmmdhhyyyyyy/'
plain '  smmmNNNNNNNNNNNNNNNNNNNNNNNNNNNNNmmms'
plain '   /dNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNd/'
plain '    `:sdNNNNNNNNNNNNNNNNNNNNNNNNNds:`'
plain '       `-+shdNNNNNNNNNNNNNNNdhs+-`'
plain '             `.-:///////:-.`'

_where="$PWD" # track basedir as different Arch based distros are moving srcdir around

cp "$_where"/linux54-tkg-patches/* "$_where" # copy patches inside the PKGBUILD's dir to preserve makepkg sourcing and md5sum checking
cp "$_where"/linux54-tkg-config/* "$_where" # copy config files and hooks inside the PKGBUILD's dir to preserve makepkg sourcing and md5sum checking

source "$_where"/customization.cfg # load default configuration from file

# Load external configuration file if present. Available variable values will overwrite customization.cfg ones.
if [ -e "$_EXT_CONFIG_PATH" ]; then
  source "$_EXT_CONFIG_PATH" && msg2 "External configuration file $_EXT_CONFIG_PATH will be used to override customization.cfg values." && msg2 ""
fi

if [ -z "$_OPTIPROFILE" ] && [ ! -e "$_where"/cpuschedset ]; then
  # Prompt about optimized configurations. Available variable values will overwrite customization.cfg/external config ones.
  plain "Do you want to use a predefined optimized profile?"
  read -rp "`echo $'  > 1.Custom\n    2.Ryzen Desktop (Performance)\n    3.Other Desktop (Performance)\nchoice[1-3?]: '`" _OPTIPROFILE;
fi
if [ "$_OPTIPROFILE" == "2" ]; then
  source "$_where"/ryzen-desktop-profile.cfg && msg2 "Ryzen Desktop (Performance) profile will be used." && msg2 ""
elif [ "$_OPTIPROFILE" == "3" ]; then
  source "$_where"/generic-desktop-profile.cfg && msg2 "Generic Desktop (Performance) profile will be used." && msg2 ""
fi

# source cpuschedset early if present
if [ -e "$_where"/cpuschedset ]; then
  source "$_where"/cpuschedset
fi

# CPU SCHED selector
if [ -z "$_cpusched" ] && [ ! -e "$_where"/cpuschedset ]; then
  plain "What CPU sched variant do you want to build/install?"
  read -rp "`echo $'  > 1.PDS\n    2.MuQSS\n    3.BMQ\n    4.CFS\nchoice[1-4?]: '`" CONDITION;
  if [ "$CONDITION" == "2" ]; then
    echo "_cpusched=\"MuQSS\"" > "$_where"/cpuschedset
  elif [ "$CONDITION" == "3" ]; then
    echo "_cpusched=\"bmq\"" > "$_where"/cpuschedset
  elif [ "$CONDITION" == "4" ]; then
    echo "_cpusched=\"cfs\"" > "$_where"/cpuschedset
  else
    echo "_cpusched=\"pds\"" > "$_where"/cpuschedset
  fi
  if [ -n "$_custom_pkgbase" ]; then
    echo "_custom_pkgbase=\"${_custom_pkgbase}\"" >> "$_where"/cpuschedset
  fi
elif [ "$_cpusched" == "muqss" ] || [ "$_cpusched" == "MuQSS" ]; then
  echo "_cpusched=\"MuQSS\"" > "$_where"/cpuschedset
elif [ "$_cpusched" == "pds" ]; then
  echo "_cpusched=\"pds\"" > "$_where"/cpuschedset
elif [ "$_cpusched" == "bmq" ]; then
  echo "_cpusched=\"bmq\"" > "$_where"/cpuschedset
else
  if [ "$_nofallback" != "true" ]; then
    warning "Something is wrong with your cpusched selection. Do you want to fallback to CFS (default)?"
    read -rp "`echo $'    > N/y : '`" _fallback;
  fi
  if [[ "$_fallback" =~ [yY] ]] || [ "$_nofallback" == "true" ]; then
    echo "_cpusched=\"cfs\"" > "$_where"/cpuschedset
  else
    error "Exiting..."
    exit 1
  fi
fi

source "$_where"/cpuschedset

_basever=54
if [ -n "$_custom_pkgbase" ]; then
  pkgbase="${_custom_pkgbase}"
else
  pkgbase=linux"${_basever}"-tkg-"${_cpusched}"
fi
pkgname=("${pkgbase}" "${pkgbase}-headers")
_basekernel=5.4
_sub=59
pkgver="${_basekernel}"."${_sub}"
pkgrel=78
pkgdesc='Linux-tkg'
arch=('x86_64') # no i686 in here
url="http://www.kernel.org/"
license=('GPL2')
makedepends=('xmlto' 'docbook-xsl' 'kmod' 'inetutils' 'bc' 'libelf' 'patchutils' 'flex' 'python-sphinx' 'python-sphinx_rtd_theme' 'graphviz' 'imagemagick' 'git')
optdepends=('schedtool')
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"
        "https://raw.githubusercontent.com/graysky2/kernel_gcc_patch/master/enable_additional_cpu_optimizations_for_gcc_v10.1%2B_kernel_v4.19-v5.4.patch"
        'config.x86_64' # stock Arch config
        'config_hardened.x86_64' # hardened Arch config
        90-cleanup.hook
        cleanup
        # ARCH Patches
        0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch
        # TkG
        0002-clear-patches.patch
        0003-glitched-base.patch
        0003-glitched-cfs.patch
        0004-glitched-ondemand-muqss.patch
        0004-glitched-muqss.patch
        0004-5.4-ck1.patch
        0005-glitched-ondemand-pds.patch
        0005-glitched-pds.patch
        0005-v5.4_undead-pds099o.patch
        0006-add-acs-overrides_iommu.patch
        0007-v5.4-fsync.patch
        #0008-5.4-bcachefs.patch
        0009-glitched-bmq.patch
        0009-bmq_v5.4-r2.patch
        0011-ZFS-fix.patch
        0012-linux-hardened.patch
)
sha256sums=('bf338980b1670bca287f9994b7441c2361907635879169c64ae78364efc5f491'
            '171f4828e0b80e808f455235eeb2e816d4c8445b48e6773609c7f6ea491c9d8b'
            '27b7fc535ade94b636c3ec4e809e141831e9465a0ef55215a9852b87048629e2'
            '55dd5117c1da17c9ec38d7bc995958958bcc8b7ebcfd81de1d4c7650b85537ab'
            '1f4a20d6eaaa0d969af93152a65191492400c6aa838fc1c290b0dd29bb6019d8'
            '1e15fc2ef3fa770217ecc63a220e5df2ddbcf3295eb4a021171e7edd4c6cc898'
            '66a03c246037451a77b4d448565b1d7e9368270c7d02872fbd0b5d024ed0a997'
            '31dc68e84aecfb7d069efb1305049122c65694676be8b955634abcf0675922a2'
            'd02bf5ca08fd610394b9d3a0c3b176d74af206f897dee826e5cbaec97bb4a4aa'
            '156a2c75fd228920e3c3da5e04a110afa403951bdfbb85772c2fd4b82fd24d61'
            '7058e57fd68367b029adc77f2a82928f1433daaf02c8c279cb2d13556c8804d7'
            'c605f638d74c61861ebdc36ebd4cb8b6475eae2f6273e1ccb2bbb3e10a2ec3fe'
            'bc69d6e5ee8172b0242c8fa72d13cfe2b8d2b6601468836908a7dfe8b78a3bbb'
            '6f69af16c82ce751a873d590af65735664ba8121369face03da48507ce803a5b'
            '62496f9ca788996181ef145f96ad26291282fcc3fb95cdc04080dcf84365be33'
            'eac7e5d6201528e64f4bdf5e286c842511e1afc52e1518dc8e7d11932bbe0a99'
            'db03fbd179ec78941eefe1c0edde4c19071bc603511d0b5c06c04e412994b62e'
            '19661ec0d39f9663452b34433214c755179894528bf73a42f6ba52ccf572832a'
            '2d9260b80b43bbd605cf420d6bd53aa7262103dfd77196ba590ece5600b6dc0d'
            '3832f828a9f402b153fc9a6829c5a4eaf6091804bcda3a0423c8e1b57e26420d'
            '6a6a736cf1b3513d108bfd36f60baf50bb36b33aec21ab0d0ffad13602b7ff75'
            '49262ce4a8089fa70275aad742fc914baa28d9c384f710c9a62f64796d13e104'
            'aeb31404c26ee898d007b1f66cb9572c9884ad8eca14edc4587d68f6cba6de46')

