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

EAPI=5

PYTHON_COMPAT=( python2_7 )
PYTHON_REQ_USE='xml,threads'

if [[ $PV == *9999 ]]; then
	KEYWORDS=""
	REPO="xen-unstable.hg"
	EHG_REPO_URI="http://xenbits.xensource.com/${REPO}"
	S="${WORKDIR}/${REPO}"
	live_eclass="mercurial"
else
	KEYWORDS="amd64 x86"
	UPSTREAM_VER=9
	SECURITY_VER=6
	# xen-tools's gentoo patches tarball
	GENTOO_VER=1
	# xen-tools's gentoo patches version which apply to this specific ebuild
	GENTOO_GPV=0
	SEABIOS_VER=1.6.3.2

	[[ -n ${UPSTREAM_VER} ]] && \
		UPSTREAM_PATCHSET_URI="https://dev.gentoo.org/~dlan/distfiles/${P/-tools/}-upstream-patches-${UPSTREAM_VER}.tar.xz"
	[[ -n ${SECURITY_VER} ]] && \
		SECURITY_PATCHSET_URI="https://dev.gentoo.org/~dlan/distfiles/${PN/-tools}-security-patches-${SECURITY_VER}.tar.xz"
	[[ -n ${GENTOO_VER} ]] && \
		GENTOO_PATCHSET_URI="https://dev.gentoo.org/~dlan/distfiles/${PN/-tools/}-gentoo-patches-${GENTOO_VER}.tar.xz"

	SRC_URI="http://bits.xensource.com/oss-xen/release/${PV}/xen-${PV}.tar.gz
	http://code.coreboot.org/p/seabios/downloads/get/seabios-${SEABIOS_VER}.tar.gz
	https://dev.gentoo.org/~dlan/distfiles/seabios-${SEABIOS_VER}.tar.gz
	${UPSTREAM_PATCHSET_URI}
	${SECURITY_PATCHSET_URI}
	${GENTOO_PATCHSET_URI}"
	S="${WORKDIR}/xen-${PV}"
fi

inherit bash-completion-r1 eutils flag-o-matic multilib python-single-r1 toolchain-funcs udev ${live_eclass}

DESCRIPTION="Xend daemon and tools"
HOMEPAGE="http://xen.org/"
DOCS=( README docs/README.xen-bugtool )

LICENSE="GPL-2"
SLOT="0"
IUSE="api custom-cflags debug doc flask hvm qemu ocaml pygrub screen static-libs system-seabios"

REQUIRED_USE="hvm? ( qemu )
	${PYTHON_REQUIRED_USE}"

DEPEND="dev-libs/lzo:2
	dev-libs/glib:2
	dev-libs/yajl
	dev-libs/libgcrypt:0
	dev-python/lxml[${PYTHON_USEDEP}]
	dev-python/pypam[${PYTHON_USEDEP}]
	sys-libs/zlib
	sys-power/iasl
	system-seabios? ( sys-firmware/seabios )
	sys-firmware/ipxe
	dev-ml/findlib
	hvm? ( media-libs/libsdl )
	${PYTHON_DEPS}
	api? ( dev-libs/libxml2
		net-misc/curl )
	${PYTHON_DEPS}
	pygrub? ( ${PYTHON_DEPS//${PYTHON_REQ_USE}/ncurses} )
	sys-devel/bin86
	sys-devel/dev86
	dev-lang/perl
	app-misc/pax-utils
	doc? (
		app-doc/doxygen
		dev-tex/latex2html[png,gif]
		media-gfx/transfig
		media-gfx/graphviz
		dev-tex/xcolor
		dev-texlive/texlive-latexextra
		virtual/latex-base
		dev-tex/latexmk
		dev-texlive/texlive-latex
		dev-texlive/texlive-pictures
		dev-texlive/texlive-latexrecommended
	)
	hvm? (  x11-proto/xproto
		!net-libs/libiscsi )"
RDEPEND="sys-apps/iproute2
	net-misc/bridge-utils
	ocaml? ( >=dev-lang/ocaml-4 )
	screen? (
		app-misc/screen
		app-admin/logrotate
	)
	virtual/udev"

# hvmloader is used to bootstrap a fully virtualized kernel
# Approved by QA team in bug #144032
QA_WX_LOAD="usr/lib/xen/boot/hvmloader"

