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diff --git a/dev-cpp/nlohmann_json/nlohmann_json-3.11.2.ebuild b/dev-cpp/nlohmann_json/nlohmann_json-3.11.2.ebuild
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index 000000000000..86bb5e2e2106
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+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+#DOCS_BUILDER="mkdocs"
+# Needs unpackaged plantuml-markdown too
+# ... but plantuml (Python bindings anyway) need network access to generate bits at runtime.
+#DOCS_DEPEND="dev-python/mkdocs-material-extensions dev-python/mkdocs-minify-plugin"
+#DOCS_DIR="doc/mkdocs"
+inherit cmake
+
+# Check https://github.com/nlohmann/json/blob/develop/cmake/download_test_data.cmake to find test archive version
+TEST_VERSION="3.1.0"
+DESCRIPTION="JSON for Modern C++"
+HOMEPAGE="https://github.com/nlohmann/json https://nlohmann.github.io/json/"
+SRC_URI="
+	https://github.com/nlohmann/json/archive/v${PV}.tar.gz -> ${P}.tar.gz
+	test? ( https://github.com/nlohmann/json_test_data/archive/v${TEST_VERSION}.tar.gz -> ${PN}-testdata-${TEST_VERSION}.tar.gz )"
+S="${WORKDIR}/json-${PV}"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="amd64 ~arm arm64 ppc ppc64 ~riscv x86"
+IUSE="test"
+RESTRICT="!test? ( test )"
+
+DOCS=( ChangeLog.md README.md )
+
+src_prepare() {
+	if use test ; then
+		ln -s "${WORKDIR}"/json_test_data-${TEST_VERSION} "${S}"/json_test_data || die
+	fi
+
+	cmake_src_prepare
+}
+
+src_configure() {
+	# Tests are built by default so we can't group the test logic below
+	local mycmakeargs=(
+		-DJSON_MultipleHeaders=ON
+		-DJSON_BuildTests=$(usex test)
+	)
+
+	# Define test data directory here to avoid unused var QA warning, bug #747826
+	use test && mycmakeargs+=( -DJSON_TestDataDirectory="${S}"/json_test_data )
+
+	cmake_src_configure
+}
+
+src_test() {
+	cd "${BUILD_DIR}"/tests || die
+
+	# git_required:
+	# Skip certain tests needing git per upstream
+	# https://github.com/nlohmann/json/issues/2189
+	#
+	# cmake_fetch_content_configure, cmake_fetch_content2_configure:
+	# Needs network (bug #865027, bug #865105)
+	local myctestargs=(
+		-E "(git_required|cmake_fetch_content_configure|cmake_fetch_content2_configure|cmake_fetch_content_build|cmake_fetch_content2_build)"
+	)
+
+	cmake_src_test
+}