# Copyright 1999-2008 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header:  $

inherit eutils versionator multilib toolchain-funcs

MY_PN="OpenFOAM"
MY_PV=$(get_version_component_range 1-2)
MY_P="${MY_PN}-${MY_PV}"

DESCRIPTION="Open Field Operation and Manipulation - CFD Simulation Toolbox"
HOMEPAGE="http://www.opencfd.co.uk/openfoam/"
SRC_URI="mirror://sourceforge/foam/${MY_P}.General.gtgz"

LICENSE="GPL-2"
SLOT="1.5"
KEYWORDS="~amd64 ~x86"
IUSE="examples doc"

DEPEND="!sci-libs/openfoam-bin
	!sci-libs/openfoam-kernel
	!sci-libs/openfoam-meta
	!sci-libs/openfoam-solvers
	!sci-libs/openfoam-utilities
	!sci-libs/openfoam-wmake
	sci-libs/parmetis
	sci-libs/parmgridgen
	virtual/mpi"

S=${WORKDIR}/${MY_P}

pkg_setup() {
	if ! version_is_at_least 4.1 $(gcc-version) ; then
		die "${PN} requires >=sys-devel/gcc-4.1 to compile."
	fi

	elog
	elog "In order to use ${MY_PN} you should add the following line to ~/.bashrc :"
	elog "source /usr/$(get_libdir)/${MY_PN}/${MY_P}/etc/bashrc"
	ewarn
	ewarn "FoamX is deprecated since ${MY_PN}-1.5! "
	ewarn
}

src_unpack() {
	ln -s "${DISTDIR}"/${MY_P}.General.gtgz ${MY_P}.General.tgz
	unpack ./${MY_P}.General.tgz

	cd "${S}"
	epatch "${FILESDIR}"/${MY_P}-compile.patch

	# there is no obvious way to clean the tree after build
	# save src to install it later
	cp -a src src.orig || die "failed to create src backup"

	# fix hardwired paths in other places
	find ${S}/wmake/rules -name X -exec \
		sed -i "s|-L/usr/X11R6/lib|`pkg-config --libs-only-L x11`|g" \{\} \; \
		|| die "failed to fix hardwired X libs"
	find ${S}/wmake/rules -name X -exec \
		sed -i "s|-I/usr/X11R6/include|`pkg-config --cflags-only-I x11`|g" \{\} \; \
		|| die "failed to fix hardwired X includes"
}

src_compile() {
	if has_version sys-cluster/lam-mpi ; then
		export WM_MPLIB=LAM
	elif has_version sys-cluster/mpich2 ; then
		export WM_MPLIB=MPICH
	elif has_version sys-cluster/openmpi ; then
		export WM_MPLIB=OPENMPI
	else
		die "You need one of the following mpi implementations: openmpi, lam-mpi or mpich2"
	fi

	sed -i -e "s|WM_MPLIB:=OPENMPI|WM_MPLIB:=${WM_MPLIB}|" etc/bashrc \
		|| die "failed to fix MPI_LIB in etc/bashrc"
	sed -i -e "s|setenv WM_MPLIB OPENMPI|setenv WM_MPLIB ${WM_MPLIB}|" etc/cshrc \
		|| die "failed to fix MPI_LIB in etc/cshrc"

	export FOAM_INST_DIR=${WORKDIR}
	# next command is quite dangerous, since it does not rewrite
	# environment variables if they already set, this can lead to
	# really unpredictable results. solution would be to unset all
	# FOAM_* and WM_* variables
	source etc/bashrc

	find wmake -name dirToString | xargs rm -rf
	find wmake -name wmkdep | xargs rm -rf

	./Allwmake || die "could not build"
}

src_test() {
	cd bin
	./foamInstallationTest
}

src_install() {
	insinto /usr/$(get_libdir)/${MY_PN}/${MY_P}
	doins -r etc

	insopts -m0755
	doins -r bin

	insinto /usr/$(get_libdir)/${MY_PN}/${MY_P}/applications/bin
	doins -r applications/bin/*

	insinto /usr/$(get_libdir)/${MY_PN}/${MY_P}/lib
	doins -r lib/*

	insinto /usr/$(get_libdir)/${MY_PN}/${MY_P}/wmake
	doins -r wmake/*

	insopts -m0644
	insinto /usr/share/doc/${P}
	doins doc/Guides-a4/*.pdf
	dodoc COPYING  README  README.html  ReleaseNotes-1.5  ReleaseNotes-1.5.html

	if use doc ; then
		doins -r doc/Doxygen
		dosym /usr/share/doc/${P} /usr/$(get_libdir)/${MY_PN}/${MY_P}/doc
	fi

	if use examples ;then
		insinto /usr/share/${P}
		# tutorials
		rm -rf tutorials/rhoPorousSimpleFoam/angledDuctExplicit/{0,constant}
		cp -a tutorials/rhoPorousSimpleFoam/angledDuctImplicit/{0,constant} \
			tutorials/rhoPorousSimpleFoam/angledDuctExplicit
		doins -r tutorials
		dosym /usr/share/${P}/tutorials /usr/$(get_libdir)/${MY_PN}/${MY_P}/tutorials
		# and sources
		rm -rf src && mv src.orig src  || die "failed to restore src backup"
		doins -r src
		dosym /usr/share/${P}/src /usr/$(get_libdir)/${MY_PN}/${MY_P}/src
	fi
}