# Contributor: Stefan Reimer <stefan@zero-downtime.net>
# Maintainer: Stefan Reimer <stefan@zero-downtime.net>
_flavor=lts
_extra_flavors=virt

pkgver=0.37.1
pkgrel=0
pkgname=falco-kernel-$_flavor
pkgdesc="Falco kernel module"
url="https://github.com/falcosecurity/falco"
arch="x86_64 aarch64"
license="AGPL-3.0"
makedepends="cmake linux-$_flavor-dev linux-headers"
             # protobuf-dev jq-dev openssl-dev curl-dev c-ares-dev grpc-dev yaml-dev yaml-cpp-dev jsoncpp-dev re2-dev"
             # perl autoconf elfutils-dev libtool argp-standalone musl-fts-dev musl-libintl musl-obstack-dev"
options="!check"

source="
  falco-$pkgver.tar.gz::https://github.com/falcosecurity/falco/archive/refs/tags/$pkgver.tar.gz
  "
builddir="$srcdir/falco-$pkgver"

for f in $_extra_flavors; do
        makedepends="$makedepends linux-$f-dev"
        subpackages="$subpackages falco-kernel-$f:_extra"
done

build() {
  for flavor in $_flavor $_extra_flavors; do
    mkdir -p $srcdir/falco-$pkgver/build-$flavor

    # Hack running the build inside a container other uname -r returns host kernel
    KERNEL_VERSION=$(basename $(ls -d /lib/modules/*-"$flavor"))

    cd $srcdir/falco-$pkgver/build-$flavor
    cmake .. \
      -DCMAKE_BUILD_TYPE=Release \
      -DFALCO_VERSION=$pkgver \
      -DCMAKE_INSTALL_PREFIX=/usr \
      -DUSE_BUNDLED_DEPS=On \
      -DMUSL_OPTIMIZED_BUILD=On

    KERNELDIR=/lib/modules/$KERNEL_VERSION/build make driver
  done
}

_package() {
  local flavor=$1
  local _out=$2

  KERNEL_VERSION=$(basename $(ls -d /lib/modules/*-"$flavor"))
  depends="linux-$flavor~$(echo $KERNEL_VERSION | sed -e 's/-.*$//')"

  cd $srcdir/falco-$pkgver/build-$flavor
  mkdir -p "$_out"/lib/modules/$KERNEL_VERSION/kernel
  gzip -9 -c driver/falco.ko > "$_out"/lib/modules/$KERNEL_VERSION/kernel/falco.ko.gz 
}

package() {
  _package $_flavor $pkgdir
}

_extra() {
  flavor=${subpkgname##*-}

  _package $flavor $subpkgdir
}

sha512sums="
257d526c4d3eadbe2c79852221fdb8076f94e421aa66753628770ae7384137b4672064cbe1ba0a4d88d14e8a7d08e2521d5bd82a312c4b1442d8ea6fbbbb2f28  falco-0.37.1.tar.gz
"