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# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

FORTRAN_NEEDED=fortran

PYTHON_COMPAT=( python3_{7..9} )

inherit cmake fortran-2 python-single-r1

DESCRIPTION="A library to store and exchange meshed data or computation results"
HOMEPAGE="https://www.salome-platform.org/user-section/about/med"
SRC_URI="https://files.salome-platform.org/Salome/other/${P}.tar.gz"
LICENSE="LGPL-3"

SLOT="0"
KEYWORDS="~amd64 ~x86"
IUSE="doc fortran mpi python test"
REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
RESTRICT="!test? ( test ) python? ( test )"

RDEPEND="
	!sci-libs/libmed
	dev-lang/tk:0=
	>=sci-libs/hdf5-1.10.2:=[fortran?,mpi?]
	mpi? ( virtual/mpi[fortran?] )
	python? ( ${PYTHON_DEPS} )
"
DEPEND="${RDEPEND}"
BDEPEND="python? ( >=dev-lang/swig-3.0.8 )"

PATCHES=(
	"${FILESDIR}/${P}-0001-Gentoo-specific-Adjust-install-path-for-build-dir.patch"
	"${FILESDIR}/${P}-0002-Re-add-option-for-building-Fortran-library.patch"
)

DOCS=( AUTHORS ChangeLog NEWS README README.CMAKE TODO )

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

src_prepare() {
	if use python; then
		# fixes for correct libdir name
		local pysite=$(python_get_sitedir)
		pysite="${pysite##/usr/}"
		sed \
			-e 's@SET(_install_dir lib/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages/med)@SET(_install_dir '${pysite}'/med)@' \
			-i ./python/CMakeLists.txt || die "sed on ./python/CMakeLists.txt failed"
	fi
	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 ${cm} failed"
	done
	sed -e 's/med-fichier/med/' -i CMakeLists.txt || die "fix paths failed"
	sed -e 's|doc/med-${MED_STR_VERSION}|doc/med-${MED_STR_VERSION}/html|' \
		-i CMakeLists.txt || die "fix doc path failed"

	cmake_src_prepare
}

src_configure() {
	local mycmakeargs=(
		# 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
		-DMEDFILE_BUILD_FORTRAN=$(usex fortran)
		-DMEDFILE_BUILD_PYTHON=$(usex python)
		-DMEDFILE_BUILD_SHARED_LIBS=ON
		-DMEDFILE_BUILD_STATIC_LIBS=OFF
		-DMEDFILE_BUILD_TESTS=$(usex test)
		-DMEDFILE_INSTALL_DOC=$(usex doc)
		-DMEDFILE_USE_MPI=$(usex mpi)
		-DMEDFILE_USE_UNICODE=ON
	)
	cmake_src_configure
}

src_install() {
	cmake_src_install

	# we don't need old 2.3.6 include files
	rm -r "${ED}"/usr/include/2.3.6 || die "failed to delete obsolete include dir"

	# 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
	if use test; then
		rm -r "${ED}"/usr/bin/testc || die "failed to delete C test executables"
		if use fortran; then
			rm -r "${ED}"/usr/bin/testf || die "failed to delete fortran test executables"
		fi
		if use python; then
			rm -r "${ED}"/usr/bin/testpy || die "failed to delete python test executables"
		fi
	fi
}

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