# 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=6.6.14
pkgrel=1
pkgdesc='LTS Linux-libre'
url='https://linux-libre.fsfla.org/'
arch=(i686 x86_64 armv7h)
license=(GPL2)
makedepends=(
  bc
  cpio
  gettext
  libelf
  pahole
  perl
  python
  tar
  xz

  # htmldocs
  graphviz
  imagemagick
  python-sphinx
  texlive-latexextra
)
options=('!strip')
_srcname=linux-6.6
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
  # https://gitlab.archlinux.org/archlinux/packaging/packages/linux-lts
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
  0002-skip-simpledrm-if-nvidia-drm.modeset=1-is.patch
  0003-Default-to-maximum-amount-of-ASLR-bits.patch
)
source_i686=(
  # avoid using zstd compression in ultra mode (exhausts virtual memory)
  no-ultra-zstd.patch
)
validpgpkeys=(
  474402C8C582DAFBE389C427BCB7CF877E7D47A7 # Alexandre Oliva
  6DB9C4B4F0D8C0DC432CF6E4227CA7C556B2BA78 # David P.
)
sha256sums=('d71785bdb694fefaa4f183e5dd2ffc453c179db6f9427cc37e1ed046f0073ccf'
            'SKIP'
            'fce0be10daa22b9019538c9809726b787f5edf5b1a9a0d22844cce5233a31210'
            'SKIP'
            'bfd4a7f61febe63c880534dcb7c31c5b932dde6acf991810b41a939a93535494'
            'SKIP'
            '6de8a8319271809ffdb072b68d53d155eef12438e6d04ff06a5a4db82c34fa8a'
            'SKIP'
            '13bd7a8d9ed6b6bc971e4cd162262c5a20448a83796af39ce394d827b0e5de74'
            'SKIP'
            'e2ac4c8c597b5493685dec86894d16efe901ea3ca9d4672d7ce748553549bf1c'
            '74b6aad76e0a087038731dc4bc775ec1cc768a55032d5a25e8477b8eb70f0955'
            '2e2d59869253b2a1b3feb4b5dcdccb4a3385e9ae53fc94604492b8298bc2c0ad'
            'ca1708abbd2f8960c278722dc81a7c635973d92872386ad9e2fff10b86836e98'
            '0376bd5efa31d4e2a9d52558777cebd9f0941df8e1adab916c868bf0c05f2fc3'
            '351fd96be8cd5ebd0435c0a8a978673fc023e3b1026085e67f86d815b2285e25'
            '21195509fded29d0256abfce947b5a8ce336d0d3e192f3f8ea90bde9dd95a889'
            '2f23be91455e529d16aa2bbf5f2c7fe3d10812749828fc752240c21b2b845849'
            '6400a06e6eb3a24b650bc3b1bba9626622f132697987f718e7ed6a5b8c0317bc')
sha256sums_i686=('a044d2ed2ac13f0435e94e567f6fd5d8380b694f74e344857ca64ef0c9424a07')
b2sums=('e3e753fed07258f34e2e44e1acd4be0c22a3c58a3ae4856b518a4f99358f5bf6e8f38e41f422d9a434b33b0d7ee972e93ac7d37c9734949d6db263afe4c4f47c'
        'SKIP'
        '00b6f532d3dd8c6cda6c315b9b980411f33dc7e50c4dafe8247a1f023591da21d8b84b415fc4d9277e370ad94b635baa4c90c507e173326fc5ae0369143d4c0a'
        'SKIP'
        '73fee2ae5cb1ffd3e6584e56da86a8b1ff6c713aae54d77c0dab113890fc673dc5f300eb9ed93fb367b045ece8fa80304ff277fe61665eccf7b7ce24f0c045eb'
        'SKIP'
        'd02a1153a4285b32c774dca4560fe37907ccf30b8e487a681b717ed95ae9bed5988875c0a118938e5885ae9d2857e53a6f216b732b6fa3368e3c5fe08c86382c'
        'SKIP'
        '580911af9431c066bbc072fd22d5e2ef65f12d8358cec5ff5a4f1b7deebb86cef6b5c1ad631f42350af72c51d44d2093c71f761234fb224a8b9dbb3b64b8201d'
        'SKIP'
        '79316cdbf03bb4d91e5ebff3229433ee422232a3eb59bca819b8f8a2cada3410aaa630859a63d7cadfb00777425eab90e1054f3f37d32914caf32c8ec668839e'
        '3be29e751d1fe76caeb2474e31ee2df9b119dd6ba0002ca197bce2d66a5554465f839080fe470608a957324ded2a977c3f1635bf905db6cd352beb8ad939fe57'
        '912493240dbcf506cf2cc02b8fd7e7b22de3e369a5bfd87ce5a7faf592e54f112f64422fc0f4fab1ff2c8cd530502b23d24b3a6d5e00f8f95d98f0eb25f8776a'
        'af69176b1117b94e56b043e97b0bd5873a2974a6a2fd52b102d0ffdca440ff68cfb241d6c4d4ef453cc8c220c236b739bad232e53fd500ce7672fa6e5ba87383'
        'c2214154c36900e311531bfe68184f31639f5c50fed23bc3803a7f18439b7ff258552a39f02fed0ea92f10744e17a6c55cef0ef1a98187f978fe480fb3dddc14'
        '0c7ceba7cd90087db3296610a07886f337910bad265a32c052d3a703e6eb8e53f355ab9948d72d366408d968d8ee7435084dd89bef5ed0b69355fd884c2cd468'
        '02a10396c92ab93124139fc3e37b1d4d8654227556d0d11486390da35dfc401ff5784ad86d0d2aa7eacac12bc451aa2ff138749748c7e24deadd040d5404734c'
        '5dc21a7a6f0b840e6a671dcf09a865e42f0e2c000d5e45d3f3202c02946a8ab2207858d0b2ef1004648b8c2963efb428298b263c8494be806dfc9b6af66d5413'
        'ba6ebe349b3757411364a9ba2deaa30a8d71a247d518c159385977c2b4782771bda4edfc96bd954808617c9ba984d832471b63c11f5bd6003369bfe4051df31f')
b2sums_i686=('e7915714b504b92155c983a30df6d97966c14520dc9eb004671003dbdecf454b061138a6d237cabe86be32ae2ea4c598cdb821cb1dd52f6a9bfe5e280bffa321')

