# Maintainer: Gaggory Tsai <gaggery.tsai@intel.com> Spencer Bull <Spencer.Bull@Dell.com>
# Based on Arch Linux linux package by Jan Alexander Steffens (heftig)

pkgbase=linux-ptl
pkgver=7.1.3.arch1
pkgrel=1
pkgdesc='Linux with Panther Lake hardware backports (SDCA audio, PSR2, Panel Replay SU)'
url='https://github.com/archlinux/linux'
arch=(
  x86_64
)
license=(GPL-2.0-only)
makedepends=(
  bc
  binutils
  cpio
  gettext
  glibc
  libelf
  libgcc
  openssl
  pahole
  perl
  python
  rust
  rust-bindgen
  rust-src
  tar
  xxhash
  xz
  zlib
  zstd
)
options=(
  !debug
  !strip
)
_srcname=linux-${pkgver%.*}
_srctag=v${pkgver%.*}-${pkgver##*.}
source=(
  https://cdn.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/${_srcname}.tar.{xz,sign}
  $url/releases/download/$_srctag/linux-$_srctag.patch.zst{,.sig}
  0017-ASoC-SDCA-Fix-NULL-pointer-dereference-in-sdca_jack_.patch
  0019-drm-i915-psr-accept-early-transport-for-psr2.patch
  0020-drm-i915-alpm-limit-pr-alpm-to-panel-replay.patch
  0027-drm-i915-trans-push-frame-change-for-panel-replay.patch
  0028-drm-i915-psr-exit-Panel-Replay-for-ALPM-lag.patch
  0029-drm-edid-populate-monitor-range-from-displayid-adaptive-sync.patch
)
source_x86_64=(config.x86_64)
validpgpkeys=(
  ABAF11C65A2970B130ABE3C479BE3E4300411886  # Linus Torvalds
  647F28654894E3BD457199BE38DBBDC86092693E  # Greg Kroah-Hartman
  83BC8889351B5DEBBB68416EB8AC08600F108CDF  # Jan Alexander Steffens (heftig)
)
b2sums=('b6466e2798627522f0339c670a223b21266f4d4ede39163867c0f122295e54c5d24093abb51d5c6c6c917de0cb199836e81f45f7c391a5cc138cac2a519438e8'
        'SKIP'
        'b402dbf0b29131c2c3fe80406c5560e3e1a5c1384d6a1ba670793b343d57300ec312da7d3a4f7b3f44a6615b015d7fbebb2c7df832a99aa0e1941faef0481baa'
        'SKIP'
        'b5c40077f538e67496f1c274774976d31c48af36a6bd0a5df570eddf097b18f79812ee811392534dae8b911dc1f2a9949d969f90ce4ad7bdf62692456908c1be'
        'f893d63ef7b9e3ab05907117b561971a54c07422c46f7ec4511470b5dc81ab53815b6c73fac2b829fac43f4c480caa2f26741d604ad9ea5ecb460f7750f71635'
        '217aed0e9dbb96ed845a1d686be7df3e27602600ab8b5fb663a54dbcd550c8e4bb2acce3bb8ed4d6ef268d5de1c6068d97d374de8ea2f208389a13dbb1ffa1c3'
        '63339c2b7a073302c3e56148c1834fd9aed2adfcbb282c79fbc491c0013d9e16409cb46e3e3ff4d2cf6f39818b3873b449939e8d8c43acc664529a6e32229beb'
        '4daaa96fac95436ad83ada07bb313ba1219b8b6c30f21b3d131d0f4731cd3739190c398b39ea9db636318b107b4ddd9c43ff7e15ac738d94dd2cfcc70d115264'
        'c17328b6025bb55f229591506d7fff887f5da9580caf59e675dbaeee17447ef07254f70cf5282d6c46b4820a10724090a3e96b728f685dbbe26e1d08d17958d2')
b2sums_x86_64=('f08103d44e5506637ed115067c714e6184e0de538eea1c45a3d2ee8160a36d91755ca5f6cf1f4d7bc4500ed62bc69ca51fa21bef26a40c3a49c4e0f8df835c16')

# https://www.kernel.org/pub/linux/kernel/v7.x/sha256sums.asc
sha256sums=('be41c068e88f5242a19bccdbffbe077b18c47b45f627e2325504b4fab79dd1dc'
            'SKIP'
            '861ea54a40c1d25296422fd48eac2e02b46e0071b3d99a6c28555ae3acc8edd7'
            'SKIP'
            '167446c23001fe9d8dbe017e57a36f7f6e69f67a6b501ccbd9f4301ff08f8a47'
            'a65fb17db3c5c44a9d1728d0bf182f20e0867eaabcdc20c76329e65d5cae2dd1'
            '0ab145668a04b983b110b49fbd5a12f55c69106c7bb49cb968fff87392cc1c46'
            'd4355299c1917a53b366e91c07e30bf595ade63654cfbca5ea8a2238730084a5'
            '39530f920476e79578f41fbed94de825dd0e2285d578d1b5c5302e65e39b045f'
            '3f6e98250b864125501a9968118861424977b3765eb4fcba7248735ed0b667ae')

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

prepare() {
  cd $_srcname

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

  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
  make -C tools/bpf/bpftool vmlinux.h feature-clang-bpf-co-re=1
}

_package() {
  pkgdesc="The $pkgdesc kernel and modules"
  depends=(
    coreutils
    initramfs
    kmod
    sof-firmware
  )
  optdepends=(
    "$pkgbase-headers: headers and scripts for building modules"
    'linux-firmware: firmware images needed for some devices'
    'scx-scheds: to use sched-ext schedulers'
    'wireless-regdb: to set the correct wireless channels of your country'
  )
  provides=(
    KSMBD-MODULE
    NTSYNC-MODULE
    VIRTUALBOX-GUEST-MODULES
    WIREGUARD-MODULE
  )
  replaces=(
    virtualbox-guest-modules-arch
    wireguard-arch
  )

  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
}

_package-headers() {
  pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
  depends=(
    binutils
    glibc
    libelf
    libgcc
    openssl
    pahole
    xxhash
    zlib
    zstd
  )
  provides=(LINUX-HEADERS)

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

  local karch
  case $CARCH in
    x86_64) karch=x86 ;;
    *) echo "Unknown CARCH $CARCH"; exit 1 ;;
  esac

  echo "Installing build files..."
  install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
    localversion.* version vmlinux tools/bpf/bpftool/vmlinux.h
  install -Dt "$builddir/kernel" -m644 kernel/Makefile
  install -Dt "$builddir/arch/$karch" -m644 arch/$karch/Makefile
  cp -t "$builddir" -a scripts
  ln -srt "$builddir" "$builddir/scripts/gdb/vmlinux-gdb.py"

  if [[ $(scripts/config -s CONFIG_HAVE_STACK_VALIDATION) = y ]]; then
    install -Dt "$builddir/tools/objtool" tools/objtool/objtool
  fi

  if [[ $(scripts/config -s CONFIG_DEBUG_INFO_BTF_MODULES) = y ]]; then
    install -Dt "$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 "Installing Rust files..."
  if [[ $(scripts/config -s CONFIG_RUST) = y ]]; then
    install -Dt "$builddir/rust" -m644 rust/*.rmeta
    install -Dt "$builddir/rust" rust/*.so
  fi

  echo "Installing unstripped VDSO..."
  make INSTALL_MOD_PATH="$pkgdir/usr" vdso_install \
    link=  # Suppress build-id symlinks

  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"

  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"
)
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: