PKGBUILD


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# Maintainer: Vladimir Stoiakin <VStoiakin at lavabit dot com>

pkgbase=linux-librem5
pkgname=(
  "$pkgbase"
  "$pkgbase-docs"
)
pkgver=6.6.40
pkgrel=1
pkgdesc='The Linux kernel for Purism Librem 5'
url='https://source.puri.sm/Librem5/linux'
arch=('aarch64')
license=(GPL-2.0-only)
makedepends=(
  bc
  cpio
  gettext
  libelf
  pahole
  perl
  python
  tar
  xz

  # htmldocs
  graphviz
  imagemagick
  python-sphinx
  python-yaml
  texlive-latexextra
)
options=(
  !debug
  !strip
)

_purismver=6.6.40pureos2
source=(https://source.puri.sm/Librem5/linux/-/archive/pureos/$_purismver/linux-pureos-$_purismver.tar.gz)
sha256sums=('197f61667610c8bb426b1792fc97f21305e2eaf3328595a3dff61e19753f7b17')
b2sums=('a6de14451e88cabd62ce1a90f3aaa217b11c3b8cdfa6bb155f2cbededf3a20c7d0a2ad89b67dcb4acb396624f351642d426ec0924c24ab52dbedc6642b7aa7f5')

export ARCH=arm64
export KBUILD_BUILD_HOST=archlinux
export KBUILD_BUILD_USER=$pkgbase
if [[ $(uname -m) != 'aarch64' ]]; then
    makedepends+=( aarch64-linux-gnu-gcc )
    export CARCH=aarch64
    export CROSS_COMPILE=aarch64-linux-gnu-
fi
export KCFLAGS="-mtune=cortex-a53"

prepare() {
  cd linux-pureos-$_purismver

  echo "Setting version..."
  echo "-$pkgrel" > localversion.10-pkgrel

  echo "Setting config..."
  make librem5_defconfig

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

build() {
  cd linux-pureos-$_purismver
  make all
  make htmldocs
}

package_linux-librem5() {
  depends=(
    coreutils
    initramfs
    kmod
  )
  optdepends=(
    'wireless-regdb: to set the correct wireless channels of your country'
    'linux-firmware: firmware images needed for some devices'
  )

  cd linux-pureos-$_purismver
  local modulesdir="$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

  echo "Installing DTBs..."
  install -Dm644 -t "$pkgdir/boot" "arch/arm64/boot/dts/freescale/imx8mq-librem5-r"*".dtb"

  # remove build link
  rm "$modulesdir"/build
}

package_linux-librem5-docs() {
  pkgdesc="$pkgdesc (documentation)"

  cd linux-pureos-$_purismver
  local builddir="$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"
}