_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..."
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "${pkgbase#linux-libre}" > localversion.20-pkgname

  local source=("${source[@]}")
  case "$CARCH" in
    "armv7h")
      source+=("${source_armv7h[@]}") ;;
    "i686")
      source+=("${source_i686[@]}") ;;
  esac

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

  echo "Setting config..."
  cp ../config.$CARCH .config
  make olddefconfig
  diff -u ../config.$CARCH .config || :

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

build() {
  cd $_srcname
  make all

  # temporarily disabled documentation due to sphinx_rtd_theme (FS32#163)
  if [ "$CARCH" != "i686" ]; then
    make htmldocs
  fi
}

_package() {
  pkgdesc="The $pkgdesc kernel and modules"
  depends=(
    coreutils
    initramfs
    kmod
  )
  optdepends=(
    'wireless-regdb: to set the correct wireless channels of your country'
    'linux-libre-firmware: firmware images needed for some devices'
  )
  provides=(
    KSMBD-MODULE
    VIRTUALBOX-GUEST-MODULES
    WIREGUARD-MODULE
  )
  replaces=(
    wireguard-lts
  )
  provides+=("${_replacesarchkernel[@]/%/=$pkgver}" "LINUX-ABI_VERSION=$pkgver")
  conflicts+=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
  replaces+=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")

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

  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..."
  ZSTD_CLEVEL=19 make INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 \
    DEPMOD=/doesnt/exist modules_install  # Suppress depmod

  # remove build link
  rm "$modulesdir"/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=$(<version)
    backup+=("etc/mkinitcpio.d/$pkgbase.preset")
    echo "Installing mkinitcpio preset..."
    sed "s|%PKGBASE%|$pkgbase|g;s|%KERNVER%|$(<version)|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 $pkgdesc kernel"
  depends=(pahole)
  provides=("${_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/x86" -m644 arch/x86/Makefile_32.cpu
  fi
  cp -t "$builddir" -a scripts

  # required when STACK_VALIDATION is enabled
  if [[ -e tools/objtool/objtool ]]; then
    install -Dt "$builddir/tools/objtool" tools/objtool/objtool
  fi

  # required when DEBUG_INFO_BTF_MODULES is enabled
  if [[ -e tools/bpf/resolve_btfids/resolve_btfids ]]; then
    install -Dt "$builddir/tools/bpf/resolve_btfids" tools/bpf/resolve_btfids/resolve_btfids
  fi

  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

  # https://bugs.archlinux.org/task/13146
  install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h

  # https://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

  # https://bugs.archlinux.org/task/71392
  install -Dt "$builddir/drivers/iio/common/hid-sensors" -m644 drivers/iio/common/hid-sensors/*.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"

  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 "$(file -Sib "$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 "Stripping vmlinux..."
  strip -v $STRIP_STATIC "$builddir/vmlinux"

  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:
