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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

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

pkgbase=linux-libre-pck
pkgver=5.4.10.pck1
pkgrel=1
pkgdesc='Linux-libre PCK'
url='https://wiki.parabola.nu/PCK'
arch=(i686 x86_64 armv7h)
license=(GPL2)
makedepends=(
  bc kmod libelf
  xmlto python-sphinx python-sphinx_rtd_theme graphviz imagemagick
)
options=('!strip')
_srcname=linux-5.4
source=(
  "https://linux-libre.fsfla.org/pub/linux-libre/releases/${_srcname##*-}-gnu/linux-libre-${_srcname##*-}-gnu.tar.xz"{,.sign}
  "https://linux-libre.fsfla.org/pub/linux-libre/releases/${pkgver%.*}-gnu/patch-${_srcname##*-}-gnu-${pkgver%.*}-gnu.xz"{,.sign}
  "https://repo.parabola.nu/other/pck/patches/${pkgver%.*}-gnu/patch-${pkgver%.*}-gnu-${pkgver##*.}.patch"{,.sig}
  config.i686 config.x86_64 config.armv7h    # the main kernel config files
  linux-armv7h.preset                        # armv7h preset file for mkinitcpio ramdisk
)
validpgpkeys=(
  '474402C8C582DAFBE389C427BCB7CF877E7D47A7' # Alexandre Oliva
  '6DB9C4B4F0D8C0DC432CF6E4227CA7C556B2BA78' # David P.
)
sha512sums=('0d0915133864eb031adfc6700066147dcf3e768a50a31c39754950c95ef4fd322dc701cd50af49c403ef0325adfcb07e354d5e46c1be3dcdd719a7a55c963f37'
            'SKIP'
            '0d1d0dea0096f2b7aba13575588dca533386afafbab8c238c478dea88ed3b8259d566a3798a19eed35dbb89d6687ba7d0da351b840f7207f9ca6267aba7b7ac0'
            'SKIP'
            '00944b000e59a77e2c4a5f7d38e9b8d79119ef6c3a5c82111a55360d111faa567aefd0816d399e698966c8742a9f4eab1c30df17eca532c87348809054f4e6bd'
            'SKIP'
            'ff7dd3c13edd9a32479b8c5f5377438758b1d0b95a3f6726d545c7ee58a492770f1c292eff32b04a42b9dbba46d4324d46a062a7774c8c89d072faa93aa6dc7f'
            '8a884300bd7e894b4e0f160f7e1ec5f564e76cae3d4f93eaaea413ea1962d25900e8ce233711b159564316e9d7f8aed548966f4eac40c20781e912ad40260508'
            '5ce8391d76ac5a48a9e3d86394b16b83fb6734f2e2174789d6d59f922cbcb851ceaa0cf5841165ecf7e09c1b5027f61a6c954c55c7ad6f8752ad470f3c35846c'
            'f01e7925b262d2874a8a991b1f27d057356a2a384d2012b61be5a631d4e4d7cf87461c8fb9e7f183831f5a829ad204897f1f0545a52df6288a0e04a5c2e31b96')

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

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

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

prepare() {
  cd $_srcname

  if [ "${_srcname##*-}" != "${pkgver%.*}" ]; then
    msg2 "Applying upstream patch..."
    patch -Np1 -i ../patch-${_srcname##*-}-gnu-${pkgver%.*}-gnu
  fi

  msg2 "Setting version..."
  scripts/setlocalversion --save-scmversion
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "${pkgbase#linux-libre}" > localversion.20-pkgname

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

  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 zImage modules htmldocs dtbs
  else
    make bzImage modules htmldocs
  fi
}

_package() {
  pkgdesc="The $pkgdesc kernel and modules"
  depends=(coreutils kmod initramfs)
  optdepends=('crda: to set the correct wireless channels of your country'
              'linux-libre-firmware: firmware images needed for some devices')
  provides=("${_replacesarchkernel[@]/%/=${pkgver//pck/zen}}" "LINUX-ABI_VERSION=${pkgver%.*}")
  conflicts=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
  replaces=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")

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

  msg2 "Installing boot image..."
  if [ "$CARCH" = "armv7h" ]; then
    make INSTALL_DTBS_PATH="$pkgdir/boot/dtbs/$pkgbase" dtbs_install
  fi
  # systemd expects to find the kernel here to allow hibernation
  # https://github.com/systemd/systemd/commit/edda44605f06a41fb86b7ab8128dcf99161d2344
  install -Dm644 "$(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}

  # armv7h presets only work with ALL_kver=$kernver
  if [ "$CARCH" = "armv7h" ]; then
    backup=("etc/mkinitcpio.d/$pkgbase.preset")

    msg2 "Installing mkinitcpio preset..."
    sed "s|%PKGBASE%|$pkgbase|g;s|%KERNVER%|$kernver|g" ../linux-armv7h.preset \
      | install -Dm644 /dev/stdin "$pkgdir/etc/mkinitcpio.d/$pkgbase.preset"
  fi

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

_package-headers() {
  pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
  provides=("${_replacesarchkernel[@]/%/-headers=${pkgver//pck/zen}}")
  conflicts=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")
  replaces=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")

  cd $_srcname
  local builddir="$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 "$builddir/arch/$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}

  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"

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

_package-docs() {
  pkgdesc="Documentation for the $pkgdesc kernel"
  provides=("${_replacesarchkernel[@]/%/-docs=${pkgver//pck/zen}}")
  conflicts=("${_replacesarchkernel[@]/%/-docs}" "${_replacesoldkernels[@]/%/-docs}")
  replaces=("${_replacesarchkernel[@]/%/-docs}" "${_replacesoldkernels[@]/%/-docs}")

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

  msg2 "Installing documentation..."
  local src dst
  while read -rd '' src; do
    dst="${src#Documentation/}"
    dst="$builddir/Documentation/${dst#output/}"
    install -Dm644 "$src" "$dst"
  done < <(find Documentation -name '.*' -prune -o ! -type d -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: