PKGBUILD


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# Maintainer: Florian Mounier <paradoxxx.zero at gmail dot com>

# This package rebuild only the i915 module with this patch applied: https://gitlab.freedesktop.org/drm/intel/-/issues/1627
# Must use --overwrite "*/i915.ko.zst" as it replaces the module, for a lack of a better solution

pkgname=linux-i915-module-patched
pkgbase=linux-i915-module-patched
# pkgver=$(curl --silent "https://api.github.com/repos/archlinux/linux/tags" | grep name | head -n 1 | sed -E 's/.*"v([^"]+)".*/\1/')
pkgver=$(curl --silent https://raw.githubusercontent.com/archlinux/svntogit-packages/master/linux/trunk/PKGBUILD | grep pkgver= | sed -E 's/pkgver=//')
pkgrel=1
pkgdesc='Linux i915 module with this patch applied: https://gitlab.freedesktop.org/drm/intel/-/issues/1627 /!\\ Must use --overwrite "*/i915.ko.zst" as it replaces the module '
_srctag=v${pkgver%.*}-${pkgver##*.}
url="https://github.com/archlinux/linux/commits/$_srctag"
arch=(x86_64)
license=(GPL2)
makedepends=(
  bc kmod libelf pahole cpio perl tar xz
  xmlto python-sphinx python-sphinx_rtd_theme graphviz imagemagick
  git
)
options=('!strip')
_srcname=archlinux-linux
source=(
  "$_srcname::git+https://github.com/archlinux/linux?signed#tag=$_srctag"
  patch.patch
)
validpgpkeys=(
  'ABAF11C65A2970B130ABE3C479BE3E4300411886'  # Linus Torvalds
  '647F28654894E3BD457199BE38DBBDC86092693E'  # Greg Kroah-Hartman
  'A2FF3A36AAA56654109064AB19802F8B0D70FC30'  # Jan Alexander Steffens (heftig)
  'C7E7849466FE2358343588377258734B41C31549'  # David Runge <dvzrv@archlinux.org>
)
sha256sums=('SKIP'
            'c5e09bf109f6291727cdd4ba65f0d8160656026ec3a87f9549ebef7aeff98686')

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..."
  scripts/setlocalversion --save-scmversion
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "" > 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 config..."
  wget -O .config "https://raw.githubusercontent.com/archlinux/svntogit-packages/packages/linux/trunk/config"
  make olddefconfig

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

build() {
  cd $_srcname
  make clean
  make -j8 scripts
  make -j8 prepare
  make -j8 modules_prepare
  make -j8 M=drivers/gpu/drm/i915
}

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

  echo "Installing i915 module... ${src} ${srcdir} ${_srcname} ${pkgdir} "
  zstd -z -19 "./drivers/gpu/drm/i915/i915.ko"
  install -D -m644 "./drivers/gpu/drm/i915/i915.ko.zst" "${modulesdir}/kernel/drivers/gpu/drm/i915/i915.ko.zst"
}