# Copyright 1999-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

EAPI="2"

if [[ ${PV} = *9999* ]]; then
	EGIT_REPO_URI="git://git.kernel.org/pub/scm/virt/kvm/qemu-kvm.git"
	GIT_ECLASS="git"
fi

inherit eutils flag-o-matic ${GIT_ECLASS} linux-info toolchain-funcs

if [[ ${PV} = *9999* ]]; then
	SRC_URI=""
	KEYWORDS=""
else
	SRC_URI="mirror://sourceforge/kvm/${PN}/${P}.tar.gz"
	KEYWORDS="~amd64 ~ppc ~ppc64 ~x86"
fi

DESCRIPTION="QEMU + Kernel-based Virtual Machine userland tools"
HOMEPAGE="http://www.linux-kvm.org"

LICENSE="GPL-2"
SLOT="0"
# xen is disabled until the deps are fixed
IUSE="+aio alsa bluetooth brltty curl esd fdt hardened jpeg ncurses \
png pulseaudio qemu-ifup sasl sdl ssl static vde"

COMMON_TARGETS="i386 x86_64 arm cris m68k microblaze mips mipsel ppc ppc64 sh4 sh4eb sparc sparc64"
IUSE_SOFTMMU_TARGETS="${COMMON_TARGETS} mips64 mips64el ppcemb"
IUSE_USER_TARGETS="${COMMON_TARGETS} alpha armeb ppc64abi32 sparc32plus"

for target in ${IUSE_SOFTMMU_TARGETS}; do
	IUSE="${IUSE} +qemu_softmmu_targets_${target}"
done

for target in ${IUSE_USER_TARGETS}; do
	IUSE="${IUSE} +qemu_user_targets_${target}"
done

RESTRICT="test"

RDEPEND="
	!app-emulation/kqemu
	!app-emulation/qemu
	!app-emulation/qemu-softmmu
	!app-emulation/qemu-user
	!app-emulation/qemu-kvm-spice
	sys-apps/pciutils
	>=sys-apps/util-linux-2.16.0
	sys-libs/zlib
	aio? ( dev-libs/libaio )
	alsa? ( >=media-libs/alsa-lib-1.0.13 )
	bluetooth? ( net-wireless/bluez )
	brltty? ( app-accessibility/brltty )
	curl? ( net-misc/curl )
	esd? ( media-sound/esound )
	fdt? ( >=sys-apps/dtc-1.2.0 )
	jpeg? ( virtual/jpeg )
	ncurses? ( sys-libs/ncurses )
	png? ( media-libs/libpng )
	pulseaudio? ( media-sound/pulseaudio )
	qemu-ifup? ( sys-apps/iproute2 net-misc/bridge-utils )
	sasl? ( dev-libs/cyrus-sasl )
	sdl? ( >=media-libs/libsdl-1.2.11[X] )
	ssl? ( net-libs/gnutls )
	vde? ( net-misc/vde )
	amd64? ( >=app-emulation/spice-0.6.0 )
	amd64? ( >=app-emulation/spice-protocol-0.6.0 )
"

DEPEND="${RDEPEND}
	app-text/texi2html
	>=sys-kernel/linux-headers-2.6.29
	ssl? ( dev-util/pkgconfig )
"

kvm_kern_warn() {
	eerror "Please enable KVM support in your kernel, found at:"
	eerror
	eerror "  Virtualization"
	eerror "    Kernel-based Virtual Machine (KVM) support"
	eerror
}

pkg_setup() {
	use qemu_softmmu_targets_x86_64 || ewarn "You disabled default target QEMU_SOFTMMU_TARGETS=x86_64"

	if kernel_is lt 2 6 25; then
		eerror "This version of KVM requres a host kernel of 2.6.25 or higher."
		eerror "Either upgrade your kernel"
	else
		if ! linux_config_exists; then
			eerror "Unable to check your kernel for KVM support"
			kvm_kern_warn
		elif ! linux_chkconfig_present KVM; then
			kvm_kern_warn
		fi
	fi

	enewgroup kvm
}

src_prepare() {
	# prevent docs to get automatically installed
	sed -i '/$(DESTDIR)$(docdir)/d' Makefile || die
	# Alter target makefiles to accept CFLAGS set via flag-o
	sed -i 's/^\(C\|OP_C\|HELPER_C\)FLAGS=/\1FLAGS+=/' \
		Makefile Makefile.target || die
	# append CFLAGS while linking
	sed -i 's/$(LDFLAGS)/$(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS)/' rules.mak || die

	# remove part to make udev happy
	sed -e 's~NAME="%k", ~~' -i kvm/scripts/65-kvm.rules || die

	# ${PN}-guest-hang-on-usb-add.patch was sent by Timothy Jones
	# to the qemu-devel ml - bug 337988
	epatch "${FILESDIR}/qemu-0.11.0-mips64-user-fix.patch" \
		"${FILESDIR}/${PN}-0.12.3-include-madvise-defines.patch"
#		"${FILESDIR}/${PN}-guest-hang-on-usb-add.patch"

	epatch "${FILESDIR}/${PN}-0.13.0-redhat-patches.patch"
}

src_configure() {
	local conf_opts audio_opts user_targets

	for target in ${IUSE_SOFTMMU_TARGETS} ; do
		use "qemu_softmmu_targets_${target}" && \
		softmmu_targets="${softmmu_targets} ${target}-softmmu"
	done

	for target in ${IUSE_USER_TARGETS} ; do
		use "qemu_user_targets_${target}" && \
		user_targets="${user_targets} ${target}-linux-user"
	done

	if [ -z "${softmmu_targets}" ]; then
		conf_opts="${conf_opts} --disable-system"
	else
		einfo "Building the following softmmu targets: ${softmmu_targets}"
	fi

	if [ ! -z "${user_targets}" ]; then
		einfo "Building the following user targets: ${user_targets}"
		conf_opts="${conf_opts} --enable-linux-user"
	else
		conf_opts="${conf_opts} --disable-linux-user"
	fi

	# Fix QA issues. QEMU needs executable heaps and we need to mark it as such
	conf_opts="${conf_opts} --extra-ldflags=-Wl,-z,execheap"

	# Add support for static builds
	use static && conf_opts="${conf_opts} --static"

	# Fix the $(prefix)/etc issue
	conf_opts="${conf_opts} --sysconfdir=/etc"

	#config options
	conf_opts="${conf_opts} $(use_enable aio linux-aio)"
	conf_opts="${conf_opts} $(use_enable bluetooth bluez)"
	conf_opts="${conf_opts} $(use_enable brltty brlapi)"
	conf_opts="${conf_opts} $(use_enable curl)"
	conf_opts="${conf_opts} $(use_enable fdt)"
	conf_opts="${conf_opts} $(use_enable hardened user-pie)"
	conf_opts="${conf_opts} $(use_enable jpeg vnc-jpeg)"
	conf_opts="${conf_opts} $(use_enable ncurses curses)"
	conf_opts="${conf_opts} $(use_enable png vnc-png)"
	conf_opts="${conf_opts} $(use_enable sasl vnc-sasl)"
	conf_opts="${conf_opts} $(use_enable sdl)"
	conf_opts="${conf_opts} $(use_enable ssl vnc-tls)"
	conf_opts="${conf_opts} $(use_enable vde)"
#	conf_opts="${conf_opts} $(use_enable xen)"
	conf_opts="${conf_opts} --disable-xen"
	conf_opts="${conf_opts} --disable-darwin-user --disable-bsd-user"

	# enable spice on amd64
	use amd64 && conf_opts="${conf_opts} --enable-spice"

	# audio options
	audio_opts="oss"
	use alsa && audio_opts="alsa ${audio_opts}"
	use esd && audio_opts="esd ${audio_opts}"
	use pulseaudio && audio_opts="pa ${audio_opts}"
	use sdl && audio_opts="sdl ${audio_opts}"
	./configure --prefix=/usr \
		--disable-strip \
		--disable-werror \
		--enable-kvm \
		--enable-nptl \
		--enable-uuid \
		${conf_opts} \
		--audio-drv-list="${audio_opts}" \
		--target-list="${softmmu_targets} ${user_targets}" \
		--cc="$(tc-getCC)" \
		--host-cc="$(tc-getBUILD_CC)" \
		|| die "configure failed"

		# this is for qemu upstream's threaded support which is
		# in development and broken
		# the kvm project has its own support for threaded IO
		# which is always on and works
		# --enable-io-thread \
}

src_compile() {
	# Restricting parallel build until we get a patch to fix this
	emake -j1 || die
}

src_install() {
	emake DESTDIR="${D}" install || die "make install failed"

	if [ ! -z "${softmmu_targets}" ]; then
		insinto /etc/udev/rules.d/
		doins kvm/scripts/65-kvm.rules || die

		if use qemu-ifup; then
			insinto /etc/qemu/
			insopts -m0755
			doins kvm/scripts/qemu-ifup || die
		fi

		if use qemu_softmmu_targets_x86_64 ; then
			dobin "${FILESDIR}"/qemu-kvm
			dosym /usr/bin/qemu-kvm /usr/bin/kvm
		else
			elog "You disabled QEMU_SOFTMMU_TARGETS=x86_64, this disables install"
			elog "of /usr/bin/qemu-kvm and /usr/bin/kvm"
		fi
	fi

	dodoc Changelog MAINTAINERS TODO pci-ids.txt || die
	newdoc pc-bios/README README.pc-bios || die
	dohtml qemu-doc.html qemu-tech.html || die
}

pkg_postinst() {

	if [ ! -z "${softmmu_targets}" ]; then
		elog "If you don't have kvm compiled into the kernel, make sure you have"
		elog "the kernel module loaded before running kvm. The easiest way to"
		elog "ensure that the kernel module is loaded is to load it on boot."
		elog "For AMD CPUs the module is called 'kvm-amd'"
		elog "For Intel CPUs the module is called 'kvm-intel'"
		elog "Please review /etc/conf.d/modules for how to load these"
		elog
		elog "Make sure your user is in the 'kvm' group"
		elog "Just run 'gpasswd -a <USER> kvm', then have <USER> re-login."
		elog
		elog "You will need the Universal TUN/TAP driver compiled into your"
		elog "kernel or loaded as a module to use the virtual network device"
		elog "if using -net tap.  You will also need support for 802.1d"
		elog "Ethernet Bridging and a configured bridge if using the provided"
		elog "kvm-ifup script from /etc/kvm."
		elog
		elog "The gnutls use flag was renamed to ssl, so adjust your use flags."
	fi
}