dev-cpp/gulrak-filesystem: New package needed by x11-misc/barrier

Signed-off-by: James Le Cuirot <chewi@gentoo.org>

dev-cpp/gulrak-filesystem/Manifest

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+DIST gulrak-filesystem-1.5.10.tar.gz 176873 BLAKE2B 0c9ccfd918ede195c65a25a361c9d3a7acca99d2e5e917911a5dcd7e74c989c291f37e962943771860ea8b14f26d066863faea4dd17cb25d44aa9061913d5e5c SHA512 470dd9e1c4358f9d8d9f531d8c3c6716cdd156c815315748436a1dc3caf095d320e58eae2274df8c15e293cc96170752fb00aed8ad2210d417b174c13297fbac

dev-cpp/gulrak-filesystem/gulrak-filesystem-1.5.10.ebuild

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+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake
+
+DESCRIPTION="Header-only single-file std::filesystem compatible helper library"
+HOMEPAGE="https://github.com/gulrak/filesystem"
+SRC_URI="https://github.com/gulrak/filesystem/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="examples test"
+RESTRICT="!test? ( test )"
+
+S="${WORKDIR}/${P#*-}"
+
+src_configure() {
+	local mycmakeargs=(
+		-DGHC_FILESYSTEM_BUILD_EXAMPLES=OFF
+		-DGHC_FILESYSTEM_BUILD_TESTING=$(usex test)
+		-DGHC_FILESYSTEM_WITH_INSTALL=ON
+	)
+
+	cmake_src_configure
+}
+
+src_install() {
+	cmake_src_install
+
+	docinto examples
+	use examples && dodoc examples/*.cpp
+}

dev-cpp/gulrak-filesystem/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>chewi@gentoo.org</email>
+		<name>James Le Cuirot</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">gulrak/filesystem</remote-id>
+	</upstream>
+</pkgmetadata>