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diff --git a/dev-java/jflex/jflex-1.9.1-r1.ebuild b/dev-java/jflex/jflex-1.9.1-r1.ebuild
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+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+JAVA_PKG_IUSE="doc source test"
+JAVA_TESTING_FRAMEWORKS="junit-4"
+
+inherit java-pkg-2 java-pkg-simple
+
+DESCRIPTION="JFlex is a lexical analyzer generator for Java"
+HOMEPAGE="https://www.jflex.de/"
+SRC_URI="https://github.com/jflex-de/jflex/releases/download/v${PV}/${P}.tar.gz"
+S="${WORKDIR}/${P}"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64 ~ppc-macos ~x64-macos"
+IUSE="ant-task examples test vim-syntax"
+REQUIRED_USE="test? ( ant-task )"
+
+# jdk-11:* for bug #963787
+# <dev-java/ognl-3.1.25:0 because of test failures with 3.1.25 or higher
+DEPEND="
+	>=virtual/jdk-11:*
+	dev-java/auto-value:0
+	dev-java/escapevelocity:0
+	dev-java/incap:0
+	>=dev-java/javacup-11b_p20160615-r2:0
+	dev-java/javapoet:0
+	dev-java/jsr305:0
+	ant-task? ( >=dev-java/ant-1.10.15:0 )
+	test? (
+		dev-java/antlr-runtime:3.5
+		dev-java/generics-resolver:0
+		>=dev-java/guava-33.4.8:0
+		dev-java/javaruntype:0
+		dev-java/junit-quickcheck:0
+		<dev-java/ognl-3.1.25:0
+		dev-java/slf4j-simple:0
+		dev-java/truth:0
+	)
+"
+
+RDEPEND="
+	>=virtual/jre-1.8:*
+	ant-task? ( >=dev-java/ant-1.10.15:0 )
+	vim-syntax? ( || ( app-editors/vim app-editors/gvim ) )
+"
+
+DOCS=( {changelog,README}.md )
+JAVA_CLASSPATH_EXTRA="auto-value,javacup,jsr305"
+JAVA_MAIN_CLASS="jflex.Main"
+JAVA_RESOURCE_DIRS="src/main/resources"
+JAVA_SRC_DIR="src/main/java"
+
+JAVA_TEST_GENTOO_CLASSPATH="
+	ant
+	antlr-runtime-3.5
+	generics-resolver
+	guava
+	javaruntype
+	junit-4
+	junit-quickcheck
+	ognl
+	slf4j-simple
+	truth
+"
+
+JAVA_TEST_RESOURCE_DIRS="src/test/resources"
+JAVA_TEST_SRC_DIR="src/test/java"
+
+src_prepare() {
+	java-pkg-2_src_prepare
+
+	# Keep pre-compiled jar for generating LexScan.java
+	# It includes java_cup/runtime
+	java-pkg_clean ! -path "./lib/jflex-full-${PV}.jar"
+
+	# No need for that stuff
+	rm -r src/generated || die "rm generated"
+
+	# Providing ant-task would require dev-java/ant in dependencies.
+	if use ant-task; then
+		JAVA_GENTOO_CLASSPATH_EXTRA+=":$(java-pkg_getjar --build-only ant ant.jar)"
+	else
+		rm src/main/java/jflex/anttask/JFlexTask.java || die
+	fi
+}
+
+jflex_compile() {
+	$(java-config -J) "${@}" jflex.Main \
+		-d src/main/java \
+		--skel src/main/jflex/skeleton.nested \
+		src/main/jflex/LexScan.flex || die
+	java-pkg-simple_src_compile
+}
+
+src_compile() {
+	# get processorpath
+	local pp="$(java-pkg_getjar --build-only auto-value auto-value.jar)"
+	pp="${pp}:$(java-pkg_getjar --build-only auto-value auto-common.jar)"
+	pp="${pp}:$(java-pkg_getjars --build-only escapevelocity,guava,incap,javapoet)"
+
+	JAVAC_ARGS="-processorpath ${pp} -s src/main/java"
+
+	JAVACUP=$(java-pkg_getjar --build-only javacup javacup.jar)
+	java -jar "${JAVACUP}" -destdir ${JAVA_SRC_DIR} -package ${PN} \
+		-parser LexParse -interface src/main/cup/LexParse.cup || die
+
+	einfo "Generate LexScan.java using pre-compiled jar"
+	jflex_compile -cp "lib/jflex-full-${PV}.jar"
+
+	einfo "Remove and re-generate LexScan.java using the freshly built jar"
+	rm -v src/main/java/LexScan.java || die "rm LexScan.java"
+	rm -r target || die
+	jflex_compile -cp "${JAVACUP}:jflex.jar"
+}
+
+src_test() {
+	local TESTS=$(find src/test/java \( -name "*Test.java" -o -name "*Quickcheck.java" \) -printf "%P\n")
+	TESTS="${TESTS//.java}"
+	JAVA_TEST_RUN_ONLY="${TESTS//\//.}"
+
+	java-pkg-simple_src_test
+}
+
+src_install() {
+	java-pkg-simple_src_install
+
+	use ant-task && java-pkg_register-ant-task
+
+	use examples && java-pkg_doexamples examples
+
+	if use doc; then
+		dodoc doc/*.pdf
+		docinto html
+		dodoc doc/*.{css,html,png} doc/COPYRIGHT
+	fi
+
+	if use vim-syntax; then
+		insinto /usr/share/vim/vimfiles/syntax
+		doins lib/${PN}.vim
+	fi
+}