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

pkgbase=linux6.1  # change in naming convention so the following versions will match this pattern
pkgver=6.1.37
pkgrel=01
pkgdesc="Linux LTS 6.1 kernel w/ joborun config HAVE_RUST no ipv6 no zstd no IFS no"
_srcname=linux-$pkgver
##  In anticipation that this will be the next lts we are building it to replace our own linux 5.15 pkg
##  linux-lts 5.10 will remain for a while as our default primary kernel 
url="https://kernel.org/"
makedepends=(bc libelf pahole cpio perl tar xz kmod 
  xmlto python-sphinx graphviz imagemagick)
 # for docs pkg : texlive-latexextra git)
options=('!strip')
source=(
  https://cdn.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/${_srcname}.tar.{xz,sign}
  config         # the main kernel config file
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
  sha256sums::https://cdn.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc)

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 all ##  Add this into the build to make docs and uncomment the package section

_package() {
  pkgdesc="The $pkgdesc"
  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 KSMBD-MODULE)
  replaces=(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"
  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}

#  # 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 "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
	A2FF3A36AAA56654109064AB19802F8B0D70FC30)  # Jan Alexander Steffens (heftig)

# https://cdn.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc  --> sha256sums
# 46cad712d261a23c8e483a3b79b6a84b9a5f731a8921c9127df35ae35cef1e80  linux-6.1.37.tar.xz

sha256sums=(46cad712d261a23c8e483a3b79b6a84b9a5f731a8921c9127df35ae35cef1e80  # linux-6.1.37.tar.xz
	fa571e221d883633795c2703b0360a31d8fc0e91454d72781e6c61d7a7d93186  # linux-6.1.37.tar.sign
	fa5843d2f1dda98be761ac4e29462295f21944e8b57c7750667b21b77e42bd6d  # config
	1bd8388fcb6ed4eec46450c65eb7a0889a8c541f164a39e3064633981a7a4a3d  # 0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
	5cf0d6d1f912e52ddd63ccf946c0ea3b2d9259aead669d034c09a5455dc484bc) # sha256sums


##  a3a1038677930824c149b4ddb61833f9514d1f2db67011d36fb78031a39e5685  linux6.1-6.1.37-01-x86_64.pkg.tar.lz
##  fe4af354f2b7654ecebc933cbe6a516d094759447a6bfdf657efdfcdf7833f3e  linux6.1-headers-6.1.37-01-x86_64.pkg.tar.lz