dune.eclass: new eclass

New eclass for the Dune build system for OCaml.

https://github.com/ocaml/dune

Based on oasis.eclass and opam.eclass for OCaml.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>
Signed-off-by: Joonas Niilola <juippis@gentoo.org>

1 files changed, 65 insertions, 0 deletions

diff --git a/eclass/dune.eclass b/eclass/dune.eclass
new file mode 100644
index 000000000000..9ab6ec204c21
--- /dev/null
+++ b/eclass/dune.eclass
@@ -0,0 +1,65 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: dune.eclass
+# @MAINTAINER:
+# rkitover@gmail.com
+# @AUTHOR:
+# Rafael Kitover <rkitover@gmail.com>
+# @SUPPORTED_EAPIS: 5 6 7
+# @BLURB: Provides functions for installing dune packages.
+# @DESCRIPTION:
+# Provides dependencies on dune and ocaml and default src_compile, src_test and
+# src_install for dune-based packages.
+
+# @ECLASS-VARIABLE: DUNE_PKG_NAME
+# @DESCRIPTION:
+# Sets the actual dune package name, if different from gentoo package name.
+# Set before inheriting the eclass.
+
+case ${EAPI:-0} in
+	5|6|7) ;;
+	*) die "${ECLASS}: EAPI ${EAPI} not supported" ;;
+esac
+
+EXPORT_FUNCTIONS src_compile src_test src_install
+
+RDEPEND=">=dev-lang/ocaml-4:=[ocamlopt?]"
+DEPEND="${RDEPEND}
+	dev-ml/dune"
+
+dune_src_compile() {
+	dune build @install || die
+}
+
+dune_src_test() {
+	dune runtest || die
+}
+
+# @FUNCTION: dune-install
+# @USAGE: <list of packages>
+# @DESCRIPTION:
+# Installs the dune packages given as arguments. For each "${pkg}" element in
+# that list, "${pkg}.install" must be readable from "${PWD}/_build/default"
+dune-install() {
+	local pkg
+	for pkg ; do
+		dune install \
+			--prefix="${ED%/}/usr" \
+			--libdir="${D%/}$(ocamlc -where)" \
+			"${pkg}" || die
+	done
+}
+
+dune_src_install() {
+	local pkg="${1:-${DUNE_PKG_NAME:-${PN}}}"
+
+	dune-install "${pkg}"
+
+	# Move docs to the appropriate place.
+	if [ -d "${ED%/}/usr/doc/${pkg}" ] ; then
+		mkdir -p "${ED%/}/usr/share/doc/${PF}/" || die
+		mv "${ED%/}/usr/doc/${pkg}/"* "${ED%/}/usr/share/doc/${PF}/" || die
+		rm -rf "${ED%/}/usr/doc" || die
+	fi
+}