# Copyright 1999-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

EAPI=6

PYTHON_COMPAT=( python3_{4,5,6} )
DISTUTILS_OPTIONAL=1

inherit autotools bash-completion-r1 distutils-r1 linux-info versionator flag-o-matic systemd readme.gentoo-r1
DESCRIPTION="LinuX Containers userspace utilities"
HOMEPAGE="https://linuxcontainers.org/"
SRC_URI="https://linuxcontainers.org/downloads/lxc/${P}.tar.gz"

KEYWORDS="amd64 ~arm ~arm64 ppc64 x86"

LICENSE="LGPL-3"
SLOT="0"
IUSE="cgmanager checkpoint examples lua python seccomp selinux systemd"

RDEPEND="
	net-libs/gnutls
	sys-libs/libcap
	cgmanager? ( app-admin/cgmanager )
	lua? ( >=dev-lang/lua-5.1:= )
	python? ( ${PYTHON_DEPS} )
	seccomp? ( sys-libs/libseccomp )
	selinux? ( sys-libs/libselinux )"

DEPEND="${RDEPEND}
	app-text/docbook-sgml-utils
	>=sys-kernel/linux-headers-3.2"

RDEPEND="${RDEPEND}
	checkpoint? ( sys-process/criu )
	sys-apps/util-linux
	app-misc/pax-utils
	virtual/awk"

CONFIG_CHECK="~CGROUPS ~CGROUP_DEVICE
	~CPUSETS ~CGROUP_CPUACCT
	~CGROUP_SCHED

	~NAMESPACES
	~IPC_NS ~USER_NS ~PID_NS

	~NETLINK_DIAG ~PACKET_DIAG
	~INET_UDP_DIAG ~INET_TCP_DIAG
	~UNIX_DIAG ~CHECKPOINT_RESTORE

	~CGROUP_FREEZER
	~UTS_NS ~NET_NS
	~VETH ~MACVLAN

	~POSIX_MQUEUE
	~!NETPRIO_CGROUP

	~!GRKERNSEC_CHROOT_MOUNT
	~!GRKERNSEC_CHROOT_DOUBLE
	~!GRKERNSEC_CHROOT_PIVOT
	~!GRKERNSEC_CHROOT_CHMOD
	~!GRKERNSEC_CHROOT_CAPS
	~!GRKERNSEC_PROC
	~!GRKERNSEC_SYSFS_RESTRICT
"

ERROR_DEVPTS_MULTIPLE_INSTANCES="CONFIG_DEVPTS_MULTIPLE_INSTANCES:  needed for pts inside container"

ERROR_CGROUP_FREEZER="CONFIG_CGROUP_FREEZER:  needed to freeze containers"

ERROR_UTS_NS="CONFIG_UTS_NS:  needed to unshare hostnames and uname info"
ERROR_NET_NS="CONFIG_NET_NS:  needed for unshared network"

ERROR_VETH="CONFIG_VETH:  needed for internal (host-to-container) networking"
ERROR_MACVLAN="CONFIG_MACVLAN:  needed for internal (inter-container) networking"

ERROR_NETLINK_DIAG="CONFIG_NETLINK_DIAG:  needed for lxc-checkpoint"
ERROR_PACKET_DIAG="CONFIG_PACKET_DIAG:  needed for lxc-checkpoint"
ERROR_INET_UDP_DIAG="CONFIG_INET_UDP_DIAG:  needed for lxc-checkpoint"
ERROR_INET_TCP_DIAG="CONFIG_INET_TCP_DIAG:  needed for lxc-checkpoint"
ERROR_UNIX_DIAG="CONFIG_UNIX_DIAG:  needed for lxc-checkpoint"
ERROR_CHECKPOINT_RESTORE="CONFIG_CHECKPOINT_RESTORE:  needed for lxc-checkpoint"

ERROR_POSIX_MQUEUE="CONFIG_POSIX_MQUEUE:  needed for lxc-execute command"

ERROR_NETPRIO_CGROUP="CONFIG_NETPRIO_CGROUP:  as of kernel 3.3 and lxc 0.8.0_rc1 this causes LXCs to fail booting."

ERROR_GRKERNSEC_CHROOT_MOUNT="CONFIG_GRKERNSEC_CHROOT_MOUNT:  some GRSEC features make LXC unusable see postinst notes"
ERROR_GRKERNSEC_CHROOT_DOUBLE="CONFIG_GRKERNSEC_CHROOT_DOUBLE:  some GRSEC features make LXC unusable see postinst notes"
ERROR_GRKERNSEC_CHROOT_PIVOT="CONFIG_GRKERNSEC_CHROOT_PIVOT:  some GRSEC features make LXC unusable see postinst notes"
ERROR_GRKERNSEC_CHROOT_CHMOD="CONFIG_GRKERNSEC_CHROOT_CHMOD:  some GRSEC features make LXC unusable see postinst notes"
ERROR_GRKERNSEC_CHROOT_CAPS="CONFIG_GRKERNSEC_CHROOT_CAPS:  some GRSEC features make LXC unusable see postinst notes"
ERROR_GRKERNSEC_PROC="CONFIG_GRKERNSEC_PROC:  this GRSEC feature is incompatible with unprivileged containers"
ERROR_GRKERNSEC_SYSFS_RESTRICT="CONFIG_GRKERNSEC_SYSFS_RESTRICT:  this GRSEC feature is incompatible with unprivileged containers"

