# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

inherit R-packages eapi8-dosym

MY_PV="$(ver_cut 2-4 ${PV})"
DESCRIPTION='Header-Only C++ Mathematical Optimization library for armadillo'
#SRC_URI="mirror://cran/src/contrib/RcppEnsmallen/RcppEnsmallen_${PV}.tar.gz"
KEYWORDS="~amd64"
LICENSE='GPL-2+'

DEPEND="
	>=dev-lang/R-3.3.0
	dev-R/Rcpp
	=sci-libs/ensmallen-${MY_PV}*
"
RDEPEND="${DEPEND}
	>=dev-R/RcppArmadillo-0.8.400.0.0
"

src_prepare() {
	default

	# remove bundled
	rm -r inst/include/ensmallen_bits || die
	rm inst/include/ensmallen.hpp || die

	# link to sci-libs/ensmallen
	ln -s "${ESYSROOT}"/usr/include/ensmallen_bits inst/include/ensmallen_bits || die
	ln -s "${ESYSROOT}"/usr/include/ensmallen.hpp inst/include/ensmallen.hpp || die
}

src_install() {
	R-packages_src_install

	R_includedir="/usr/$(get_libdir)/R/site-library/${PN}/include"
	dosym8 -r /usr/include/ensmallen.hpp "${R_includedir}/ensmallen.hpp"

	dodir /usr/include/ensmallen_bits
	for file in "${ED}/${R_includedir}"/ensmallen_bits/*; do
		filename=$(basename "${file}")
		dosym8 -r /usr/include/ensmallen_bits/${file} "${R_includedir}/ensmallen_bits/${file}"
	done
}