# Maintainer: David P. <megver83@parabola.nu>
# Contributor: André Silva <emulatorman@hyperbola.info>
# Contributor: Márcio Silva <coadde@hyperbola.info>

# Based on linux-pae package

_replacesarchkernel=('linux%') # '%' gets replaced with kernel suffix
_replacesoldkernels=() # '%' gets replaced with kernel suffix
_replacesoldmodules=() # '%' gets replaced with kernel suffix

pkgbase=linux-libre-pae
pkgver=5.5.5
pkgrel=1
pkgdesc='Linux-libre PAE (physical address extension)'
url='https://linux-libre.fsfla.org/'
arch=(i686)
license=(GPL2)
makedepends=(
  bc kmod libelf
  xmlto python-sphinx python-sphinx_rtd_theme graphviz imagemagick
  cpio
)
options=('!strip')
_srcname=linux-5.5
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/linux-libre/logos/logo_linux_"{clut224.ppm,vga16.ppm,mono.pbm}{,.sig}
  config         # the main kernel config files

  # maintain the TTY over USB disconnects
  # http://www.coreboot.org/EHCI_Gadget_Debug
  0001-usb-serial-gadget-no-TTY-hangup-on-USB-disconnect-WI.patch
  # fix Atmel maXTouch touchscreen support
  # https://labs.parabola.nu/issues/877
  # http://www.fsfla.org/pipermail/linux-libre/2015-November/003202.html
  0002-fix-Atmel-maXTouch-touchscreen-support.patch
  # extracted patches from Arch Linux kernel sources
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
  0002-iwlwifi-pcie-restore-support-for-Killer-Qu-C0-NICs.patch
  0003-iwlwifi-mvm-Do-not-require-PHY_SKU-NVM-section-for-3.patch
  0004-drm-i915-Wean-off-drm_pci_alloc-drm_pci_free.patch
  0005-drm-Remove-PageReserved-manipulation-from-drm_pci_al.patch
  0006-drm-i915-execlists-Always-force-a-context-reload-whe.patch
  0007-drm-i915-Serialise-i915_active_acquire-with-__active.patch
  0008-drm-i915-gem-Take-runtime-pm-wakeref-prior-to-unbind.patch
  0009-drm-i915-gem-Avoid-parking-the-vma-as-we-unbind.patch
  0010-drm-i915-gem-Try-to-flush-pending-unbind-events.patch
  0011-drm-i915-gem-Reinitialise-the-local-list-before-repe.patch
  0012-drm-i915-Add-a-simple-is-bound-check-before-unbindin.patch
  0013-drm-i915-Introduce-a-vma.kref.patch
)
validpgpkeys=(
  '474402C8C582DAFBE389C427BCB7CF877E7D47A7' # Alexandre Oliva
  '6DB9C4B4F0D8C0DC432CF6E4227CA7C556B2BA78' # David P.
)
sha512sums=('187368a8fb4e04acfd7d18a024d6cdbc2841bcc06dcfbc3a053706e8512c3e3f573755228347c11bd791b296ec60eb2d67d5075ece2aef234a847e72f2b3e746'
            'SKIP'
            'd1ff0cd2089118da0311401c7f1f9f3d083af452899f3ffa7f9875d92aa9e85716fe87cbd8c59292d37cd6a37a0ebe68d8b1c0ea433277aaf636dd984fe0a7de'
            'SKIP'
            '13cb5bc42542e7b8bb104d5f68253f6609e463b6799800418af33eb0272cc269aaa36163c3e6f0aacbdaaa1d05e2827a4a7c4a08a029238439ed08b89c564bb3'
            'SKIP'
            '7a3716bfe3b9f546da309c7492f3e08f8f506813afeb1c737a474c83313d5c313cf4582b65215c2cfce3b74d9d1021c96e8badafe8f6e5b01fe28d2b5c61ae78'
            'SKIP'
            '267295aa0cea65684968420c68b32f1a66a22d018b9d2b2c1ef14267bcf4cb68aaf7099d073cbfefe6c25c8608bdcbbd45f7ac8893fdcecbf1e621abdfe9ecc1'
            'SKIP'
            '9b8298a195857108453042090bfebf7736b373b177077926bda7091bc490aeda1872fb51cf126e021eae97096973dfab6d6c858bebf5d565a9df4ffe28d2df2f'
            '02af4dd2a007e41db0c63822c8ab3b80b5d25646af1906dc85d0ad9bb8bbf5236f8e381d7f91cf99ed4b0978c50aee37cb9567cdeef65b7ec3d91b882852b1af'
            'b8fe56e14006ab866970ddbd501c054ae37186ddc065bb869cf7d18db8c0d455118d5bda3255fb66a0dde38b544655cfe9040ffe46e41d19830b47959b2fb168'
            'c5006db63c01ad4f94786e4ed129470d74b9131cf2218c82dcbbc24af7de4881ce7e4c8144e3b2194d6015df328593c8f017d1372ae1e46fe49fe55acf5aac38'
            'ba13e423ef1bba3f46c20bb1c0f68b7533564cc4819aa17cabbf5b89552416341b83f7f65e97d4316412ac78365f25c612fde5c35cb29d27d612c351761a8385'
