# Maintainer: Peter Jung ptr1337 <admin@ptr1337.dev>

### BUILD OPTIONS
# Set the next two variables to ANYTHING that is not null to enable them

# NUMA is optimized for multi-socket motherboards.
# A single multi-core CPU actually runs slower with NUMA enabled.
# See, https://bugs.archlinux.org/task/31187
_NUMAdisable=y
#enable winesync
_winesync=y
### Set performance governor as default
_per_gov=
### Running with a 2000 HZ, 1000HZ or 500HZ tick rate
_2k_HZ_ticks=
_1k_HZ_ticks=y
_500_HZ_ticks=
### Enable protect file mappings under memory pressure
_mm_protect=y
### Enable Linux Random Number Generator
#_lrng_enable=y
# Tweak kernel options prior to a build via nconfig
_makenconfig=

# Only compile active modules to VASTLY reduce the number of modules built and
# the build time.
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD reads the database kept if it exists
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
_localmodcfg=

# Use the current kernel's .config file
# Enabling this option will use the .config of the RUNNING kernel rather than
# the ARCH defaults. Useful when the package gets updated and you already went
# through the trouble of customizing your config options.  NOT recommended when
# a new kernel is released, but again, convenient for package bumps.
_use_current=

### IMPORTANT: Do no edit below this line unless you know what you're doing

pkgbase=linux-cacule-rdb
pkgname=("${pkgbase}" "${pkgbase}-headers")
pkgver=5.13.11
pkgrel=2
arch=(x86_64 x86_64_v3)
pkgdesc='Linux Kernel with cacule scheduler and lto compiled'
_gittag=v${pkgver%.*}-${pkgver##*.}
pkgdesc='Linux-CacULE-RDB Kernel by Hamad Marri and with some other patchsets'
url="https://github.com/hamadmarri/cacule-cpu-scheduler"
license=('GPL2')
makedepends=('kmod' 'bc' 'libelf' 'python-sphinx' 'python-sphinx_rtd_theme'
             'graphviz' 'imagemagick' 'pahole' 'cpio' 'perl' 'tar' 'xz')
options=('!strip')
_patchsource="https://raw.githubusercontent.com/ptr1337/linux-cacule-aur/master/patches/5.13"
_caculepatches="https://raw.githubusercontent.com/ptr1337/linux-cacule-aur/master/patches/CacULE"
source=(
"https://cdn.kernel.org/pub/linux/kernel/v${pkgver:0:1}.x/linux-${pkgver}.tar.xz"
"config"
"${_patchsource}/arch-patches-v4/0001-arch-patches.patch"
"${_caculepatches}/v5.13/cacule-5.13.patch"
"${_patchsource}/cpu-patches/0001-cpu-patches.patch"
"${_patchsource}/futex-patches/0001-futex-resync-from-gitlab.collabora.com.patch"
"${_patchsource}/futex2-xanmod-patches-v3/0001-futex2-resync-from-gitlab.collabora.com.patch"
"${_patchsource}/winesync/5.13-winesync.patch"
"${_patchsource}/xanmod-patches-v2/0001-xanmod-patches.patch"
"${_patchsource}/zen-patches/0001-zen-patches.patch"
"${_patchsource}/lqx-patches-v3/0001-lqx-patches.patch"
"${_patchsource}/bfq-patches-v6/0001-bfq-patches.patch"
"${_patchsource}/block-patches-v2/0001-block-patches.patch"
"${_patchsource}/fixes-miscellaneous/0001-fixes-miscellaneous.patch"
"${_patchsource}/bbr2-patches-v2/0001-bbr2-patches.patch"
"${_patchsource}/btrfs-patches-v2/0001-btrfs-patches.patch"
"${_patchsource}/android-patches/0001-android-export-symbold-and-enable-building-ashmem-an.patch"
"${_patchsource}/pf-patches-v9/0001-pf-patches.patch"
"${_patchsource}/lru-patches-v7/0001-lru-patches.patch"
"${_patchsource}/ntfs3-patches-v2/0001-ntfs3-patches.patch"
#"${_patchsource}/lrng-patches/0001-lrng-patches-v2.patch"
"${_patchsource}/security-patches/0001-security-patches.patch"
"${_patchsource}/alsa-patches/0001-alsa-patches.patch"
"${_patchsource}/zstd-upstream-patches/0001-zstd-upstream-patches.patch"
"${_patchsource}/zstd-patches-v5/0001-zstd-patches.patch"
"${_patchsource}/clearlinux-patches-v2/0001-clearlinux-patches.patch"
"${_patchsource}/v4l2loopback-patches-v2/0001-v4l2loopback-patches.patch"
)

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

prepare() {
  cd "${srcdir:?}/linux-${pkgver}" || (
    echo -e "\E[1;31mCan't cd to ${srcdir:?}/linux-${pkgver} directory! Prepare failed! \E[0m"
    exit 1
  )

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

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

    echo "Setting config..."
    cp ../config .config

    make olddefconfig
    ### CPU_ARCH SCRIPT ##
      source "${startdir}"/configure

      cpu_arch
      ### Optionally set tickrate to 2000HZ
        if [ -n "$_2k_HZ_ticks" ]; then
          echo "Setting tick rate to 2k..."
          scripts/config --disable CONFIG_HZ_300
          scripts/config --enable CONFIG_HZ_2000
          scripts/config --set-val CONFIG_HZ 2000
        fi

      ### Optionally set tickrate to 1000
         if [ -n "$_1k_HZ_ticks" ]; then
          echo "Setting tick rate to 1k..."
          scripts/config --disable CONFIG_HZ_300
          scripts/config --enable CONFIG_HZ_1000
          scripts/config --set-val CONFIG_HZ 1000
         fi

      ### Optionally set tickrate to 500HZ
        if [ -n "$_500_HZ_ticks" ]; then
          echo "Setting tick rate to 500HZ..."
          scripts/config --disable CONFIG_HZ_300
          scripts/config --enable CONFIG_HZ_500
          scripts/config --set-val CONFIG_HZ 500
        fi

    ### Optionally disable NUMA for 64-bit kernels only
      # (x86 kernels do not support NUMA)
        if [ -n "$_NUMAdisable" ]; then
          echo "Disabling NUMA from kernel config..."
          scripts/config --disable CONFIG_NUMA
        fi

        if [ -n "$_winesync" ]; then
          echo "Enable winesync support"
          scripts/config --module CONFIG_WINESYNC
        fi

    ### Set performance governor
        if [ -n "$_per_gov" ]; then
          echo "Setting performance governor..."
          scripts/config --disable CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL
          scripts/config --enable CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
          echo "Disabling uneeded governors..."
          scripts/config --enable CONFIG_CPU_FREQ_GOV_ONDEMAND
          scripts/config --disable CONFIG_CPU_FREQ_GOV_CONSERVATIVE
          scripts/config --disable CONFIG_CPU_FREQ_GOV_USERSPACE
          scripts/config --disable CONFIG_CPU_FREQ_GOV_SCHEDUTIL
        fi

      ### Enable protect file mappings under memory pressure
          if [ -n "$_mm_protect" ]; then
            echo "Enabling protect file mappings under memory pressure..."
            scripts/config --enable CONFIG_UNEVICTABLE_FILE
            scripts/config --set-val CONFIG_UNEVICTABLE_FILE_KBYTES_LOW 262144
            scripts/config --set-val CONFIG_UNEVICTABLE_FILE_KBYTES_MIN 131072
            scripts/config --enable CONFIG_UNEVICTABLE_ANON
            scripts/config --set-val CONFIG_UNEVICTABLE_ANON_KBYTES_LOW 65536
            scripts/config --set-val CONFIG_UNEVICTABLE_ANON_KBYTES_MIN 32768
          fi

          echo "Enable Anbox"
          scripts/config --module  CONFIG_ASHMEM
          scripts/config --enable  CONFIG_ANDROID_BINDER_IPC_SELFTEST
          scripts/config --enable  CONFIG_ANDROID
          scripts/config --enable  CONFIG_ANDROID_BINDER_IPC
          scripts/config --enable  CONFIG_ANDROID_BINDERFS
          scripts/config --set-str CONFIG_ANDROID_BINDER_DEVICES binder,hwbinder,vndbinder
          echo "Disabling TCP_CONG_CUBIC..."
          scripts/config --module CONFIG_TCP_CONG_CUBIC
          scripts/config --disable CONFIG_DEFAULT_CUBIC
          echo "Enabling TCP_CONG_BBR2..."
          scripts/config --enable CONFIG_TCP_CONG_BBR2
          scripts/config --enable CONFIG_DEFAULT_BBR2
          scripts/config --set-str CONFIG_DEFAULT_TCP_CONG bbr2
          echo "Enable VHBA-Module"
          scripts/config --module CONFIG_VHBA

    ### Optionally use running kernel's config
    # code originally by nous; http://aur.archlinux.org/packages.php?ID=40191
    if [ -n "$_use_current" ]; then
        if [[ -s /proc/config.gz ]]; then
            echo "Extracting config from /proc/config.gz..."
            # modprobe configs
            zcat /proc/config.gz > ./.config
        else
            warning "Your kernel was not compiled with IKCONFIG_PROC!"
            warning "You cannot read the current config!"
            warning "Aborting!"
            exit
        fi
    fi

    ### Optionally load needed modules for the make localmodconfig
    # See https://aur.archlinux.org/packages/modprobed-db
    if [ -n "$_localmodcfg" ]; then
        if [ -e $HOME/.config/modprobed.db ]; then
            echo "Running Steven Rostedt's make localmodconfig now"
            make LSMOD=$HOME/.config/modprobed.db localmodconfig
        else
            echo "No modprobed.db data found"
            exit
        fi
    fi

    make -s kernelrelease > version
    echo "Prepared $pkgbase version $(<version)"

    [[ -z "$_makenconfig" ]] || make nconfig

    ### Save configuration for later reuse
    cp -Tf ./.config "${startdir}/config-${pkgver}-${pkgrel}${pkgbase#linux}"
}

build() {
  cd "${srcdir:?}/linux-${pkgver}" || (
    echo -e "\E[1;31mCan't cd to ${srcdir:?}/linux-${pkgver} directory! Build failed! \E[0m"
    exit 1
  )
    make all
}

package_linux-cacule-rdb() {
  pkgdesc="The ${pkgdesc} 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')
  provides=(VIRTUALBOX-GUEST-MODULES WIREGUARD-MODULE)
  replaces=(virtualbox-guest-modules-arch wireguard-arch)

  cd "${srcdir:?}/linux-${pkgver}" || (
    echo -e "\E[1;31mCan't cd to ${srcdir:?}/linux-${pkgver} directory! Package linux kernel failed! \E[0m"
    exit 1
  )

  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" INSTALL_MOD_STRIP=1 modules_install

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

}

package_linux-cacule-rdb-headers() {

  pkgdesc="Headers and scripts for building modules for the ${pkgdesc}"
  depends=("linux-cacule-rdb=${pkgver}" pahole)

  cd "${srcdir:?}/linux-${pkgver}" || (
    echo -e "\E[1;31mCan't cd to ${srcdir:?}/linux-${pkgver} directory! Package linux headers failed! \E[0m"
    exit 1
  )

  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
  install -Dt "${builddir}/tools/objtool" tools/objtool/objtool

  # 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

  # https://bugs.archlinux.org/task/13146
  install -Dt "${builddir}/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h

  # https://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

  # https://bugs.archlinux.org/task/71392
  install -Dt "${builddir}/drivers/iio/common/hid-sensors" -m644 drivers/iio/common/hid-sensors/*.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 "Stripping vmlinux..."
  strip -v "${STRIP_STATIC}" "${builddir}/vmlinux"

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

}

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