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

prepare() {
  rm -rf $pkgdir # Nuke the entire pkg folder so it'll get regenerated clean on next build

  ln -s "${_where}/customization.cfg" "${srcdir}" # workaround

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

  source "$_where/linux$_basever-tkg-config/prepare"
  _tkg_srcprep
}

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

  # Use custom compiler paths if defined
  if [ -n "${CUSTOM_GCC_PATH}" ]; then
    PATH=${CUSTOM_GCC_PATH}/bin:${CUSTOM_GCC_PATH}/lib:${CUSTOM_GCC_PATH}/include:${PATH}
  fi

  if [ "$_force_all_threads" == "true" ]; then
    _force_all_threads=-j$(nproc)
  else
    _force_all_threads=${MAKEFLAGS}
  fi

  # ccache
  if [ "$_noccache" != "true" ] && pacman -Qq ccache &> /dev/null; then
    export PATH="/usr/lib/ccache/bin/:$PATH"
    export CCACHE_SLOPPINESS="file_macro,locale,time_macros"
    export CCACHE_NOHASHDIR="true"
    msg2 'ccache was found and will be used'
  fi

  # build!
  _runtime=$( time ( schedtool -B -n 1 -e ionice -n 1 make $_force_all_threads LOCALVERSION= bzImage modules 2>&1 ) 3>&1 1>&2 2>&3 ) || _runtime=$( time ( make $_force_all_threads LOCALVERSION= bzImage modules 2>&1 ) 3>&1 1>&2 2>&3 )
}

hackbase() {
  pkgdesc="The $pkgdesc kernel and modules"
  depends=('coreutils' 'kmod' 'initramfs')
  optdepends=('linux-docs: Kernel hackers manual - HTML documentation that comes with the Linux kernel.'
              'crda: to set the correct wireless channels of your country.'
              'linux-firmware: Firmware files for Linux'
              'modprobed-db: Keeps track of EVERY kernel module that has ever been probed. Useful for make localmodconfig.'
              'nvidia-tkg: NVIDIA drivers for all installed kernels - non-dkms version.'
              'nvidia-dkms-tkg: NVIDIA drivers for all installed kernels - dkms version.'
              'update-grub: Simple wrapper around grub-mkconfig.')
  provides=("linux=${pkgver}" "${pkgbase}")

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

  # get kernel version
  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}

  # install cleanup pacman hook and script
  sed -e "s|cleanup|${pkgbase}-cleanup|g" "${srcdir}"/90-cleanup.hook |
    install -Dm644 /dev/stdin "${pkgdir}/usr/share/libalpm/hooks/90-${pkgbase}.hook"
  install -Dm755 "${srcdir}"/cleanup "${pkgdir}/usr/share/libalpm/scripts/${pkgbase}-cleanup"

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

hackheaders() {
  pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
  provides=("linux-headers=${pkgver}" "${pkgbase}-headers=${pkgver}")

  cd "${srcdir}/linux-${_basekernel}"
  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
  install -Dt "$builddir/tools/objtool" tools/objtool/objtool

  # 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"

  if [ $_NUKR == "true" ]; then
    rm -rf "$srcdir" # Nuke the entire src folder so it'll get regenerated clean on next build
  fi
}

source /dev/stdin <<EOF
package_${pkgbase}() {
hackbase
}

package_${pkgbase}-headers() {
hackheaders
}
EOF

function exit_cleanup {
  # Remove state tracker
  rm -f "$_where"/cpuschedset
  
  # Remove temporarily copied files
  rm -rf "$_where"/*.patch
  rm -rf "$_where"/*-profile.cfg
  rm -f "$_where"/config*
  rm -f "$_where"/*.hook
  rm -f "$_where"/cleanup
  rm -f "$_where"/prepare

