#!/usr/bin/bash
# JOBoRun		: Jwm OpenBox Obarun RUNit
# Maintainer	: Joe Bo Run <joborun@disroot.org>
# PkgSource		: url="https://gittea.disroot.org/joborun-pkg/jobcore/$pkgname"
# Website		: https://pozol.eu
#-----------------------------------------| DESCRIPTION |---------------------------------------

pkgbase=linux-lts54
pkgver=5.4.254
pkgrel=01
pkgdesc='LTS Linux 5.4 + nvme-fix patch w/o zstd & ipv6'
#url="https://www.kernel.org/"
makedepends=(bc kmod libelf pahole cpio perl tar xz kmod
  xmlto python-sphinx python-sphinx_rtd_theme graphviz imagemagick) # python-six 
options=('!strip')
_srcname=linux-$pkgver
url="https://cdn.kernel.org/pub/linux/kernel"
source=($url/v5.x/$_srcname.tar.{xz,sign}
  config         # the main kernel config file
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
  0002-virt-vbox-Add-support-for-the-new-VBG_IOCTL_ACQUIRE_.patch
  sha256sums::https://cdn.kernel.org/pub/linux/kernel/v5.x/sha256sums.asc)

#  sphinx-workaround.patch) # patch for Sphinx HTMLDOCS

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

prepare() {
  cd $_srcname

  echo "Setting version... $pkgver"
  scripts/setlocalversion --save-scmversion
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "${pkgbase#linux}" > 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 joborun config..."
  cp ../config .config
  make olddefconfig
  diff -u ../config .config || :

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

build() {
  cd $_srcname
  make all
}
##  make htmldocs

_package() {
  pkgdesc="The $pkgdesc kernel and modules w/o zstd ipv6 touchscreen"
  depends=(coreutils kmod initramfs)
  optdepends=('wireless-regdb: to set the correct wireless channels of your country'
              'linux-firmware: firmware images needed for some devices')
  provides=(VIRTUALBOX-GUEST-MODULES WIREGUARD-MODULE)
  replaces=(virtualbox-guest-modules wireguard)

  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" INSTALL_MOD_STRIP=1 \
  DEPMOD=/doesnt/exist modules_install  # Suppress depmod

  # remove build and source links
  rm "$modulesdir"/{source,build}
}

_package-headers() {
  pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
  depends=(pahole)

  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 "$builddir/arch/x86" -m644 arch/x86/Makefile
  cp -t "$builddir" -a scripts

  # required when STACK_VALIDATION is enabled
  # add objtool for external module building and enabled VALIDATION_STACK option
  install -Dt "$builddir/tools/objtool" tools/objtool/objtool

  # 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

  # 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 = */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"
}

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

#---- arch license gpg-key & sha256sums ----

arch=(x86_64)

license=(GPL2)

validpgpkeys=(ABAF11C65A2970B130ABE3C479BE3E4300411886 # Linus Torvalds
	647F28654894E3BD457199BE38DBBDC86092693E) # Greg Kroah-Hartman

# https://cdn.kernel.org/pub/linux/kernel/v5.x/sha256sums.asc
# 3a78587523940374a7319089b63357c7dc412b90f5879d512265e59173588267  linux-5.4.252.tar.xz

sha256sums=(51608da961b5e34d6a9452a7b302699e109633f769a4253c74b1048abba8d9c7  # linux-5.4.254.tar.xz
	d1d7d02223afa89b7c2131648db9a05258550af7d0d5e57b40101f87db0733c0  # linux-5.4.254.tar.sign
	1742478e0fb575e51af151ccad26e71d473315f3bbf75c1a1a0e23fa94241209  # config
	b439f57b84bc98730c0265695abb92385ee4dcd35a5c00d4cb3d3155c75fb491  # 0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
	4fd74bb2a7101d700fba91806141339d8c9e46a14f8fc1fe276cfb68f1eec0f5  # 0002-virt-vbox-Add-support-for-the-new-VBG_IOCTL_ACQUIRE_.patch
	b882267b001351639deca2e600ddb3bdfb18c1872cda0e349481d93430651d87) # sha256sums

##  6db0483ead5e04dabf5dbf647d3c3a2b18de8288adb94428e6f48b06ef15dcdc  linux-lts54-5.4.254-01-x86_64.pkg.tar.lz
##  18b60e8eadc236e73a915989229503cdd029a1df08b53981e77110cd2b466747  linux-lts54-headers-5.4.254-01-x86_64.pkg.tar.lz