# Maintainer: David P. <megver83@parabola.nu>
# Contributor: André Silva <emulatorman@hyperbola.info>
# Contributor: Márcio Silva <coadde@hyperbola.info>
# Contributor: fauno <fauno@parabola.nu>
# Contributor: Sorin-Mihai Vârgolici <smv@yobicore.org>
# Contributor: Michał Masłowski <mtjm@mtjm.eu>
# Contributor: Luke R. <g4jc@openmailbox.org>
# Contributor: Andreas Grapentin <andreas@grapentin.org>

# Based on linux-lts package

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

pkgbase=linux-libre-lts
pkgver=5.4.41
pkgrel=1
pkgdesc='LTS Linux-libre'
rcnver=5.4.40
rcnrel=armv7-x27
url='https://linux-libre.fsfla.org/'
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/linux-libre/logos/logo_linux_"{clut224.ppm,vga16.ppm,mono.pbm}{,.sig}
  config.i686 config.x86_64 config.armv7h    # the main kernel config files
  linux-armv7h.preset                        # armv7h preset file for mkinitcpio ramdisk

  # 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
  # Arch Linux patches
  0001-add-sysctl-and-CONFIG-for-unprivileged_userns_clone.patch
  0001-gcc-common.h-Update-for-GCC-10.patch
  0002-Makefile-disallow-data-races-on-gcc-10-as-well.patch
  0003-x86-Fix-early-boot-crash-on-gcc-10-next-try.patch
  sphinx-workaround.patch
)
source_armv7h=(
  # RCN patch (CM3 firmware deblobbed and bloatware removed)
  "https://repo.parabola.nu/other/rcn-libre/patches/$rcnver/rcn-libre-$rcnver-$rcnrel.patch"{,.sig}
  # Arch Linux ARM patches
  0001-ARM-atags-add-support-for-Marvell-s-u-boot.patch
  0002-ARM-atags-fdt-retrieve-MAC-addresses-from-Marvell-bo.patch
  0003-SMILE-Plug-device-tree-file.patch
  0004-fix-mvsdio-eMMC-timing.patch
  0005-net-smsc95xx-Allow-mac-address-to-be-set-as-a-parame.patch
  0006-set-default-cubietruck-led-triggers.patch
  0007-exynos4412-odroid-set-higher-minimum-buck2-regulator.patch
  0008-ARM-dove-enable-ethernet-on-D3Plug.patch
  0009-USB-Armory-MkII-support.patch
)
validpgpkeys=(
  '474402C8C582DAFBE389C427BCB7CF877E7D47A7' # Alexandre Oliva
  '6DB9C4B4F0D8C0DC432CF6E4227CA7C556B2BA78' # David P.
)
sha512sums=('0d0915133864eb031adfc6700066147dcf3e768a50a31c39754950c95ef4fd322dc701cd50af49c403ef0325adfcb07e354d5e46c1be3dcdd719a7a55c963f37'
            'SKIP'
            '0d2b68b42bf3332fe1f0ace81873d599cc12a845f2001764fd8fbdb5f635e57d41917d1b6fdb11770c489ca8bda8a772fd3f218df8672e9d514484476c1ae14b'
            'SKIP'
            '13cb5bc42542e7b8bb104d5f68253f6609e463b6799800418af33eb0272cc269aaa36163c3e6f0aacbdaaa1d05e2827a4a7c4a08a029238439ed08b89c564bb3'
            'SKIP'
            '7a3716bfe3b9f546da309c7492f3e08f8f506813afeb1c737a474c83313d5c313cf4582b65215c2cfce3b74d9d1021c96e8badafe8f6e5b01fe28d2b5c61ae78'
            'SKIP'
            '267295aa0cea65684968420c68b32f1a66a22d018b9d2b2c1ef14267bcf4cb68aaf7099d073cbfefe6c25c8608bdcbbd45f7ac8893fdcecbf1e621abdfe9ecc1'
            'SKIP'
            '2f1d1f927245cc52091ab91e7e523cb6f91cdd435059d087c0268856d1ce8a6ec2af9295a8bdcaa018a40af0ac9a2940900f981b3df5f412a1c059f994e3bf3f'
            '384c81ce24e30d1bbd32e0b6bdfb0409f7f1f9dbb3d7faf438f15d5971ee8fe378659aee831b7ae102d4a7f0a4e7568c45cf603ef85509b2867ed67be0d3f0dc'
            '1079d81e3eb69273022c601b50fce575b41a8042d8f91f95618ffce4cd01f948c69d52fbb2d3b05d9efe58e12fcef1b06498399dc0bda4bef38ab288047b18e1'
            '53103bf55b957b657039510527df0df01279dec59cda115a4d6454e4135025d4546167fa30bdc99107f232561c1e096d8328609ab5a876cf7017176f92ad3e0b'
            '02af4dd2a007e41db0c63822c8ab3b80b5d25646af1906dc85d0ad9bb8bbf5236f8e381d7f91cf99ed4b0978c50aee37cb9567cdeef65b7ec3d91b882852b1af'
            'b8fe56e14006ab866970ddbd501c054ae37186ddc065bb869cf7d18db8c0d455118d5bda3255fb66a0dde38b544655cfe9040ffe46e41d19830b47959b2fb168'
            '5f196378d50dd737d727e424d8f31b7fa8a6b92ba88f0a1467ef79bc37a097160da1fc1fd5cfb4b8983f36f2afdf27eb229ec61b35a15ac2343d660eb416a230'
            'aab1da6c0aae0535fd6ea5115f95fc52c4bbc0cea6580ced62f9c45dd96a392a98173a6f0a15381366d25f1441fb7ad804b36ca639a9219c01e4b911471e7e62'
            'df9306b6d5ee501bd72cd44911441ab34ddca74b4d14601c7e2e001aa451b49c20d0fc6c999d29f03d1b61602f2010460191099c5aae5c0c88809eae4cc1e82a'
            '4c471f5f760261d344c3133429d8c2ddb1615afef5b8c0420d66006124bea8158a61b5100e4ba2a144f8b658493dd81cc05ca564ca813c3331a34eeafdcc86a8'
            '8081673a6594e5fc2fddc98fa434e99817aa822f7136d3c14c8d465fa7b93c9ac5d3a4150a5b632e25b1dc76a814dfa19d8aede37d58b935db288465b6585c58')
sha512sums_armv7h=('8171a88b29bd58866dfb53fa74bcbcb84dbec755da6d0dd2aad54b1aa696c0334a5a87dfee4636c358026ab6b8c83ac75ebe3c5ce625a87fc2d46ebb58c94210'
                   'SKIP'
                   'b576a9c40ba59485c350f71b9234d9e71f245e25b26382bd2f67019f3309c3b5705a6020eae0a9dfccacc763fb2056a5937c0a8ff4e64f99ba1d60f0b2acb03f'
                   '85a13a274d4cbaca3ddbe8eaf883f1a1184765f8d09d6d40bb32defbe0876cb0153513e8db8671d7fc053e383ced793b74245ff29364a760e1a52bb36ebc8e85'
                   'f9ce0bb4f06be6f742d8a31384e90fdab1a4686f14d5a8845e0c341dcfa62ae59db933237174223de9b32f9d91f99125c20ede7dff664755f1d42ea0cecdefdb'
                   'b32623904f984118ebdd8ec31816885d73776ed80a68fa23925e67451f28a8f080dd8545307bb2f857435894adfa8b3db7c8a99aa02b8b3f2b5f8e3223d98a47'
                   'd114f1e69504413e81dd67684f5b1ce69aa09d5bc768c7eee96a7d6b7ec47b32cd8f02593c878b0e9091475467de36a3d7c478e34a39148fa849548f53637b84'
                   'bc0c6b1726679498393be8d4c417c62e1f356fe5c617c71ff23532652fdd5f314e5bfc6172eaca79cd4806b81031bf2f879d7d1a6050ad4c616c04e6bdf93c2a'
                   'b13bea6412580325dba0d02cf0dc712e860f659569ffcb968aa4836fdb2882448cfee4659a675a70affccae02c8d2589d80b7239eef5ae7b615162aeaa76f3bb'
                   'cff59f974651614587313674455a968ae5390a5ca825d204f0e2f8de2b422d577b007f5297a398e2afeb33ed0d324d34ad58ff4cd56e645bd4ca9a6bdc1354c5'
                   '54adbec4b6b85cda901df7d2b3eb1f517f10d3528326e60c7afa4b49ccc7cfb43b0d1f574ceb5d7d03c94a0fbcc97c0ef785258292dd26ed46728355da27332c')

