# Copyright 1999-2015 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

EAPI="5"

MY_P="${P/_/-}"
PYTHON_COMPAT=( python{3_3,3_4} )
DISTUTILS_OPTIONAL=1

inherit autotools bash-completion-r1 distutils-r1 eutils linux-info versionator flag-o-matic systemd

DESCRIPTION="LinuX Containers userspace utilities"
HOMEPAGE="https://linuxcontainers.org/"
SRC_URI="https://github.com/lxc/lxc/archive/${MY_P}.tar.gz"

KEYWORDS="amd64 ~arm ~arm64 ppc64 x86"

LICENSE="LGPL-3"
SLOT="0"
IUSE="doc examples lua python seccomp"

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

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

RDEPEND="${RDEPEND}
	sys-apps/util-linux
	app-misc/pax-utils
	virtual/awk"

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

	~NAMESPACES
	~IPC_NS ~USER_NS ~PID_NS

	~DEVPTS_MULTIPLE_INSTANCES
	~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
"

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_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"

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

S="${WORKDIR}/${PN}-${MY_P}"

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

src_prepare() {
	sed -i 's/AM_CONFIG_HEADER/AC_CONFIG_HEADERS/g' configure.ac || die
	if [[ -n ${BACKPORTS} ]]; then
		epatch "${WORKDIR}"/patches/*
	fi

	epatch "${FILESDIR}"/${PN}-1.0.6-bash-completion.patch

	eautoreconf
}

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

	econf \
		--localstatedir=/var \
		--bindir=/usr/sbin \
		--docdir=/usr/share/doc/${PF} \
		--with-config-path=/etc/lxc	\
		--with-rootfs-path=/usr/lib/lxc/rootfs \
		--with-distro=gentoo \
		$(use_enable doc) \
		--disable-apparmor \
		$(use_enable examples) \
		$(use_enable lua) \
		$(use_enable seccomp) \
		--disable-python
}

python_compile() {
	distutils-r1_python_compile build_ext -I ../ -L ../${PN}
}

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
	bashcomp_alias ${PN}-start \
		${PN}-{attach,cgroup,clone,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 /usr/lib/lxc/rootfs /var/log/lxc

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

	# Gentoo-specific additions!
	# Use initd.3 per #517144
	newinitd "${FILESDIR}/${PN}.initd.3" ${PN}

	# lxc-devsetup script
	exeinto /usr/libexec/${PN}
	doexe config/init/systemd/${PN}-devsetup
	# Use that script with the systemd service (Similar to upstream
	# Makefile.am
	cp "${FILESDIR}"/${PN}_at.service ${PN}_at.service || die
	sed -i \
		"/Restart=always/a ExecStartPre=/usr/libexec/${PN}/${PN}-devsetup" \
		${PN}_at.service \
		|| die "Failed to add ${PN}-devsetup to the systemd service file"
	systemd_newunit ${PN}_at.service "lxc@.service"
}

pkg_postinst() {
	elog "There is an init script provided with the package now; no documentation"
	elog "is currently available though, so please check out /etc/init.d/lxc ."
	elog "You _should_ only need to symlink it to /etc/init.d/lxc.configname"
	elog "to start the container defined into /etc/lxc/configname.conf ."
	elog "For further information about LXC development see"
	elog "http://blog.flameeyes.eu/tag/lxc" # remove once proper doc is available
	elog ""
	ewarn "With version 0.7.4, the mountpoint syntax came back to the one used by 0.7.2"
	ewarn "and previous versions. This means you'll have to use syntax like the following"
	ewarn ""
	ewarn "    lxc.rootfs = /container"
	ewarn "    lxc.mount.entry = /usr/portage /container/usr/portage none bind 0 0"
	ewarn ""
	ewarn "To use the Fedora, Debian and (various) Ubuntu auto-configuration scripts, you"
	ewarn "will need sys-apps/yum or dev-util/debootstrap."
	ewarn ""
	ewarn "Some GrSecurity settings in relation to chroot security will cause LXC not to"
	ewarn "work, while others will actually make it much more secure. Please refer to"
	ewarn "Diego Elio Pettenò's weblog at http://blog.flameeyes.eu/tag/lxc for further"
	ewarn "details."
}