# 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=5.4.13
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-5.4
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/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-lib-devres-add-a-helper-function-for-ioremap_uc.patch
  0003-mfd-intel-lpss-Use-devm_ioremap_uc-for-MMIO.patch
  0004-PCI-pciehp-Prevent-deadlock-on-disconnect.patch
  0005-ACPI-PM-s2idle-Rework-ACPI-events-synchronization.patch
  0006-iwlwifi-pcie-restore-support-for-Killer-Qu-C0-NICs.patch
  0007-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-s.patch
  0008-drm-i915-Fix-audio-power-up-sequence-for-gen10-displ.patch
  0009-drm-i915-extend-audio-CDCLK-2-BCLK-constraint-to-mor.patch
  0010-drm-i915-Limit-audio-CDCLK-2-BCLK-constraint-back-to.patch
  0011-pinctrl-sunrisepoint-Add-missing-Interrupt-Status-re.patch
  0012-Revert-iwlwifi-mvm-fix-scan-config-command-size.patch
  0013-e1000e-Revert-e1000e-Make-watchdog-use-delayed-work.patch
  0014-drm-amdgpu-Add-DC-feature-mask-to-disable-fractional.patch
  0015-ptp-free-ptp-device-pin-descriptors-properly.patch
)
validpgpkeys=(
  '474402C8C582DAFBE389C427BCB7CF877E7D47A7' # Alexandre Oliva
  '6DB9C4B4F0D8C0DC432CF6E4227CA7C556B2BA78' # David P.
)
sha512sums=('0d0915133864eb031adfc6700066147dcf3e768a50a31c39754950c95ef4fd322dc701cd50af49c403ef0325adfcb07e354d5e46c1be3dcdd719a7a55c963f37'
            'SKIP'
            '42d6dce820e801297bc05fbe23296e44d803c31bf023e9a30c57a39e8f1b2506d1c54f403494b05ed711ca54c90abe1731c1e2cfd7b7f54e4c9c253fc06bdab6'
            'SKIP'
            '13cb5bc42542e7b8bb104d5f68253f6609e463b6799800418af33eb0272cc269aaa36163c3e6f0aacbdaaa1d05e2827a4a7c4a08a029238439ed08b89c564bb3'
            'SKIP'
            '7a3716bfe3b9f546da309c7492f3e08f8f506813afeb1c737a474c83313d5c313cf4582b65215c2cfce3b74d9d1021c96e8badafe8f6e5b01fe28d2b5c61ae78'
            'SKIP'
            '267295aa0cea65684968420c68b32f1a66a22d018b9d2b2c1ef14267bcf4cb68aaf7099d073cbfefe6c25c8608bdcbbd45f7ac8893fdcecbf1e621abdfe9ecc1'
            'SKIP'
            '63f3c3bfe27eb66391dfa2120193476f03cf668bbd9edf4b7cc5dcb8c53295b830ecb6afd10b9a89c190d7f02597529b484c22dbb849d221ef975af8db1d8049'
            '02af4dd2a007e41db0c63822c8ab3b80b5d25646af1906dc85d0ad9bb8bbf5236f8e381d7f91cf99ed4b0978c50aee37cb9567cdeef65b7ec3d91b882852b1af'
            'b8fe56e14006ab866970ddbd501c054ae37186ddc065bb869cf7d18db8c0d455118d5bda3255fb66a0dde38b544655cfe9040ffe46e41d19830b47959b2fb168'
            '138a96b70f55868ffad027cded2f6b2cb21f2db5564125e25be0c79105520e69a5123351b30c0d7d3ef91694ae95f27dc9f4ac2f07b2ded3c4606cf0ede26a87'
            'da6d11f6a6ecd350d8ab2ce00f0224275388217be944ee21fe2e380305e20412cb510092676ee9c9de385f01576f5e0b74483de9ed2f4b7a1a0cdbb0843b4f58'
            '8689716f1dd249f8bd715bd0b515d935344a1666e903bfe04283a1df4b7f8902e99cd84ef895b6b8becdebac652bfcdc5dcdb50f6a8e40f0280a43431a09a8ed'
            '55d6cd3e450bedb140bdeefb99833694ceb42adf4368f46e1b9626d16c58877f7481fdfb556caebdd3597c85326e2a97dd37117e7a9b12b7c1ebd17a5765ca7f'
            '51e50e5d84ed2987f658fceba7a97e984185d01a1636ca152e886595365676ba1f20ec022ea73e3c0a367acec6b568ce3d413c2267888fd5227a4f0f397e111e'
            '8a96aab6660367f88eb9d577fc1a8abcb43936209778c0b1ccc6d07b961fecd7b1423c4269e9edcbcc218450144f4454b0649387077ae771d9e1e5842ad7f01c'
            '4fed5ae4b0b34ddfd42143b0d27b1e73ed00f961767ef8da028ef4e82455215d9717516ca5f237560e751c571720b43db1b815e0f256d95da109b26158f8aac5'
            '6aeac41670386d816fc2949313c8a67e283fdc8c106c01406e2d67b2cb921bc663723439fb4f1b949ef73b1606c073b1b7cdc2965890aa60959b04b846961318'
            '6c84c33e5844c9a35c4c30ed9d886c0bea5c4e01ab9c873c9fe44e6470ee34650e9ca0c8c0476edfdf13c74ed92b2630f9fcb9b58cb010664d57f27f46d141b4'
            '1f9c3c7e01f5ccb35026c9c3bf1376bc36cdd74314cec97b0490cc1a8e50e8d99653823df2f0a3a84e98dcbe3ea28cbe022c91506a7c6f9252225d1b048db9a9'
            '7c576cb3aa16852772fc1eda6f6b5cec40d47404c71d4bfa2f1806cc84bdbedbbb55de112c073e3b05b02bb5c37aef8f0b65eb9c27fef7d005533d2cd5192c0c'
            '73f0e2e7723f3dd25fab58b13356c0c48e2814835b94473a3ed3c1ab77dd1b7ead9578d3d19b6662a651e020a3b0937e3445492495bc32e8d5aaf80289c82c95'
            'b107c6a933c6c8749c84200f1ddd160e332ff0b60c68a8be45a2c55b32db2939c2a2464c9feaab07f240c038a7e31ee64788ac5bb1a46b5bc217bf720b9b0157'
            'b01b673bbedbcd7d528046777b387db0a3f14067443001c6bb2dcb5c0787bc119234a92df4b1bdb5a1e2765bb15c8dc226bbda3b57c3d4e679264c5874c48d88'
            'ae194a07fa791c1c221690880f7f61e6c7096f26951c9f51699a8ceaebc2c1a2a3e750b81b2926465eb55d5fc3c63c9ab911b120f105c1abfbe6a4038d40f500')

_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: