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# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

# EAPI=7 uses ninja generator by default but it's incompatible with USE=fortran
# https://github.com/Kitware/ninja/tree/features-for-fortran#readme
CMAKE_MAKEFILE_GENERATOR=emake

FORTRAN_NEEDED=fortran
# NOTE:The build for multiple python versions should be possible but complecated for the build system
PYTHON_COMPAT=( python2_7 python3_{3,4,5,6} )

inherit cmake-utils fortran-2 python-single-r1

MY_P="med-${PV}"

DESCRIPTION="A library to store and exchange meshed data or computation results"
HOMEPAGE="https://www.salome-platform.org/"
SRC_URI="http://files.salome-platform.org/Salome/other/${MY_P}.tar.gz"

LICENSE="GPL-3 LGPL-3"
SLOT="0"
KEYWORDS="~amd64 ~x86"
IUSE="doc fortran mpi python static-libs test"

REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
RDEPEND="
	sci-libs/hdf5[fortran=,mpi=]
	mpi? ( virtual/mpi[fortran=] )
	python? ( ${PYTHON_DEPS} )
"
DEPEND="${RDEPEND}
	python? ( >=dev-lang/swig-2.0.9:0 )
"

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

PATCHES=(
	"${FILESDIR}/${PN}-3.3.1-cmake-fortran.patch"
	"${FILESDIR}/${PN}-3.3.1-disable-python-compile.patch"  # managed by function of python eclass
	"${FILESDIR}/${PN}-3.3.1-mpi.patch"
	"${FILESDIR}/${P}-hdf5-1.8-support.patch"
	"${FILESDIR}/${P}-cmakelist.patch"
	"${FILESDIR}/${P}-tests.patch"  # disable a few tests not running
	"${FILESDIR}/${P}-installdoc.patch"
)

DOCS=( AUTHORS COPYING COPYING.LESSER ChangeLog NEWS README TODO )

pkg_setup() {
	use python && python-single-r1_pkg_setup
	use fortran && fortran-2_pkg_setup
}

src_prepare() {
	# fixes for correct libdir name
	sed -i -e "s@SET(_install_dir lib/python@SET(_install_dir $(get_libdir)/python@" \
		./python/CMakeLists.txt || die "sed failed"
	for cm in ./src/CMakeLists.txt ./tools/medimport/CMakeLists.txt
	do
		sed -i -e "s@INSTALL(TARGETS \(.*\) DESTINATION lib)@INSTALL(TARGETS \1 DESTINATION $(get_libdir))@" \
			"${cm}" || die "sed on ${cm} failed"
	done

	cmake-utils_src_prepare
}

src_configure() {
	local mycmakeargs=(
		-DMEDFILE_BUILD_FORTRAN=$(usex fortran)
		-DMEDFILE_BUILD_STATIC_LIBS=$(usex static-libs)
		-DMEDFILE_BUILD_PYTHON=$(usex python)
		-DMEDFILE_BUILD_TESTS=$(usex test)
		-DMEDFILE_INSTALL_DOC=$(usex doc)
		-DMEDFILE_USE_MPI=$(usex mpi)
		-DMEDFILE_DOC_DIRECTORY="${EPREFIX}"/usr/share/doc/${PF}/html   # custom var created by patches
		# as indicated in the CMakeLists.txt, the shipped documentation is generated by a custom doxygen, 
		# so let's avoid rebuilding it because it will be different
		-DMEDFILE_BUILD_DOC=OFF
	)
	cmake-utils_src_configure
}

src_install() {
	cmake-utils_src_install

	# the optimization done in CMakeLists.txt has been disabled so
	# we need to do it manually
	use python && python_optimize

	# Prevent test executables being installed
	use test && rm -rf "${D}"/usr/bin/{testc,testf,testpy}
}

src_test() {
	# override parallel mode only for tests
	local myctestargs=( "-j 1" )
	cmake-utils_src_test
}