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# Maintainer: David P. <megver83@parabola.nu>
# Contributor: André Silva <emulatorman@hyperbola.info>
# Contributor: Márcio Silva <coadde@hyperbola.info>
# Contributor: Nicolás Reynolds <fauno@kiwwwi.com.ar>
# Contributor: Sorin-Mihai Vârgolici <smv@yobicore.org>
# Contributor: Michał Masłowski <mtjm@mtjm.eu>
# Contributor: Luke Shumaker <lukeshu@sbcglobal.net>
# Contributor: Luke R. <g4jc@openmailbox.org>

# Based on linux-zen package

pkgbase=linux-libre-pck
_srcbasever=4.18-gnu
_srcver=4.18.9-gnu
_pckver=pck1

_replacesarchkernel=('linux-zen')
_replacesoldkernels=()
_replacesoldmodules=()

_srcname=linux-${_srcbasever%-*}
_archpkgver=${_srcver%-*}
pkgver=${_srcver//-/.${_pckver}_}
pkgrel=1
arch=(i686 x86_64 armv7h)
url="https://wiki.parabola.nu/PCK"
license=(GPL2)
makedepends=(xmlto kmod inetutils bc libelf python-sphinx graphviz)
options=('!strip')
source=(
  "https://linux-libre.fsfla.org/pub/linux-libre/releases/$_srcbasever/linux-libre-$_srcbasever.tar.xz"{,.sign}
  "https://linux-libre.fsfla.org/pub/linux-libre/releases/$_srcver/patch-$_srcbasever-$_srcver.xz"{,.sign}
  "https://repo.parabola.nu/other/pck/patches/$_srcver/patch-$_srcver-$_pckver.patch"{,.sig}
  # the main kernel config files
  'config.i686' 'config.x86_64' 'config.armv7h'
  # pacman hooks for depmod and initramfs regeneration
  '60-linux.hook' '90-linux.hook'
  # standard config files for mkinitcpio ramdisk
  'linux.preset'
)
validpgpkeys=(
  '474402C8C582DAFBE389C427BCB7CF877E7D47A7' # Alexandre Oliva
  '6DB9C4B4F0D8C0DC432CF6E4227CA7C556B2BA78' # David P.
)
sha512sums=('0c221c6e84eb5bc270ef79454bf407079daed84534afb1d449d40fa46e42868a471d3063016a4eb3f68d42879e18ee314ab30716116805fee35b5084b23df2a9'
            'SKIP'
            '72486a515539b2420daa6fb41c41f5994dbc4572bdacd80f75fb965398b6e12ed06c491ddab263adc36c5d48da52e1b5cf1145f4f808665dffc64ba16bfc90d4'
            'SKIP'
            '820b2e4d6e13152817674870b787af62425d2bdb9d2555b82334238b48500f7e0201a2ddc01f6db2a34008a5ba241f548cffe751876069cc7ff1ff986f6d05ab'
            'SKIP'
            '8a10ff5806923acf49fa286a8060b892767398a3da5b7b8ff12a9904e6576e23d346519ef5dfaa1cd7e8c8fdb3a8e573968d30343e025362dd6b7fb2c72fec3c'
            '7279a753afbbc7eedb5a5d4d98ed6300ef1014ae4666367a3a1040c6bd45c13c84bc187f90f9b04c9a32d6b6032319b42bf48dc650522c2fde1262891a121941'
            'a786de70e1e7106e26bec8afd67bc6a18c6124c6e3bfa9f7d1a794f1b0bce9b095e1806e79583a8c4f2e90424370fdafba77bed93215e62239fb4eda5dae257a'
            '7ad5be75ee422dda3b80edd2eb614d8a9181e2c8228cd68b3881e2fb95953bf2dea6cbe7900ce1013c9de89b2802574b7b24869fc5d7a95d3cc3112c4d27063a'
            '4a8b324aee4cccf3a512ad04ce1a272d14e5b05c8de90feb82075f55ea3845948d817e1b0c6f298f5816834ddd3e5ce0a0e2619866289f3c1ab8fd2f35f04f44'
            '2dc6b0ba8f7dbf19d2446c5c5f1823587de89f4e28e9595937dd51a87755099656f2acec50e3e2546ea633ad1bfd1c722e0c2b91eef1d609103d8abdc0a7cbaf')

_kernelname=${pkgbase#linux-libre}
_replacesarchkernel=("${_replacesarchkernel[@]/\%/${_kernelname}}")
_replacesoldkernels=("${_replacesoldkernels[@]/\%/${_kernelname}}")
_replacesoldmodules=("${_replacesoldmodules[@]/\%/${_kernelname}}")

case "$CARCH" in
  i686|x86_64) KARCH=x86;;
  armv7h) KARCH=arm;;
esac

prepare() {
  cd $_srcname

  # add upstream patch
  if [ "$_srcbasever" != "$_srcver" ]; then
    patch -p1 -i ../patch-$_srcbasever-$_srcver
  fi

  # add PCK patch
  patch -p1 -i ../patch-$_srcver-$_pckver.patch

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

  msg2 "Setting config..."
  cp ../config.$CARCH .config
  make olddefconfig

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

build() {
  cd $_srcname
  if [ "$CARCH" = "armv7h" ]; then
    make $MAKEFLAGS zImage modules dtbs htmldocs
  elif [ "$CARCH" = "x86_64" ] || [ "$CARCH" = "i686" ]; then
    make bzImage modules htmldocs
  fi
}

_package() {
  pkgdesc="The ${pkgbase^} kernel and modules with a handful of awesome features not merged into mainline [AUFS, BFQ, BFS, UKSM]"
  [[ $pkgbase = linux-libre ]] && groups=(base base-openrc)
  depends=(coreutils linux-libre-firmware kmod mkinitcpio)
  optdepends=('crda: to set the correct wireless channels of your country')
  provides=("${_replacesarchkernel[@]/%/=${_archpkgver}}" "LINUX-ABI_VERSION=${_srcver%%-*}")
  conflicts=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
  replaces=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
  backup=("etc/mkinitcpio.d/$pkgbase.preset")
  install=linux.install

  local kernver="$(<version)"

  cd $_srcname

  msg2 "Installing boot image..."
  if [ "$CARCH" = "armv7h" ]; then
    make INSTALL_DTBS_PATH="$pkgdir/boot/dtbs/$pkgbase" dtbs_install
    cp arch/$KARCH/boot/zImage "$pkgdir/boot/vmlinuz-$pkgbase"
  elif [ "$CARCH" = "x86_64" ] || [ "$CARCH" = "i686" ]; then
    install -Dm644 "$(make -s image_name)" "$pkgdir/boot/vmlinuz-$pkgbase"
  fi

  msg2 "Installing modules..."
  local modulesdir="$pkgdir/usr/lib/modules/$kernver"
  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
  if [ "$CARCH" = "armv7h" ]; then
  local subst="
    s|/boot/vmlinuz-%PKGBASE%|$kernver|g
    s|%PKGBASE%|$pkgbase|g
    s|%KERNVER%|$kernver|g
    s|%EXTRAMODULES%|$extramodules|g
  "
  else
  local subst="
    s|%PKGBASE%|$pkgbase|g
    s|%KERNVER%|$kernver|g
    s|%EXTRAMODULES%|$extramodules|g
  "
  fi

  # 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 ${pkgbase^} kernel"
  provides=("${_replacesarchkernel[@]/%/-headers=${_archpkgver}}")
  conflicts=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")
  replaces=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")

  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 "$builddir/arch/$KARCH" -m644 arch/$KARCH/Makefile
  if [[ $CARCH = i686 ]]; then
    install -Dt "$builddir/arch/$KARCH" -m644 arch/$KARCH/Makefile_32.cpu
  fi
  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/$KARCH" -a arch/$KARCH/include
  install -Dt "$builddir/arch/$KARCH/kernel" -m644 arch/$KARCH/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
    [[ $arch = */$KARCH/ ]] && continue
    echo "Removing $(basename "$arch")"
    rm -r "$arch"
  done

  msg2 "Removing documentation..."
  rm -r "$builddir/Documentation"

  # Parabola changes
  # 
  # since we don't want to diverge too much from Arch's PKGBUILD, we'll
  # start marking our changes as such
  if [ "$CARCH" = "armv7h" ]; then
    for i in dove exynos omap2; do
      mkdir -p "$pkgdir/usr/lib/modules/$kernver/build/arch/$KARCH/mach-$i"
      cp -a arch/$KARCH/mach-$i/include "$pkgdir/usr/lib/modules/$kernver/build/arch/$KARCH/mach-$i/"
    done
    for i in omap orion samsung versatile; do
      mkdir -p "$pkgdir/usr/lib/modules/$kernver/build/arch/$KARCH/plat-$i"
      cp -a arch/$KARCH/plat-$i/include "$pkgdir/usr/lib/modules/$kernver/build/arch/$KARCH/plat-$i/"
    done
  fi
  # end of Parabola changes

  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 ${pkgbase^} kernel"
  provides=("${_replacesarchkernel[@]/%/-docs=${_archpkgver}}")
  conflicts=("${_replacesarchkernel[@]/%/-docs}" "${_replacesoldkernels[@]/%/-docs}")
  replaces=("${_replacesarchkernel[@]/%/-docs}" "${_replacesoldkernels[@]/%/-docs}")
  
  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

# vim:set ts=8 sts=2 sw=2 et: