# Copyright 1999-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

inherit cmake toolchain-funcs

Sparse_PV="7.6.0"
Sparse_P="SuiteSparse-${Sparse_PV}"
DESCRIPTION="Sparse Cholesky factorization and update/downdate library"
HOMEPAGE="https://people.engr.tamu.edu/davis/suitesparse.html"
SRC_URI="https://github.com/DrTimothyAldenDavis/SuiteSparse/archive/refs/tags/v${Sparse_PV}.tar.gz -> ${Sparse_P}.gh.tar.gz"

LICENSE="LGPL-2.1+ modify? ( GPL-2+ ) matrixops? ( GPL-2+ )"
SLOT="0/5"
KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux"
IUSE="+cholesky cuda doc openmp +matrixops +modify +partition +supernodal test"
RESTRICT="!test? ( test )"

DEPEND=">=sci-libs/suitesparseconfig-${Sparse_PV}
	>=sci-libs/amd-3.3.1
	>=sci-libs/colamd-3.3.2
	supernodal? ( virtual/lapack )
	partition? (
		>=sci-libs/camd-3.3.1
		>=sci-libs/ccolamd-3.3.2
	)
	cuda? (
		dev-util/nvidia-cuda-toolkit
		x11-drivers/nvidia-drivers
	)"
RDEPEND="${DEPEND}"
BDEPEND="doc? ( virtual/latex-base )"

REQUIRED_USE="supernodal? ( cholesky )
	modify? ( cholesky )
	test? ( cholesky matrixops supernodal )"

S="${WORKDIR}/${Sparse_P}/${PN^^}"

pkg_pretend() {
	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
}

pkg_setup() {
[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
}

src_configure() {
	# Note that "N" prefixed options are negative options
	# so, they need to be turned OFF if you want that option.
	# Fortran is turned off as it is only used to compile (untested) demo programs.
	# Define SUITESPARSE_INCLUDEDIR_POSTFIX to "" otherwise it take
	# the value suitesparse, and the include directory would be set to
	# /usr/include/suitesparse
	# This need to be set in all suitesparse ebuilds.
	local mycmakeargs=(
		-DNSTATIC=ON
		-DCHOLMOD_USE_CUDA=$(usex cuda)
		-DCHOLMOD_USE_OPENMP=$(usex openmp)
		-DSUITESPARSE_HAS_FORTRAN=OFF
		-DCHOLMOD_CHOLESKY=$(usex cholesky)
		-DCHOLMOD_MATRIXOPS=$(usex matrixops)
		-DCHOLMOD_MODIFY=$(usex modify)
		-DCHOLMOD_PARTITION=$(usex partition)
		-DCHOLMOD_SUPERNODAL=$(usex supernodal)
		-DSUITESPARSE_DEMOS=$(usex test)
		-DSUITESPARSE_INCLUDEDIR_POSTFIX=""
	)
	cmake_src_configure
}

src_test() {
	# Because we are not using cmake_src_test,
	# we have to manually go to BUILD_DIR
	cd "${BUILD_DIR}" || die
	# Run demo files
	local type="di dl si sl"
	local prog="demo simple"
	local matrix_file="bcsstk01.tri lp_afiro.tri can___24.mtx c.tri"
	for i in ${type}; do
		for k in ${prog}; do
			for j in ${matrix_file}; do
				./cholmod_${i}_${k}   < "${S}/Demo/Matrix/${j}" \
					|| die "failed testing cholmod_${i}_${k} with ${j}"
			done
		done
	done
}

src_install() {
	if use doc; then
		pushd "${S}/Doc" || die
		emake clean
		rm -rf *.pdf || die
		emake
		popd || die
		DOCS="${S}/Doc/*.pdf"
	fi
	cmake_src_install
}