1 files changed, 88 insertions, 0 deletions
diff --git a/games-simulation/EmptyEpsilon/EmptyEpsilon-2022.03.16.ebuild b/games-simulation/EmptyEpsilon/EmptyEpsilon-2022.03.16.ebuild
new file mode 100644
index 000000000000..9842d07150b2
--- /dev/null
+++ b/games-simulation/EmptyEpsilon/EmptyEpsilon-2022.03.16.ebuild
@@ -0,0 +1,88 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake toolchain-funcs
+
+# basics_universal version
+MY_BU_VER="1_15_update2"
+# meshoptimizer version
+MY_MO_VER="0.16"
+
+DESCRIPTION="A spaceship bridge simulator game"
+HOMEPAGE="https://daid.github.io/EmptyEpsilon/"
+# This bundles SeriousProton as the build system does not support using
+# a separate SeriousProton instance (and currently EmptyEpsilon seems to
+# be the only consumer).
+SRC_URI="
+	https://github.com/daid/EmptyEpsilon/archive/EE-${PV}.tar.gz -> EmptyEpsilon-${PV}.tar.gz
+	https://github.com/daid/SeriousProton/archive/EE-${PV}.tar.gz -> SeriousProton-${PV}.tar.gz
+	https://github.com/BinomialLLC/basis_universal/archive/refs/tags/v${MY_BU_VER}.tar.gz -> basis_universal_${MY_BU_VER}.tar.gz
+	https://github.com/zeux/meshoptimizer/archive/refs/tags/v${MY_MO_VER}.tar.gz -> meshoptimizer-${MY_MO_VER}.tar.gz
+"
+
+# EmptyEpsilon is mostly licensed under GPL, however the art ressources
+# use Creative Commons and the bundled SeriousProton is MIT-licensed.
+LICENSE="Apache-2.0 GPL-2 CC-BY-SA-3.0 MIT"
+SLOT="0"
+KEYWORDS="~amd64"
+
+RDEPEND="
+	dev-cpp/nlohmann_json
+	media-libs/freetype
+	media-libs/libsdl2
+	>=media-libs/glm-0.9.9.8
+"
+DEPEND="${RDEPEND}"
+
+S="${WORKDIR}/EmptyEpsilon-EE-${PV}"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-cmake-meshoptimizer.patch"
+)
+
+pkg_pretend() {
+	[[ ${MERGE_TYPE} == "binary" ]] && return
+
+	if tc-is-gcc; then
+		if [[ $(gcc-major-version) -lt 11 ]]; then
+			# ld: /usr/lib64/libsfml-audio.so: undefined reference to `std::__throw_bad_array_new_length()@GLIBCXX_3.a4.29'
+			eerror "${PN} requires GCC >= 11. Run gcc-config to switch your default compiler."
+			die "Need at least GCC >= 11"
+		fi
+	fi
+}
+
+src_prepare() {
+	cmake_src_prepare
+
+	local -A externals=()
+	externals["${BUILD_DIR}/SeriousProton/externals/basis"]="${WORKDIR}/basis_universal-${MY_BU_VER}"
+	externals["${BUILD_DIR}/externals/meshoptimizer"]="${WORKDIR}/meshoptimizer-${MY_MO_VER}"
+	local link
+	for link in "${!externals[@]}"; do
+		local external_dir=$(dirname "${link}")
+		if [[ ! -d "${external_dir}" ]]; then
+			mkdir -p "${external_dir}" || die
+		fi
+		local target="${externals[${link}]}"
+		ln -rs "${target}" "${link}" || die
+	done
+
+	eapply --directory="${WORKDIR}/SeriousProton-EE-${PV}" \
+		   "${FILESDIR}/SeriousProton-cmake.patch"
+}
+
+src_configure() {
+	local version=( $(ver_rs 1- ' ') )
+	local mycmakeargs=(
+		-DSERIOUS_PROTON_DIR="${WORKDIR}/SeriousProton-EE-${PV}/"
+		-DCPACK_PACKAGE_VERSION="${PV}"
+		-DCPACK_PACKAGE_VERSION_MAJOR="${version[0]}"
+		-DCPACK_PACKAGE_VERSION_MINOR="${version[1]}"
+		-DCPACK_PACKAGE_VERSION_PATCH="${version[2]}"
+	)
+
+	cmake_src_configure
+}