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diff --git a/dev-java/protobuf-java/protobuf-java-4.29.4.ebuild b/dev-java/protobuf-java/protobuf-java-4.29.4.ebuild
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+++ b/dev-java/protobuf-java/protobuf-java-4.29.4.ebuild
@@ -0,0 +1,152 @@
+# Copyright 2008-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+JAVA_PKG_IUSE="doc source test"
+MAVEN_ID="com.google.protobuf:protobuf-java:${PV}"
+JAVA_TESTING_FRAMEWORKS="junit-4"
+
+inherit java-pkg-2 java-pkg-simple cmake
+
+DESCRIPTION="Core Protocol Buffers library"
+HOMEPAGE="https://protobuf.dev"
+# Currently we bundle the binary version of truth.jar used only for tests, we don't install it.
+# And we build artifact 4.29.3 from the 29.3 tarball in order to allow sharing the tarball with
+# dev-libs/protobuf.
+MY_PV4="${PV#4.}"
+MY_PV="${MY_PV4/_rc/-rc}"
+MY_P="protobuf-${MY_PV}.tar.gz"
+TV="1.1.3"
+SRC_URI="https://github.com/protocolbuffers/protobuf/releases/download/v${MY_PV}/${MY_P}
+ test? ( https://repo1.maven.org/maven2/com/google/truth/truth/${TV}/truth-${TV}.jar )"
+S="${WORKDIR}/protobuf-${MY_PV}"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64 ~ppc64 ~amd64-linux ~x86-linux ~x64-macos"
+IUSE="system-protoc"
+
+BDEPEND="
+ system-protoc? ( ~dev-libs/protobuf-${MY_PV4}:0[protoc] )
+ !system-protoc? ( >=dev-cpp/abseil-cpp-20230802.0 )
+"
+DEPEND="
+ >=virtual/jdk-1.8:*
+ test? (
+ dev-java/guava:0
+ dev-java/mockito:4
+ )
+"
+RDEPEND=">=virtual/jre-1.8:*"
+
+JAVA_AUTOMATIC_MODULE_NAME="com.google.protobuf"
+JAVA_JAR_FILENAME="protobuf.jar"
+JAVA_RESOURCE_DIRS="java/core/src/main/resources"
+JAVA_SRC_DIR="java/core/src/main/java"
+
+JAVA_TEST_GENTOO_CLASSPATH="guava,junit-4,mockito-4"
+JAVA_TEST_SRC_DIR="java/core/src/test/java"
+
+run-protoc() {
+ if use system-protoc; then
+ protoc $1
+ else
+ "${BUILD_DIR}"/protoc $1
+ fi
+}
+
+src_prepare() {
+ # If the corrsponding version of system-protoc is not available we build protoc locally
+ if ! use system-protoc; then
+ cmake_src_prepare
+ fi
+ java-pkg-2_src_prepare
+
+ # ${S}/java/core/generate-sources-build.xml
+ einfo "Replace variables in generate-sources-build.xml"
+ sed \
+ -e 's:${generated.sources.dir}:java/core/src/main/java:' \
+ -e 's:${protobuf.java_source.dir}:java/core/src/main/resources:' \
+ -e 's:${protobuf.source.dir}:src:' \
+ -e 's:^.*value="::' -e 's:\"/>::' \
+ -e '/project\|echo\|mkdir\|exec/d' \
+ -i java/core/generate-sources-build.xml || die "sed to sources failed"
+
+ # ${S}/java/core/generate-test-sources-build.xml
+ einfo "Replace variables in generate-test-sources-build.xml"
+ sed \
+ -e 's:${generated.testsources.dir}:java/core/src/test/java:' \
+ -e 's:${protobuf.source.dir}:src:' \
+ -e 's:${test.proto.dir}:java/core/src/test/proto:' \
+ -e 's:^.*value="::' -e 's:\"/>::' \
+ -e '/project\|mkdir\|exec\|Also generate/d' \
+ -i java/core/generate-test-sources-build.xml || die "sed to test sources failed"
+
+ # Split the file in two parts, one for each run-protoc call
+ awk '/--java_out/{x="test-sources-build-"++i;}{print > x;}' \
+ java/core/generate-test-sources-build.xml || die
+}
+
+src_configure() {
+ local mycmakeargs=(
+ -Dprotobuf_BUILD_TESTS=OFF
+ -Dprotobuf_ABSL_PROVIDER=package
+ )
+ if ! use system-protoc; then
+ cmake_src_configure
+ fi
+}
+
+src_compile() {
+ if ! use system-protoc; then
+ cmake_src_compile
+ fi
+
+ einfo "Run protoc to generate sources"
+ run-protoc \
+ @java/core/generate-sources-build.xml \
+ || die "protoc sources failed"
+
+ java-pkg-simple_src_compile
+}
+
+src_test() {
+ JAVA_GENTOO_CLASSPATH_EXTRA="${DISTDIR}/truth-${TV}.jar"
+
+ # google/protobuf/java_features.proto: File not found.
+ cp {java/core/src/main/resources,src}/google/protobuf/java_features.proto || die
+
+ einfo "Running protoc on first part of generate-test-sources-build.xml"
+ run-protoc @test-sources-build-1 \
+ || die "run-protoc test-sources-build-1 failed"
+
+ einfo "Running protoc on second part of generate-test-sources-build.xml"
+ run-protoc @test-sources-build-2 \
+ || die "run-protoc test-sources-build-2 failed"
+
+ # java/core/src/test/java/editions_unittest/TestDelimited.java:2867:
+ # error: package editions_unittest.MessageImport does not exist
+ rm java/core/src/test/java/com/google/protobuf/TextFormatTest.java || die
+
+ einfo "Running tests"
+ # Invalid test class 'map_test.MapInitializationOrderTest':
+ # 1. Test class should have exactly one public constructor
+ # Invalid test class 'protobuf_unittest.CachedFieldSizeTest':
+ # 1. Test class should have exactly one public constructor
+ pushd "${JAVA_TEST_SRC_DIR}" || die
+ local JAVA_TEST_RUN_ONLY=$(find * \
+ -path "**/*Test.java" \
+ ! -path "**/Abstract*Test.java" \
+ ! -name "MapInitializationOrderTest.java" \
+ ! -path '*protobuf_unittest/CachedFieldSizeTest.java'
+ )
+ popd
+ JAVA_TEST_RUN_ONLY="${JAVA_TEST_RUN_ONLY//.java}"
+ JAVA_TEST_RUN_ONLY="${JAVA_TEST_RUN_ONLY//\//.}"
+ java-pkg-simple_src_test
+}
+
+src_install() {
+ java-pkg-simple_src_install
+}