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# Copyright 1999-2017 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: opam.eclass
# @MAINTAINER:
# Gentoo ML Project <ml@gentoo.org>
# @AUTHOR:
# Alexis Ballier <aballier@gentoo.org>
# @BLURB: Provides functions for installing opam packages.
# @DESCRIPTION:
# Provides dependencies on opam and ocaml, opam-install and a default
# src_install for opam-based packages.

case ${EAPI:-0} in
    0|1|2|3|4) die "You need at least EAPI-5 to use opam.eclass";;
    *) ;;
esac

RDEPEND=">=dev-lang/ocaml-4:="
DEPEND="${RDEPEND}
	dev-ml/opam"

# @FUNCTION: opam-install
# @USAGE: <list of packages>
# @DESCRIPTION:
# Installs the opam packages given as arguments. For each "${pkg}" element in
# that list, "${pkg}.install" must be readable from current working directory.
opam-install() {
	local pkg
	for pkg ; do
		opam-installer -i \
			--prefix="${ED}usr" \
			--libdir="${D}$(ocamlc -where)" \
			--docdir="${ED}usr/share/doc/${PF}" \
			--mandir="${ED}usr/share/man" \
			"${pkg}.install" || die
	done
}

opam_src_install() {
	local pkg="${1:-${PN}}"
	opam-install "${pkg}"
	# Handle opam putting doc in a subdir
	if [ -d "${ED}usr/share/doc/${PF}/${pkg}" ] ; then
		mv "${ED}usr/share/doc/${PF}/${pkg}/"* "${ED}usr/share/doc/${PF}/" || die
		rmdir "${ED}usr/share/doc/${PF}/${pkg}" || die
	fi
}

EXPORT_FUNCTIONS src_install