# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
#
# shellcheck disable=SC2034

EAPI=7

DESCRIPTION="Fast, dense and secure container management"
HOMEPAGE="https://linuxcontainers.org/lxd/introduction/ https://github.com/lxc/lxd"

# TODO(crbug/1097610) tremplin requires that someone install the lxd client
# library. Currently this is done in the 3.17 ebuild, but when this becomes the
# main ebuild it will need to be moved here.
CROS_GO_PACKAGES=(
)

CROS_GO_WORKSPACE="${S}/_dist"
EGO_PN="github.com/lxc/lxd"
BIN_PATH="/opt/google/lxd-next/usr/bin"
CROS_GO_BINARIES=(
	"${EGO_PN}/lxd:${BIN_PATH}/lxd"
	"${EGO_PN}/fuidshift:${BIN_PATH}/fuidshift"
	"${EGO_PN}/lxd-agent:${BIN_PATH}/lxd-agent"
	"${EGO_PN}/lxd-benchmark:${BIN_PATH}/lxd-benchmark"
	"${EGO_PN}/lxd-p2c:${BIN_PATH}/lxd-p2c"
	"${EGO_PN}/lxc:${BIN_PATH}/lxc"
	"${EGO_PN}/lxc-to-lxd:${BIN_PATH}/lxc-to-lxd"
)

# Needs to include licenses for all bundled programs and libraries.
LICENSE="Apache-2.0 BSD BSD-2 LGPL-3 MIT MPL-2.0"
SLOT="4"
KEYWORDS="*"

IUSE="apparmor ipv6 nls verify-sig"

inherit autotools bash-completion-r1 linux-info optfeature systemd verify-sig cros-go user

SRC_URI="https://linuxcontainers.org/downloads/lxd/${P}.tar.gz
	verify-sig? ( https://linuxcontainers.org/downloads/lxd/${P}.tar.gz.asc )"

DEPEND="app-arch/xz-utils
	>=app-emulation/lxc-3.0.0:4[apparmor?,seccomp(+)]
	dev-db/sqlite
	dev-libs/libuv
	dev-libs/lzo
	net-dns/dnsmasq[dhcp,ipv6?]
	virtual/libudev"
RDEPEND="${DEPEND}
	net-firewall/ebtables
	net-firewall/iptables[ipv6?]
	sys-apps/iproute2[ipv6?]
	sys-fs/fuse:0=
	sys-fs/lxcfs:4
	sys-fs/squashfs-tools[lzma]
	virtual/acl"
BDEPEND="dev-lang/go
	nls? ( sys-devel/gettext )
	verify-sig? ( app-crypt/openpgp-keys-linuxcontainers )"

CONFIG_CHECK="
	~CGROUPS
	~IPC_NS
	~NET_NS
	~PID_NS

	~SECCOMP
	~USER_NS
	~UTS_NS
"

ERROR_IPC_NS="CONFIG_IPC_NS is required."
ERROR_NET_NS="CONFIG_NET_NS is required."
ERROR_PID_NS="CONFIG_PID_NS is required."
ERROR_SECCOMP="CONFIG_SECCOMP is required."
ERROR_UTS_NS="CONFIG_UTS_NS is required."

VERIFY_SIG_OPENPGP_KEY_PATH=${BROOT}/usr/share/openpgp-keys/linuxcontainers.asc

src_unpack() {
	unpack "${A}"
	cd "${S}" || die

	# Instead of using the lxd symlink in the dist directory, move the lxd
	# source into that directory. Otherwise, the cros-go_src_install stage
	# will fail since it won't traverse symlinks.
	rm "${S}/_dist/src/${EGO_PN}"
	mkdir "${S}/_dist/src/${EGO_PN}"
	find "${S}"/* -maxdepth 0 \
				-type d \
				! -name "_dist" \
				-exec mv {} "${S}/_dist/src/${EGO_PN}" \;
}

src_configure() {
	DEPS="${S}/_dist/deps"

	cd "${DEPS}/raft" || die "Can't cd to raft dir"
	eautoreconf
	econf --enable-static=no

