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

EAPI=5

inherit eutils multilib

DESCRIPTION="Utility to switch between OpenGL implementations"
HOMEPAGE="https://wiki.gentoo.org/wiki/No_homepage"

# Source:
# http://www.opengl.org/registry/api/glext.h
# http://www.opengl.org/registry/api/glxext.h
GLEXT="85"
GLXEXT="34"

MIRROR="https://dev.gentoo.org/~mattst88/distfiles"
SRC_URI="https://dev.gentoo.org/~mgorny/dist/opengl.eselect-${PV}.xz"
#	${MIRROR}/${P}.tar.xz"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="*"
IUSE=""

DEPEND="app-arch/xz-utils"
RDEPEND=">=app-admin/eselect-1.2.4"

S=${WORKDIR}

pkg_preinst() {
	# we may be moving the config file, so get it early
	OLD_IMPL=$(eselect opengl show)
}

pkg_postinst() {
	local shopt_save=$(shopt -p nullglob)
	shopt -s nullglob
	local opengl_dirs=( "${EROOT}"/usr/lib*/opengl )
	${shopt_save}
	if [[ -n ${opengl_dirs[@]} ]]; then
		# delete broken symlinks
		find "${opengl_dirs[@]}" -xtype l -delete
		# delete empty leftover directories (they confuse eselect)
		find "${opengl_dirs[@]}" -depth -type d -empty -exec rmdir -v {} +
	fi

	if [[ -n "${OLD_IMPL}" && "${OLD_IMPL}" != '(none)' ]] ; then
		eselect opengl set "${OLD_IMPL}"
	fi
	if [[ -f ${EROOT}/etc/env.d/03opengl ]]; then
		# remove the old file, moved now
		rm -vf "${EROOT}"/etc/env.d/03opengl
	fi
}

src_prepare() {
	# don't die on Darwin users
	if [[ ${CHOST} == *-darwin* ]] ; then
		sed -i -e 's/libGL\.so/libGL.dylib/' opengl.eselect-${PV} || die
	fi
}

src_install() {
	insinto "/usr/share/eselect/modules"
	newins opengl.eselect-${PV} opengl.eselect
#	doman opengl.eselect.5
}