            '28780156c1cdcc65d41a08cae0184bc6b42d7cf5f7c94fafea475f3e1f388faa28532216b2cdefcfa6a4d55f70cbb21329d48409c6ad9be78a72d212d0e80252'
            '6c13d71552e1a651c7f1e753c6f94210b27f61dee58b8a855a11eed28dcd45afd168b361f2a8ac53b3899cc73322a102c1f99a04496e80b2ead229230883d261'
            'd9d807c2cb6680f494f52c86b54b8ad5b3fafb6bae8a6098a9ebe20383569704cfabded9ad442a9cc8aa05f5a280b76ff41e8b5d504523251e31d753930f3cc3'
            '521a5320af6e56f85662a1fe0749aefa9759e4dc8fd21dd890d409256a67ed2da488dab5d54bb12eb71fbfc14142246f2df98ce4cfab061283a4019a8b748999'
            'b1605a93c97c01d255f19f5da20b0b41d9457a9aa473bb22d52feffab99bca0594f5f8b1cf5fb20862e65c84315ddc7bb162869c3337ff9ee795938856d583ba'
            'e24fa8a4bc8589274fc31edbf3e64cd1639737544982bc2c085e5f064daa16b1d56928115813733b46a758ed047dd415d14b87b7fcd958b7a73766066a7a6c32'
            '2f961f57e8462615a2a01793d21f3ce49be956991cb537de68b80edbf8dd7123a790324c1a5aa81061436eda4eae30a9b710144d9b18a33c22b595710e30667e'
            'd29b49e87e90a773a0d101ff57688c6d55b1145cb6866da8706ed9313660d16e12c4debfd5005a585b33dad741a19de36fd9ccd8b5e18d9979a05e1845df993c'
            '009b4280ba5da1ef78db7582eac04c9e290bfb2f0d7d8ba9574353b1cca9c5dd97c0bf1f85d228dede1f3ac342e35754ba776c2fe755382c65edf1b52f2d9eba'
            '0c2cc5f04a577c42dece649d54e00bf8a1f45880a5f984328a3d4a51887b3d48e30dae3058f9da2fc651a95e204749b5512619752ecfc37227acb21e042e26ff'
            'f41929dd44a929dc3bf5f090f7f8c800112a07f1cc2c5ac1e282d4cff2821001c9daeb35987e8b47e70bde5cf5c06b010cac13b4f00fbcbb56b283069a5b30cc')

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

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
    echo "Applying upstream patch..."
    patch -Np1 < "../patch-${_srcname##*-}-gnu-$pkgver-gnu"
  fi

  echo "Adding freedo as boot logo..."
  install -m644 -t drivers/video/logo \
    ../logo_linux_{clut224.ppm,vga16.ppm,mono.pbm}

  echo "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
    echo "Applying patch $src..."
    patch -Np1 < "../$src"
  done

  echo "Setting config..."
  cp ../config .config
  make olddefconfig

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

build() {
  cd $_srcname
  make bzImage modules htmldocs
}

_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[@]/%/=${pkgver%%_*}}" "LINUX-ABI_VERSION=${pkgver%%_*}")
  conflicts=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
  replaces=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")

  cd $_srcname
  local kernver="$(<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" modules_install

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

  echo "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=${pkgver%%_*}}")
  conflicts=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")
  replaces=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")
  
  cd $_srcname
  local builddir="$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 "$builddir/arch/x86" -m644 arch/x86/Makefile
  install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile_32.cpu
  cp -t "$builddir" -a scripts

  # 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

  # 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

  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 "Adding symlink..."
  mkdir -p "$pkgdir/usr/src"
  ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase"

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

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

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

  echo "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)

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

  echo "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: