app-containers/waydroid: Added more kernel checks

* CONFIG_NETFILTER_XT_TARGET_MASQUERADE
* CONFIG_NETFILTER_XT_NAT

Closes: https://bugs.gentoo.org/937106
Signed-off-by: Denis Reva <denis7774@gmail.com>

app-containers/waydroid/waydroid-1.4.2-r2.ebuild

@@ -0,0 +1,96 @@
+# Copyright 2022-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..12} )
+inherit linux-info xdg python-single-r1
+
+DESCRIPTION="Container-based approach to boot a full Android system on Linux systems"
+HOMEPAGE="https://waydro.id"
+SRC_URI="https://github.com/${PN}/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="GPL-3"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~x86"
+REQUIRED_USE="${PYTHON_REQUIRED_USE}"
+IUSE="apparmor +clipboard systemd"
+
+DEPEND="|| ( virtual/linux-sources virtual/dist-kernel )"
+RDEPEND="
+	systemd? ( sys-apps/systemd )
+	app-containers/lxc[systemd?,apparmor?,seccomp]
+	$(python_gen_cond_dep '
+		clipboard? ( >=dev-python/pyclip-0.7.0[wayland,${PYTHON_USEDEP}] )
+		dev-python/pygobject[${PYTHON_USEDEP}]
+		>=dev-python/gbinder-1.1.1[${PYTHON_USEDEP}]
+		dev-python/dbus-python[${PYTHON_USEDEP}]
+	')
+	net-firewall/nftables
+	net-dns/dnsmasq
+	>=dev-libs/libglibutil-1.0.67
+	>=dev-libs/gbinder-1.1.21
+	${PYTHON_DEPS}
+"
+
+CONFIG_CHECK="
+	~ANDROID_BINDER_IPC
+	~ANDROID_BINDERFS
+	~MEMFD_CREATE
+	~NETFILTER_XT_TARGET_MASQUERADE
+	~NETFILTER_XT_NAT
+"
+ERROR_ANDROID_BINDERFS="CONFIG_ANDROID_BINDERFS: need for creating Android-specific binder IPC channels"
+ERROR_ANDROID_BINDER_IPC="CONFIG_ANDROID_BINDER_IPC: need for creating Android-specific binder IPC channels"
+ERROR_MEMFD_CREATE="CONFIG_MEMFD_CREATE: it completely replaced deprecated ISHMEM drivers,
+	therefore it's vital for android-specific memory management"
+ERROR_NETFILTER_XT_NAT="CONFIG_NETFILTER_XT_NAT: see bug #937106"
+ERROR_NETFILTER_XT_TARGET_MASQUERADE="CONFIG_NETFILTER_XT_TARGET_MASQUERADE: see bug #937106"
+
+
+pkg_setup() {
+	linux-info_pkg_setup
+	python-single-r1_pkg_setup
+}
+
+src_prepare() {
+	if ! use apparmor; then
+		# https://github.com/waydroid/waydroid/issues/652
+		sed -e '/^lxc\.apparmor\.profile =/d' \
+			-i data/configs/config_3 || die
+	fi
+	default
+}
+
+src_install() {
+	python_fix_shebang waydroid.py
+	emake install DESTDIR="${D}" USE_NFTABLES=1 USE_SYSTEMD=$(usex systemd 1 0)
+	if ! use systemd; then
+		elog "Installing waydroid OpenRC daemon"
+		doinitd "${FILESDIR}"/waydroid
+	fi
+}
+
+pkg_postinst() {
+	xdg_pkg_postinst
+
+	elog "After package installation run either 'emerge --config app-containers/waydroid'"
+	elog "or 'waydroid init' from root shell to install android container runtime"
+	elog "To run waydroid, 1. Start container: 'rc-service waydroid start'"
+	elog "2. start wayland channel (from user shell) 'waydroid session start'"
+	elog "Contact https://docs.waydro.id/usage/install-on-desktops for how-to guides"
+	elog "(does not cover Gentoo-specific things sadly)"
+	elog
+
+	ewarn "Make sure you have NFTABLES up and running in your kernel. See"
+	ewarn "https://wiki.gentoo.org/wiki/Nftables for how-to details"
+	ewarn
+
+	if use apparmor; then
+		ewarn "Apparmor support has not been tested by package maintainer yet"
+	fi
+}
+
+pkg_config() {
+	"${EROOT}"/usr/bin/waydroid init
+}