RESTRICT="test"

pkg_setup() {
	python-single-r1_pkg_setup
	export "CONFIG_LOMOUNT=y"

	#bug 522642, disable compile tools/tests
	export "CONFIG_TESTS=n"

	if has_version dev-libs/libgcrypt:0; then
		export "CONFIG_GCRYPT=y"
	fi

	if use qemu; then
		export "CONFIG_IOEMU=y"
	else
		export "CONFIG_IOEMU=n"
	fi

	if [[ -z ${XEN_TARGET_ARCH} ]] ; then
		if use x86 && use amd64; then
			die "Confusion! Both x86 and amd64 are set in your use flags!"
		elif use x86; then
			export XEN_TARGET_ARCH="x86_32"
		elif use amd64 ; then
			export XEN_TARGET_ARCH="x86_64"
		else
			die "Unsupported architecture!"
		fi
	fi

	use api     && export "LIBXENAPI_BINDINGS=y"
	use flask   && export "FLASK_ENABLE=y"
}

src_prepare() {
	# Upstream's patchset
	if [[ -n ${UPSTREAM_VER} ]]; then
		einfo "Try to apply Xen Upstream patcheset"
		EPATCH_SUFFIX="patch" \
		EPATCH_FORCE="yes" \
		EPATCH_OPTS="-p1" \
			epatch "${WORKDIR}"/patches-upstream
	fi

	# Security patchset
	if [[ -n ${SECURITY_VER} ]]; then
		einfo "Try to apply Xen Security patcheset"
		source "${WORKDIR}"/patches-security/${PV}.conf
		# apply main xen patches
		for i in ${XEN_SECURITY_MAIN}; do
			EPATCH_SUFFIX="patch" \
			EPATCH_FORCE="yes" \
				epatch "${WORKDIR}"/patches-security/xen/$i
		done

		# apply qemu-traditional patches
		pushd "${S}"/tools/qemu-xen-traditional/ > /dev/null
		for i in ${XEN_SECURITY_QEMUT}; do
			EPATCH_SUFFIX="patch" \
			EPATCH_FORCE="yes" \
				epatch "${WORKDIR}"/patches-security/qemut/$i
		done
		popd > /dev/null

		# apply qemu-xen/upstream patches
		pushd "${S}"/tools/qemu-xen/ > /dev/null
		for i in ${XEN_SECURITY_QEMUU}; do
			EPATCH_SUFFIX="patch" \
			EPATCH_FORCE="yes" \
				epatch "${WORKDIR}"/patches-security/qemuu/$i
		done
		popd > /dev/null
	fi

	# Gentoo's patchset
	if [[ -n ${GENTOO_VER} && -n ${GENTOO_GPV} ]]; then
		einfo "Try to apply Gentoo specific patcheset"
		source "${FILESDIR}"/gentoo-patches.conf
		_gpv=_gpv_${PN/-/_}_${PV//./}_${GENTOO_GPV}
		for i in ${!_gpv}; do
			EPATCH_SUFFIX="patch" \
			EPATCH_FORCE="yes" \
				epatch "${WORKDIR}"/patches-gentoo/$i
		done
	fi

	use system-seabios && epatch "${WORKDIR}"/patches-gentoo/${PN}-4-unbundle-seabios.patch

	if gcc-specs-pie; then
		epatch "${WORKDIR}"/patches-gentoo/ipxe-nopie.patch
	fi

	# if the user *really* wants to use their own custom-cflags, let them
	if use custom-cflags; then
		einfo "User wants their own CFLAGS - removing defaults"

		# try and remove all the default cflags
		find "${S}" \( -name Makefile -o -name Rules.mk -o -name Config.mk \) \
			-exec sed \
				-e 's/CFLAGS\(.*\)=\(.*\)-O3\(.*\)/CFLAGS\1=\2\3/' \
				-e 's/CFLAGS\(.*\)=\(.*\)-march=i686\(.*\)/CFLAGS\1=\2\3/' \
				-e 's/CFLAGS\(.*\)=\(.*\)-fomit-frame-pointer\(.*\)/CFLAGS\1=\2\3/' \
				-e 's/CFLAGS\(.*\)=\(.*\)-g3*\s\(.*\)/CFLAGS\1=\2 \3/' \
				-e 's/CFLAGS\(.*\)=\(.*\)-O2\(.*\)/CFLAGS\1=\2\3/' \
				-i {} + || die "failed to re-set custom-cflags"
	fi

	if ! use pygrub; then
		sed -e '/^SUBDIRS-$(PYTHON_TOOLS) += pygrub$/d' -i tools/Makefile || die
	fi