  # Community patches removal in case of failure
  for _p in ${_community_patches[@]}; do
    rm -f "$_where"/"$_p"
  done

  if [ "$_NUKR" == "true" ]; then
    rm -rf "$_where"/src/*
    # Double tap
    rm -rf "$srcdir"/linux-*
    rm -rf "$srcdir"/*.xz
    rm -rf "$srcdir"/*.patch
    rm -rf "$srcdir"/*-profile.cfg
    rm -f "$srcdir"/config.x86_64
    rm -f "$srcdir"/customization.cfg
  else
    # Meh
    rm -rf "$srcdir"/linux-${_basekernel}/Documentation/filesystems/aufs/*
    rm -f "$srcdir"/linux-${_basekernel}/Documentation/ABI/testing/*-aufs
    rm -rf "$srcdir"/linux-${_basekernel}/fs/aufs/*
    rm -f "$srcdir"/linux-${_basekernel}/include/uapi/linux/aufs*

    rm -f "$srcdir"/linux-${_basekernel}/mm/prfile.c

    rm -f "$srcdir"/linux-${_basekernel}/block/bfq*
    rm -f "$srcdir"/linux-${_basekernel}/Documentation/tp_smapi.txt

    rm -f "$srcdir"/linux-${_basekernel}/drivers/platform/x86/thinkpad_ec.c
    rm -f "$srcdir"/linux-${_basekernel}/include/linux/thinkpad_ec.h
    rm -f "$srcdir"/linux-${_basekernel}/drivers/platform/x86/tp_smapi.c

    rm -rf "$srcdir"/linux-${_basekernel}/drivers/scsi/vhba/*

    rm -rf "$srcdir"/linux-${_basekernel}/fs/exfat/*
    rm -f "$srcdir"/linux-${_basekernel}/include/trace/events/fs.h

    rm -f "$srcdir"/linux-${_basekernel}/Documentation/scheduler/sched-PDS-mq.txt
    rm -f "$srcdir"/linux-${_basekernel}/include/linux/skip_list.h
    rm -f "$srcdir"/linux-${_basekernel}/kernel/sched/pds.c
    rm -f "$srcdir"/linux-${_basekernel}/kernel/sched/pds_sched.h

    rm -f "$srcdir"/linux-${_basekernel}/Documentation/scheduler/sched-BMQ.txt
    rm -f "$srcdir"/linux-${_basekernel}/kernel/sched/bmq.c
    rm -f "$srcdir"/linux-${_basekernel}/kernel/sched/bmq_sched.h

    rm -f "$srcdir"/linux-${_basekernel}/Documentation/scheduler/sched-BFS.txt
    rm -f "$srcdir"/linux-${_basekernel}/Documentation/scheduler/sched-MuQSS.txt
    rm -rf "$srcdir"/linux-${_basekernel}/arch/blackfin/*
    rm -f "$srcdir"/linux-${_basekernel}/arch/powerpc/configs/c2k_defconfig
    rm -f "$srcdir"/linux-${_basekernel}/arch/score/configs/spct6600_defconfig
    rm -f "$srcdir"/linux-${_basekernel}/arch/tile/configs/tilegx_defconfig
    rm -f "$srcdir"/linux-${_basekernel}/arch/tile/configs/tilepro_defconfig
    rm -f "$srcdir"/linux-${_basekernel}/drivers/staging/lustre/lnet/lnet/lib-eq.c
    rm -f "$srcdir"/linux-${_basekernel}/kernel/sched/MuQSS*
    rm -f "$srcdir"/linux-${_basekernel}/kernel/skip_list.c

    rm -f "$srcdir"/linux-${_basekernel}/Documentation/vm/uksm.txt
    rm -f "$srcdir"/linux-${_basekernel}/include/linux/sradix-tree.h
    rm -f "$srcdir"/linux-${_basekernel}/include/linux/uksm.h
    rm -f "$srcdir"/linux-${_basekernel}/lib/sradix-tree.c
    rm -f "$srcdir"/linux-${_basekernel}/mm/uksm.c
  fi

  remove_deps

  msg2 'exit cleanup done\n'
  if [ -n "$_runtime" ]; then
    msg2 "compilation time : \n$_runtime"
  fi
}

trap exit_cleanup EXIT