# Maintainer: Kira <[@kira](https://dev.kira-linux.org/kira)>

pkgbase=linux-kira-lts
pkgver=6.18.46
pkgrel=1
pkgdesc='Kira LTS Linux'
url='https://www.kernel.org'
_bcachefs_ver=1.39.2
_nyanit_ver=0.2.1-1

arch=(x86_64)
makedepends=(
  bcachefs-tools
  bc
  binutils
  cpio
  dosfstools
  coreutils
  pax-utils
  gettext
  glibc
  libelf
  libgcc
  openssl
  pahole
  perl
  python
  rust
  rust-bindgen
  rust-src
  tar
  xxhash
  xz
  zlib
  zstd
  graphviz
  imagemagick
  python-sphinx
  python-yaml
  texlive-latexextra
)
options=(
  !debug
)
_nyanit_src=v${_nyanit_ver}.tar.gz
_nyanit_src_dir=nyanit
_bcachefs_src_dir=bcachefs-tools-$_bcachefs_ver
_srcname=linux-$pkgver
_srctag=v$pkgver

source=(
  https://cdn.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/${_srcname}.tar.{xz,sign}
  https://github.com/koverstreet/bcachefs-tools/archive/refs/tags/v${_bcachefs_ver}.tar.gz
  https://dev.kira-linux.org/kira-linux/nyanit/archive/${_nyanit_src}
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
  0002-drm-amdgpu-avoid-memory-allocation-in-the-critical-code-path-v3.patch
  0003-drm-amdgpu-use-GFP_ATOMIC-instead-of-NOWAIT-in-the-critical-path.patch
  kira_config_x86_64_base
  kira_config_x86_64_smol.fragment
  kira_disable_guest_vm.fragment
)
validpgpkeys=(
  ABAF11C65A2970B130ABE3C479BE3E4300411886  # Linus Torvalds
  647F28654894E3BD457199BE38DBBDC86092693E  # Greg Kroah-Hartman
)

# https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
sha256sums=('f5d44b93808b02cc2969c5404ba081d97523719c9fd2ba2de6db318b4141cca0'
            'SKIP'
            '87e08942d4a94a38c463202cde31b2923e1fb67698e661a61c781f80b95e4997'
            '9c8e20c3d32174037b26fea4e936467ed9391284bf7ff4675ecf4a83fd820742'
            'e5bda61fa4405571a0267cd8812329bb8a432a37efb50459461628d371849906'
            'c31b8c0ace123f5c1a0012a1254272eea9ac9cdd0d3e5d538ca6b11830dd01b0'
            '0f482368b62c3cece941e2d3ba497bf322db59315df5c2f72500fc1318e4768e'
            'e652e2d7ccb388802684ae5ab4481fb33b78212b8a97d579b9be80060b02df18'
            'cc00807a0b1a0163728c797195b2cb97c23930118bfb47fa24c00b35527c3519'
            'c6aa9877b0612805690d8abfc13c941530a11a7b56979d814e674c86c42ca0cf')
b2sums=('0a378ec56bfc97a2de3403e37bc7a3fe8e3fb876f4afdb5278310362745ec192acd56c9330e42f52019b6c35244f95691efb14afed338347a95f9846fcb386ca'
        'SKIP'
        '79d40bbd52345c6c2aa682ad1ddd8bc98b1e32110f34b82c0076cf6cadad9a24ea83e866727b9cbd18e23b46194d1f5a7b5d82e4e2719f3e97dc25f106a81d92'
        '05f25e60c491b7ef558d832addd44784db09170418f643ad341050dddb60a78fb9feb9fb47603cdd4a651eacf1b1cbf515bf37dadf84b8dfc2755c1eeead7c30'
        '5b3597cab8b174ff41b3f17aae6d1376a155356f781542e2e176d66c5a6dee53f7a1db8e2b9540ce8246efac4e27476c882fc8cc8063f0f514ae09230b5aef0a'
        'a71f78bea42d158fc9383f2bbb985dafa71274d2032876b67f84602c8085b1c53f3d36965e54e5fdbab5c0d7537c98d917bd7743d3cf373c1dcb6da3bc19f4e7'
        'c9d4ec8fac86a9b6f0567c57f6d5be04d56f8efbc9dc1b183981dad38387d750b53c17fcdd295cb68a874bf50f81d117cfe94bd3a8d9e08e1918644ae8daa3e5'
        '1127262c540b09fc030854db6e6f4c93ab2475956f986d6327c99a0ff87eea635ea7bb0d1cdb246d0a64b938d6be59cf847d359c6f084db2b424a0ceeebcfab7'
        '938ff785b5ff3ec883b65e16d422889691624c996e01bcd1c91e9b80903fc32211c10eba1fe11f13f984a7d6c5264f1765f00678abeb82894d794b3eb7ad6dc3'
        '2d581d66fe4e4afe0158755f5ea0cd0df9765b63464cb81e2b9115a37230e4489f16526393c47009c4392e5de70d2d37e496f764ad89e214ec7010c5bbfbcfc1')