	# Disable hvm support on systems that don't support x86_32 binaries.
	if ! use hvm; then
		sed -e '/^CONFIG_IOEMU := y$/d' -i config/*.mk || die
		sed -e '/SUBDIRS-$(CONFIG_X86) += firmware/d' -i tools/Makefile || die
	# Bug 351648
	elif ! use x86 && ! has x86 $(get_all_abis); then
		mkdir -p "${WORKDIR}"/extra-headers/gnu || die
		touch "${WORKDIR}"/extra-headers/gnu/stubs-32.h || die
		export CPATH="${WORKDIR}"/extra-headers
	fi

	# Don't bother with qemu, only needed for fully virtualised guests
	if ! use qemu; then
		sed -e "/^CONFIG_IOEMU := y$/d" -i config/*.mk || die
		sed -e "s:install-tools\: tools/ioemu-dir:install-tools\: :g" -i Makefile || die
	fi

	mv ../seabios-${SEABIOS_VER} tools/firmware/seabios-dir-remote || die
	pushd tools/firmware/ > /dev/null
	ln -s seabios-dir-remote seabios-dir || die
	popd > /dev/null

	# Reset bash completion dir; Bug 472438
	sed -e "s:^BASH_COMPLETION_DIR ?= \$(CONFIG_DIR)/bash_completion.d:BASH_COMPLETION_DIR ?= $(get_bashcompdir):" \
		-i Config.mk || die
	sed -i -e "/bash-completion/s/xl\.sh/xl/g" tools/libxl/Makefile || die

	# Bug 445986
	sed -e 's:$(MAKE) PYTHON=$(PYTHON) subdirs-$@:LC_ALL=C "$(MAKE)" PYTHON=$(PYTHON) subdirs-$@:' -i tools/firmware/Makefile || die

	# fix QA warning, create /var/run/, /var/lock dynamically
	sed -i -e "/\$(INSTALL_DIR) \$(DESTDIR)\$(XEN_RUN_DIR)/d" \
		tools/libxl/Makefile || die

	sed -i -e "/\/var\/run\//d" \
		tools/xenstore/Makefile \
		tools/pygrub/Makefile || die

	sed -i -e "/\/var\/lock\/subsys/d" \
		tools/Makefile || die

	# xencommons, Bug #492332, sed lighter weight than patching
	sed -e 's:\$QEMU_XEN -xen-domid:test -e "\$QEMU_XEN" \&\& &:' \
		-i tools/hotplug/Linux/init.d/xencommons || die

	epatch_user
}

src_compile() {
	export VARTEXFONTS="${T}/fonts"
	local myopt
	use debug && myopt="${myopt} debug=y"

	use custom-cflags || unset CFLAGS
	if test-flag-CC -fno-strict-overflow; then
		append-flags -fno-strict-overflow
	fi

	unset LDFLAGS
	unset CFLAGS
	emake V=1 CC="$(tc-getCC)" LD="$(tc-getLD)" AR="$(tc-getAR)" RANLIB="$(tc-getRANLIB)" -C tools ${myopt}

	use doc && emake -C docs txt html
	emake -C docs man-pages
}

src_install() {
	# Override auto-detection in the build system, bug #382573
	export INITD_DIR=/tmp/init.d
	export CONFIG_LEAF_DIR=../tmp/default

	# Let the build system compile installed Python modules.
	local PYTHONDONTWRITEBYTECODE
	export PYTHONDONTWRITEBYTECODE

	emake DESTDIR="${ED}" DOCDIR="/usr/share/doc/${PF}" install-tools \
		XEN_PYTHON_NATIVE_INSTALL=y install-tools
	# Fix the remaining Python shebangs.
	python_fix_shebang "${ED}"