	cd "${DEPS}/dqlite" || die "Can't cd to dqlite dir"
	export RAFT_CFLAGS="-I${DEPS}/raft/include/"
	export RAFT_LIBS="${DEPS}/raft/.libs"
	eautoreconf
	econf --enable-static=no
}

src_compile() {
	DEPS="${S}/_dist/deps"

	cd "${DEPS}/raft" || die "Can't cd to raft dir"
	emake

	cd "${DEPS}/dqlite" || die "Can't cd to dqlite dir"
	emake

	cd "${S}" || die

	# Taken from the output of make deps
	export CGO_CFLAGS="-I${DEPS}/raft/include/ -I${DEPS}/dqlite/include/"
	export CGO_LDFLAGS="-L${DEPS}/raft/.libs -L${DEPS}/dqlite/.libs/"
	export LD_LIBRARY_PATH="${DEPS}/raft/.libs/:${DEPS}/dqlite/.libs/"
	export CGO_LDFLAGS_ALLOW="-Wl,-wrap,pthread_create"

	# TODO(crbug/1097610) Because we're installing everything to different
	# paths, we need to tell pkg-config and cgo where to find it. This can
	# be removed when we commit to LXD 4.0
	install_root="${SYSROOT}/opt/google/lxd-next"
	export PKG_CONFIG_LIBDIR="${install_root}/$(get_libdir)/pkgconfig:${SYSROOT}/$(get_libdir)/pkgconfig"
	export PKG_CONFIG_SYSROOT_DIR="${SYSROOT}"
	export PKG_CONFIG="/usr/bin/pkg-config"
	export CGO_CFLAGS="${CGO_CFLAGS} -I${install_root}/include"
	export CGO_LDFLAGS="${CGO_LDFLAGS} -L${install_root}/$(get_libdir)"

	cros-go_src_compile

	if use nls; then
		cd "${S}/_dist/src/${EGO_PN}" || die
		emake -f "${S}/Makefile" build-mo
	fi
}

src_test() {
	DEPS="${S}/_dist/deps"

	# Taken from the output of make deps
	export CGO_CFLAGS="-I${DEPS}/raft/include/ -I${DEPS}/dqlite/include/"
	export CGO_LDFLAGS="-L${DEPS}/raft/.libs -L${DEPS}/dqlite/.libs/"
	export LD_LIBRARY_PATH="${DEPS}/raft/.libs/:${DEPS}/dqlite/.libs/"
	export CGO_LDFLAGS_ALLOW="-Wl,-wrap,pthread_create"

	# TODO(sidereal) would be nice to enable more tests here
	cros_go test -v ${EGO_PN}/lxd || die
}

src_install() {
	cros-go_src_install

	DEPS="${S}/_dist/deps"

	cd "${DEPS}/raft" || die
	emake DESTDIR="${D}/opt/google/lxd-next" install

	cd "${DEPS}/dqlite" || die
	emake DESTDIR="${D}/opt/google/lxd-next" install

	cd "${S}" || die
	newbashcomp "${S}/_dist/src/${EGO_PN}/scripts/bash/lxd-client" lxc

	dodoc AUTHORS _dist/src/${EGO_PN}/doc/*
	use nls && domo "${S}/_dist/src/${EGO_PN}/po/"*.mo

	# TODO(crbug/1097610) Remove this once we no longer need to do weird
	# things with PATH
	insinto /etc/bash/bashrc.d
	newins "${FILESDIR}/${P}-set-path.sh" ".set-path-for-lxd-next.sh"
	newins "$(mktemp)" "set-path-for-lxd-next.sh"
}

pkg_postinst() {
	cros-go_pkg_postinst

	# The control socket will be owned by (and writeable by) this group.
	enewgroup lxd

	elog
	elog "Consult https://wiki.gentoo.org/wiki/LXD for more information,"
	elog "including a Quick Start."
	elog
	elog "Please run 'lxc-checkconfig' to see all optional kernel features."
	elog
	elog "Optional features:"
	optfeature "btrfs storage backend" sys-fs/btrfs-progs
	optfeature "lvm2 storage backend" sys-fs/lvm2
	optfeature "zfs storage backend" sys-fs/zfs
	elog
	elog "Be sure to add your local user to the lxd group."
}