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

prepare() {

  cd $_bcachefs_src_dir
  echo "Copy BCACHEFS sources"
  sh scripts/install-to-kernel.sh $srcdir/$_srcname
  echo "Done."
  cd $srcdir

  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..."

  echo "doing make olddefconfig for base config..."
  cp ../kira_config_x86_64_base .config
  make olddefconfig
  diff -u ../kira_config_x86_64_base .config || :
  echo "################## DONE make olddefconfig for base config #####################"
  echo ""


  #No need to apply this unless something changes

  echo "################## Apply kira_config_x86_64_smol.fragment ################## "
  ./scripts/kconfig/merge_config.sh .config "$srcdir/kira_config_x86_64_smol.fragment"
  echo "################## DONE Apply kira_config_x86_64_smol.fragment #####################"
  echo ""

  echo "################## Apply kira_disable_guest_vm.fragment ##################"
  ./scripts/kconfig/merge_config.sh .config "$srcdir/kira_disable_guest_vm.fragment"
  echo "################## DONE Apply kira_disable_guest_vm.fragment #####################"
  echo ""
  
  make -s kernelrelease > version
  echo "Prepared $pkgbase version $(<version)"
}


build() {

  echo "Building NYANIT..."
  cd $_nyanit_src_dir
  cargo build --release
  cp target/release/nyanit $srcdir/init
  chmod +x $srcdir/init
  echo "##### DONE Building NYANIT #####"
  echo ""

  echo "Build initramfs image..."
  cd $srcdir
  $_nyanit_src_dir/build_initcpio.sh $srcdir
  mv $srcdir/initramfs.cpio $srcdir/$_srcname/
  echo ""

  echo "Build Linux..."

  cd $srcdir/$_srcname

  echo "Building docs..."
  make htmldocs SPHINXOPTS=-QT &
  local pid_docs=$!

  echo "Building all"
  make all
  echo ""

  # BPF stuff that makes world a worse place
  # make -C tools/bpf/bpftool vmlinux.h feature-clang-bpf-co-re=1

  wait "${pid_docs}"
}

_package() {
  pkgdesc="The $pkgdesc kernel and modules"
  license=(
    'Apache-2.0 OR MIT'

    'BSD-2-Clause OR GPL-2.0-or-later'

    BSD-3-Clause
    'BSD-3-Clause OR GPL-2.0-only'
    'BSD-3-Clause OR GPL-2.0-or-later'
    BSD-3-Clause-Clear

    GPL-1.0-or-later
    'GPL-1.0-or-later OR BSD-3-Clause'

    GPL-2.0-only
    'GPL-2.0-only OR Apache-2.0'
    'GPL-2.0-only OR BSD-2-Clause'
    'GPL-2.0-only OR BSD-3-Clause'
    'GPL-2.0-only OR CDDL-1.0'
    'GPL-2.0-only OR Linux-OpenIB'
    'GPL-2.0-only OR MIT'
    'GPL-2.0-only OR MPL-1.1'
    'GPL-2.0-only OR X11'
    'GPL-2.0-only WITH Linux-syscall-note'

    GPL-2.0-or-later
    'GPL-2.0-or-later OR BSD-2-Clause'
    'GPL-2.0-or-later OR BSD-3-Clause'
    'GPL-2.0-or-later OR MIT'
    'GPL-2.0-or-later OR X11'
    'GPL-2.0-or-later WITH GCC-exception-2.0'

    ISC

    LGPL-2.0-or-later
    'LGPL-2.1-only'
    'LGPL-2.1-only OR BSD-2-Clause'

    LGPL-2.1-or-later

    MIT
    MPL-1.1
    X11
    Zlib
  )
  depends=(
    coreutils
    kmod
  )
  optdepends=(
    'wireless-regdb: to set the correct wireless channels of your country'
    'linux-firmware: firmware images needed for some devices'
    'scx-scheds: to use sched-ext schedulers'
  )
  provides=(
    KSMBD-MODULE
    NTSYNC-MODULE
    VIRTUALBOX-GUEST-MODULES
    WIREGUARD-MODULE
    'initramfs'
  )
  replaces=(
    wireguard-lts
    bcachefs-dkms
  )

  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

  # licenses
  install -vDm 644 LICENSES/deprecated/{GPL-1.0,ISC,Linux-OpenIB,X11,Zlib} -t "$pkgdir/usr/share/licenses/$pkgname/"
  install -vDm 644 LICENSES/preferred/{BSD,MIT}* -t "$pkgdir/usr/share/licenses/$pkgname/"
  install -vDm 644 LICENSES/exceptions/* -t "$pkgdir/usr/share/licenses/$pkgname/"
}

_package-headers() {
  pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
  license=(
    BSD-3-Clause
    'BSD-3-Clause OR GPL-2.0-only'

    GPL-1.0-or-later
    'GPL-1.0-or-later WITH Linux-syscall-note'

    GPL-2.0-only
    'GPL-2.0-only OR Apache-2.0'
    'GPL-2.0-only OR BSD-2-Clause'
    'GPL-2.0-only OR BSD-3-Clause'
    'GPL-2.0-only OR CDDL-1.0'
    'GPL-2.0-only OR Linux-OpenIB'
    'GPL-2.0-only OR Linux-OpenIB OR BSD-2-Clause'
    'GPL-2.0-only OR MIT'
    'GPL-2.0-only OR MPL-1.1'
    'GPL-2.0-only OR X11'
    'GPL-2.0-only WITH Linux-syscall-note'
    '(GPL-2.0-only WITH Linux-syscall-note) AND MIT'
    '(GPL-2.0-only WITH Linux-syscall-note) OR BSD-2-Clause'
    '(GPL-2.0-only WITH Linux-syscall-note) OR BSD-3-Clause'
    '(GPL-2.0-only WITH Linux-syscall-note) OR CDDL-1.0'
    '(GPL-2.0-only WITH Linux-syscall-note) OR Linux-OpenIB'
    '(GPL-2.0-only WITH Linux-syscall-note) OR MIT'

    GPL-2.0-or-later
    'GPL-2.0-or-later OR BSD-2-Clause'
    'GPL-2.0-or-later OR BSD-3-Clause'
    'GPL-2.0-or-later OR MIT'
    'GPL-2.0-or-later WITH Linux-syscall-note'
    '(GPL-2.0-or-later WITH Linux-syscall-note) OR BSD-3-Clause'
    '(GPL-2.0-or-later WITH Linux-syscall-note) OR MIT'
    'LGPL-2.0-or-later OR BSD-2-Clause'
    'LGPL-2.0-or-later WITH Linux-syscall-note'

    ISC

    'LGPL-2.0-or-later WITH Linux-syscall-note'
    'LGPL-2.0-or-later OR BSD-2-Clause'

    LGPL-2.1-only
    'LGPL-2.1-only OR BSD-2-Clause'
    'LGPL-2.1-only OR MIT'
    'LGPL-2.1-only WITH Linux-syscall-note'

    LGPL-2.1-or-later
    'LGPL-2.1-or-later OR BSD-2-Clause'
    'LGPL-2.1-or-later WITH Linux-syscall-note'

    MIT
    Zlib
  )
  depends=(pahole)
  provides=(LINUX-HEADERS)

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

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

  # required when STACK_VALIDATION is enabled
  install -Dt "$builddir/tools/objtool" tools/objtool/objtool

  # required when DEBUG_INFO_BTF_MODULES is enabled
  # install -Dt "$builddir/tools/bpf/resolve_btfids" tools/bpf/resolve_btfids/resolve_btfids

  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

  # 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..."
  install -Dt "$builddir/rust" -m644 rust/*.rmeta
  install -Dt "$builddir/rust" rust/*.so

  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 = */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 "$(file -Sib "$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"

  # licenses
  install -vDm 644 LICENSES/deprecated/{ISC,Linux-OpenIB,X11,Zlib} -t "$pkgdir/usr/share/licenses/$pkgname/"
  install -vDm 644 LICENSES/preferred/{BSD*,MIT} -t "$pkgdir/usr/share/licenses/$pkgname/"
  install -vDm 644 LICENSES/exceptions/* -t "$pkgdir/usr/share/licenses/$pkgname/"
}

_package-docs() {
  pkgdesc="Documentation for the $pkgdesc kernel"
  license=(
    BSD-3-Clause

    GFDL-1.1-no-invariants-or-later

    GPL-2.0-only
    'GPL-2.0-only OR BSD-2-Clause'
    'GPL-2.0-only OR BSD-3-Clause'
    'GPL-2.0-only OR GFDL-1.1-no-invariants-or-later'
    'GPL-2.0-only OR GFDL-1.2-no-invariants-only'
    'GPL-2.0-only OR MIT'

    GPL-2.0-or-later
    'GPL-2.0-or-later OR BSD-2-Clause'
    'GPL-2.0-or-later OR CC-BY-4.0'
    'GPL-2.0-or-later OR MIT'
    'GPL-2.0-or-later OR X11'

    'LGPL-2.1-only OR BSD-2-Clause'

    MIT
  )

  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"

  # licenses
  install -vDm 644 LICENSES/deprecated/X11 -t "$pkgdir/usr/share/licenses/$pkgname/"
  install -vDm 644 LICENSES/preferred/{BSD*,MIT} -t "$pkgdir/usr/share/licenses/$pkgname/"
}


pkgname=(
  "$pkgbase"
  "$pkgbase-headers"
  "$pkgbase-docs"
)

for _p in "${pkgname[@]}"; do
  eval "package_$_p() {
    $(declare -f "_package${_p#$pkgbase}")
    _package${_p#$pkgbase}
  }"
done