DOCS=(AUTHORS CONTRIBUTING MAINTAINERS NEWS README doc/FAQ.txt)

REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"

pkg_setup() {
	kernel_is -lt 4 7 && CONFIG_CHECK="${CONFIG_CHECK} ~DEVPTS_MULTIPLE_INSTANCES"
	linux-info_pkg_setup
}

src_prepare() {
	eapply "${FILESDIR}"/${PN}-2.0.6-bash-completion.patch
	#558854
	eapply "${FILESDIR}"/${PN}-2.0.5-omit-sysconfig.patch
	eapply "${FILESDIR}"/${PN}-2.1.1-fix-cgroup2-detection.patch
	eapply "${FILESDIR}"/${PN}-2.1.1-cgroups-enable-container-without-CAP_SYS_ADMIN.patch
	eapply_user
	eautoreconf
}

src_configure() {
	append-flags -fno-strict-aliasing

	if use python; then
		#541932
		python_setup "python3*"
		export PKG_CONFIG_PATH="${T}/${EPYTHON}/pkgconfig:${PKG_CONFIG_PATH}"
	fi

	# I am not sure about the --with-rootfs-path
	# /var/lib/lxc is probably more appropriate than
	# /usr/lib/lxc.
	# Note by holgersson: Why is apparmor disabled?

	# --enable-doc is for manpages which is why we don't link it to a "doc"
	# USE flag. We always want man pages.
	econf \
		--localstatedir=/var \
		--bindir=/usr/bin \
		--sbindir=/usr/bin \
		--with-config-path=/etc/lxc	\
		--with-rootfs-path=/var/lib/lxc/rootfs \
		--with-distro=gentoo \
		--with-runtime-path=/var/run \
		--disable-apparmor \
		--disable-werror \
		--enable-doc \
		$(use_enable cgmanager) \
		$(use_enable examples) \
		$(use_enable lua) \
		$(use_enable python) \
		$(use_enable seccomp) \
		$(use_enable selinux)
}

python_compile() {
	distutils-r1_python_compile build_ext -I.. -L../lxc/.libs --no-pkg-config
}

src_compile() {
	default

	if use python; then
		pushd "${S}/src/python-${PN}" > /dev/null
		distutils-r1_src_compile
		popd > /dev/null
	fi
}

src_install() {
	default

	mv "${ED}"/usr/share/bash-completion/completions/${PN} "${ED}"/$(get_bashcompdir)/${PN}-start || die
	# start-ephemeral is no longer a command but removing it here
	# generates QA warnings (still in upstream completion script)
	bashcomp_alias ${PN}-start \
		${PN}-{attach,cgroup,copy,console,create,destroy,device,execute,freeze,info,monitor,snapshot,start-ephemeral,stop,unfreeze,wait}

	if use python; then
		pushd "${S}/src/python-lxc" > /dev/null
		# Unset DOCS. This has been handled by the default target
		unset DOCS
		distutils-r1_src_install
		popd > /dev/null
	fi

	keepdir /etc/lxc /var/lib/lxc/rootfs /var/log/lxc

	find "${D}" -name '*.la' -delete

	# Gentoo-specific additions!
	newinitd "${FILESDIR}/${PN}.initd.7" ${PN}

	# Remember to compare our systemd unit file with the upstream one
	# config/init/systemd/lxc.service.in
	use systemd && systemd_newunit "${FILESDIR}"/${PN}_at.service.4 "lxc@.service"

	DOC_CONTENTS="
	Starting from version ${PN}-1.1.0-r3, the default lxc path has been
	moved from /etc/lxc to /var/lib/lxc.
	However, this particular package restores /etc/lxc as the default
	configuration path.
	If you still want to use /var/lib/lxc please add the following to
	your /etc/lxc/lxc.conf

	  lxc.lxcpath = /var/lib/lxc

	For openrc, there is an init script provided with the package.
	You _should_ only need to symlink /etc/init.d/lxc to
	/etc/init.d/lxc.configname to start the container defined in
	/etc/lxc/configname.conf."

	use systemd && DOC_CONTENTS+="

	Correspondingly, for systemd a service file lxc@.service is installed.
	Enable and start lxc@configname in order to start the container defined
	in /etc/lxc/configname.conf."

	DOC_CONTENTS+="

	If you want checkpoint/restore functionality, please install criu
	(sys-process/criu)."
	DISABLE_AUTOFORMATTING=true
	readme.gentoo_create_doc
}

pkg_postinst() {
	readme.gentoo_print_elog
}