_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
    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

  if [ "$CARCH" = "armv7h" ]; then
    local src_armv7h
    for src_armv7h in "${source_armv7h[@]}"; do
      src_armv7h="${src_armv7h%%::*}"
      src_armv7h="${src_armv7h##*/}"
      [[ $src_armv7h = *.patch ]] || continue
      echo "Applying patch $src_armv7h..."
      patch -Np1 < "../$src_armv7h"
    done
  fi

  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.$CARCH .config
  make olddefconfig

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

build() {
  cd $_srcname
  make all
  make 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}

  if [ "$CARCH" = "armv7h" ]; then
    echo "Installing device tree binaries..."
    make INSTALL_DTBS_PATH="$pkgdir/boot/dtbs/$pkgbase" dtbs_install

    # armv7h presets only work with ALL_kver=$kernver
    backup=("etc/mkinitcpio.d/$pkgbase.preset")
    echo "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
}

_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 "$builddir/arch/$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}

  echo "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

  echo "Installing KConfig files..."
  find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;

  echo "Removing unneeded architectures..."
  local arch
  for arch in "$builddir"/arch/*/; do
    [[ $arch = */$KARCH/ ]] && continue
    echo "Removing $(basename "$arch")"
    rm -r "$arch"
  done

  echo "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

  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"
}

_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"
}

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: