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# Maintainer: Piotr Gorski <lucjan.lucjanov@gmail.com>
# Contributor: Tobias Powalowski <tpowa@archlinux.org>
# Contributor: Thomas Baechler <thomas@archlinux.org>
# Contributor:  Timofey Titovets <nefelim4ag@gmail.com>

### BUILD OPTIONS
# Set these variables to ANYTHING that is not null to enable them

### Tweak kernel options prior to a build via nconfig
_makenconfig=

### Tweak kernel options prior to a build via menuconfig
_makemenuconfig=

### Tweak kernel options prior to a build via xconfig
_makexconfig=

### Tweak kernel options prior to a build via gconfig
_makegconfig=

# 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

# Compile ONLY probed modules
# As of mainline 2.6.32, running with this option will only build the modules
# that you currently have probed in your system VASTLY reducing the number of
# modules built and the build time to do it.
#
# WARNING - ALL modules must be probed or loaded via a config file BEFORE you
# begin making the pkg unless you're running modprobed-db (AUR) and building
# this with makepkg as the user who is keeping the database.
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db script a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD will call it directly to probe all the modules you have logged!
#
# 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=

### Running with a 1000 HZ tick rate
_1k_HZ_ticks=

### Do not edit below this line unless you know what you're doing

pkgbase=linux-next-git
pkgver=20181114.r0.g0bc80e3cb0c1
_srcname=linux-next
pkgrel=1
arch=('x86_64')
url="http://www.kernel.org/"
license=('GPL2')
options=('!strip')
makedepends=('kmod' 'inetutils' 'bc' 'libelf' 'python-sphinx' 'graphviz')

source=("git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git"
         # the main kernel config files
        'config'
         # pacman hook for depmod
        '60-linux.hook'
         # pacman hook for initramfs regeneration
        '90-linux.hook'
         # pacman hook for remove initramfs
        '99-linux.hook'
         # standard config files for mkinitcpio ramdisk
        'linux.preset')

_kernelname=${pkgbase#linux}
: ${_kernelname:=-next}

pkgver() {
  cd "${_srcname}"
  git describe --long --tags |  sed -E 's/next.//;s/([^-]*-g)/r\1/;s/-/./g;s/\.rc/rc/'
}

prepare() {
    cd ${_srcname}

    ### Setting version
        msg2 "Setting version..."
        scripts/setlocalversion --save-scmversion
        echo "-$pkgrel" > localversion.10-pkgrel
        echo "$_kernelname" > localversion.20-pkgname

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

    ### Setting config
        msg2 "Setting config..."
        cp ../config .config
        make olddefconfig

    ### Prepared version
        make -s kernelrelease > ../version
        msg2 "Prepared %s version %s" "$pkgbase" "$(<../version)"

    ### 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
			msg2 "Extracting config from /proc/config.gz..."
			# modprobe configs
			zcat /proc/config.gz > ./.config
		else
			warning "You kernel was not compiled with IKCONFIG_PROC!"
			warning "You cannot read the current config!"
			warning "Aborting!"
			exit
		fi
	fi    

	
    ### Optionally set tickrate to 1000
	if [ -n "$_1k_HZ_ticks" ]; then
		msg2 "Setting tick rate to 1k..."
		sed -i -e 's/^CONFIG_HZ_300=y/# CONFIG_HZ_300 is not set/' \
                    -i -e 's/^# CONFIG_HZ_1000 is not set/CONFIG_HZ_1000=y/' \
                    -i -e 's/^CONFIG_HZ=300/CONFIG_HZ=1000/' ./.config
	fi
	
    ### Optionally disable NUMA for 64-bit kernels only
        # (x86 kernels do not support NUMA)
        if [ -n "$_NUMAdisable" ]; then
            msg2 "Disabling NUMA from kernel config..."
            sed -i -e 's/CONFIG_NUMA=y/# CONFIG_NUMA is not set/' \
                -i -e '/CONFIG_AMD_NUMA=y/d' \
                -i -e '/CONFIG_X86_64_ACPI_NUMA=y/d' \
                -i -e '/CONFIG_NODES_SPAN_OTHER_NODES=y/d' \
                -i -e '/# CONFIG_NUMA_EMU is not set/d' \
                -i -e '/CONFIG_NODES_SHIFT=6/d' \
                -i -e '/CONFIG_NEED_MULTIPLE_NODES=y/d' \
                -i -e '/# CONFIG_MOVABLE_NODE is not set/d' \
                -i -e '/CONFIG_USE_PERCPU_NUMA_NODE_ID=y/d' \
                -i -e '/CONFIG_ACPI_NUMA=y/d' ./.config
        fi

    ### Optionally load needed modules for the make localmodconfig
        # See https://aur.archlinux.org/packages/modprobed-db
        if [ -n "$_localmodcfg" ]; then
            if [ -f $HOME/.config/modprobed.db ]; then
            msg2 "Found a modprobed-db database for Steven Rostedt's make localmodconfig"
            make LSMOD=$HOME/.config/modprobed.db localmodconfig
        else
            msg2 "Running Steven Rostedt's make localmodconfig now"
            make localmodconfig
            fi
        fi

    ### Running make nconfig
	
	[[ -z "$_makenconfig" ]] ||  make nconfig
	
    ### Running make menuconfig
	
	[[ -z "$_makemenuconfig" ]] || make menuconfig
	
    ### Running make xconfig
	
	[[ -z "$_makexconfig" ]] || make xconfig
	
    ### Running make gconfig
	
	[[ -z "$_makegconfig" ]] || make gconfig

    ### Save configuration for later reuse
	cat .config > "${startdir}/config.last"
}

build() {
  cd ${_srcname}

  make bzImage modules htmldocs
}

_package() {
    pkgdesc="The ${pkgbase/linux/Linux} kernel and modules"
    depends=('coreutils' 'linux-firmware' 'mkinitcpio>=0.7')
    optdepends=('crda: to set the correct wireless channels of your country' 'modprobed-db: Keeps track of EVERY kernel module that has ever been probed - useful for those of us who make localmodconfig')
    backup=("etc/mkinitcpio.d/$pkgbase.preset")
    install=linux.install

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

  cd $_srcname

  msg2 "Installing boot image..."
  # 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"
  install -Dm644 "$modulesdir/vmlinuz" "$pkgdir/boot/vmlinuz-$pkgbase"

  msg2 "Installing modules..."
  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-${pkgbase}.hook"
  sed "$subst" ../99-linux.hook | install -Dm644 /dev/stdin \
    "$pkgdir/usr/share/libalpm/hooks/99-${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"
   depends=('linux-uksm')

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

  # 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"
}


_package-docs() {
    pkgdesc="Kernel hackers manual - HTML documentation that comes with the ${pkgbase/linux/Linux} kernel"
    depends=('linux-uksm')

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

  cd $_srcname

  msg2 "Installing documentation..."
  mkdir -p "$builddir"
  cp -t "$builddir" -a Documentation

  msg2 "Removing doctrees..."
  rm -r "$builddir/Documentation/output/.doctrees"

  msg2 "Moving HTML docs..."
  local src dst
  while read -rd '' src; do
    dst="$builddir/Documentation/${src#$builddir/Documentation/output/}"
    mkdir -p "${dst%/*}"
    mv "$src" "$dst"
    rmdir -p --ignore-fail-on-non-empty "${src%/*}"
  done < <(find "$builddir/Documentation/output" -type f -print0)

  msg2 "Adding symlink..."
  mkdir -p "$pkgdir/usr/share/doc"
  ln -sr "$builddir/Documentation" "$pkgdir/usr/share/doc/$pkgbase"

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


pkgname=("$pkgbase" "$pkgbase-headers" "$pkgbase-docs")
for _p in "${pkgname[@]}"; do
  eval "package_$_p() {
    $(declare -f "_package${_p#$pkgbase}")
    _package${_p#$pkgbase}
  }"
done

sha512sums=('SKIP'
            '103d018daa010b0791e6d11018656e67d60e86f5322f4e8ca2196b946a6f7b73dfde9a7ced340a6cae520b5ebdd515cced8b161d1d91bb35efabca7fdecee9c0'
            '7ad5be75ee422dda3b80edd2eb614d8a9181e2c8228cd68b3881e2fb95953bf2dea6cbe7900ce1013c9de89b2802574b7b24869fc5d7a95d3cc3112c4d27063a'
            '2718b58dbbb15063bacb2bde6489e5b3c59afac4c0e0435b97fe720d42c711b6bcba926f67a8687878bd51373c9cf3adb1915a11666d79ccb220bf36e0788ab7'
            'b27d13a1e486de6a8500724d2aea3fc11b2f46698e6aa5e41b37b8c8bbf973763b3c5eca464522ea198305167bace2a20ce4d1c40b01ce6f82838c81f3135f48'
            '2dc6b0ba8f7dbf19d2446c5c5f1823587de89f4e28e9595937dd51a87755099656f2acec50e3e2546ea633ad1bfd1c722e0c2b91eef1d609103d8abdc0a7cbaf')