	# Remove RedHat-specific stuff
	rm -rf "${D}"tmp || die

	# uncomment lines in xl.conf
	sed -e 's:^#autoballoon=1:autoballoon=1:' \
		-e 's:^#lockfile="/var/lock/xl":lockfile="/var/lock/xl":' \
		-e 's:^#vifscript="vif-bridge":vifscript="vif-bridge":' \
		-i tools/examples/xl.conf  || die

	if use doc; then
		emake DESTDIR="${D}" DOCDIR="/usr/share/doc/${PF}" install-docs

		dohtml -r docs/
		docinto pdf
		dodoc ${DOCS[@]}
		[ -d "${D}"/usr/share/doc/xen ] && mv "${D}"/usr/share/doc/xen/* "${D}"/usr/share/doc/${PF}/html
	fi

	rm -rf "${D}"/usr/share/doc/xen/
	doman docs/man?/*

	newconfd "${FILESDIR}"/xendomains.confd xendomains
	newconfd "${FILESDIR}"/xenstored.confd xenstored
	newconfd "${FILESDIR}"/xenconsoled.confd xenconsoled
	newinitd "${FILESDIR}"/xendomains.initd-r2 xendomains
	newinitd "${FILESDIR}"/xenstored.initd xenstored
	newinitd "${FILESDIR}"/xenconsoled.initd xenconsoled
	newinitd "${FILESDIR}"/xencommons.initd xencommons
	newconfd "${FILESDIR}"/xencommons.confd xencommons

	if use screen; then
		cat "${FILESDIR}"/xendomains-screen.confd >> "${ED}"/etc/conf.d/xendomains || die
		cp "${FILESDIR}"/xen-consoles.logrotate "${ED}"/etc/xen/ || die
		keepdir /var/log/xen-consoles
	fi

	if [[ "${ARCH}" == 'amd64' ]] && use qemu; then
		mkdir -p "${D}"usr/$(get_libdir)/xen/bin || die
		mv "${D}"usr/lib/xen/bin/qemu* "${D}"usr/$(get_libdir)/xen/bin/ || die
	fi

	# For -static-libs wrt Bug 384355
	if ! use static-libs; then
		rm -f "${D}"usr/$(get_libdir)/*.a "${D}"usr/$(get_libdir)/ocaml/*/*.a
	fi

	# xend expects these to exist
	keepdir /var/lib/xenstored /var/xen/dump /var/lib/xen /var/log/xen

	# for xendomains
	keepdir /etc/xen/auto

	# Temp QA workaround
	dodir "$(get_udevdir)"
	mv "${D}"/etc/udev/* "${D}/$(get_udevdir)"
	rm -rf "${D}"/etc/udev

	# Remove files failing QA AFTER emake installs them, avoiding seeking absent files
	find "${D}" \( -name openbios-sparc32 -o -name openbios-sparc64 \
		-o -name openbios-ppc -o -name palcode-clipper \) -delete || die
}

pkg_postinst() {
	elog "Official Xen Guide and the offical wiki page:"
	elog "https://www.gentoo.org/doc/en/xen-gu"${D}"usr/ide.xml"
	elog "http://wiki.xen.org/wiki/Main_Page"
	elog ""
	elog "Recommended to utilise the xencommons script to config sytem at boot."
	elog "Add by use of rc-update on completion of the install"

	# TODO: we need to have the current Python slot here.
	if ! has_version "dev-lang/python[ncurses]"; then
		echo
		ewarn "NB: Your dev-lang/python is built without USE=ncurses."
		ewarn "Please rebuild python with USE=ncurses to make use of xenmon.py."
	fi

	if has_version "sys-apps/iproute2[minimal]"; then
		echo
		ewarn "Your sys-apps/iproute2 is built with USE=minimal. Networking"
		ewarn "will not work until you rebuild iproute2 without USE=minimal."
	fi

	if ! use hvm; then
		echo
		elog "HVM (VT-x and AMD-V) support has been disabled. If you need hvm"
		elog "support enable the hvm use flag."
		elog "An x86 or amd64 system is required to build HVM support."
	fi

	if grep -qsF XENSV= "${ROOT}/etc/conf.d/xend"; then
		echo
		elog "xensv is broken upstream (Gentoo bug #142011)."
		elog "Please remove '${ROOT%/}/etc/conf.d/xend', as it is no longer needed."
	fi
}