dev-java/javacup: do not depend on jflex, build with bundled JFlex.jar

There is a circular dependency between javacup and jflex and in the past
we used to build jflex with a bundled javacup-runtime. The newer version
of jflex-1.9.1 however does not provide such bundled javacup-runtime.

For this reason we change the emege order to build javacup first using
its bundled bin/JFlex.jar.

Also, PORTAGE_QUIET=1 is re-added to allow re-compilation with itself
without receiving 'QA Notice: java-pkg_ensure-dep' (bug #937047).

Bug: https://bugs.gentoo.org/937047
Signed-off-by: Volkmar W. Pogatzki <gentoo@pogatzki.net>
Part-of: https://github.com/gentoo/gentoo/pull/44017
Signed-off-by: Sam James <sam@gentoo.org>

dev-java/javacup/javacup-11b_p20160615-r2.ebuild

@@ -0,0 +1,102 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+JAVA_PKG_IUSE="doc source"
+
+inherit java-pkg-2 java-pkg-simple
+
+DESCRIPTION="CUP Parser Generator for Java"
+HOMEPAGE="https://www2.cs.tum.edu/projects/cup/"
+SRC_URI="https://www2.cs.tum.edu/projects/cup/releases/java-cup-src-${PV/_p/-}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64 ~ppc64 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x64-solaris"
+IUSE="ant-task"
+
+DEPEND="
+	>=virtual/jdk-1.8:*
+	ant-task? ( >=dev-java/ant-1.10.15:0 )
+"
+
+RDEPEND="
+	>=virtual/jre-1.8:*
+	ant-task? ( >=dev-java/ant-1.10.15:0 )
+"
+
+DOCS=( changelog.txt )
+HTML_DOCS=( manual.html )
+
+JAVA_MAIN_CLASS="java_cup/Main"
+JAVA_SRC_DIR=( "src" "java" )
+
+src_prepare() {
+	java-pkg-2_src_prepare
+	if use ant-task; then
+		JAVA_GENTOO_CLASSPATH+="ant"
+	else
+		rm src/java_cup/anttask/CUPTask.java || die
+	fi
+}
+
+src_compile() {
+	if has_version \>=${CATEGORY}/${PN}-11b:${SLOT}; then
+		einfo "Get path of installed JAVACUP"
+		# PORTAGE_QUIET=1 to suppress "QA Notice: java-pkg_ensure-dep", bug #937047
+		CP_CUP="$(PORTAGE_QUIET=1 java-pkg_getjar --build-only javacup javacup.jar)"
+	else
+		einfo "Get path of bundled JAVACUP"
+		CP_CUP="$(echo bin/java-cup-*.jar)"
+	fi
+	einfo "Path to JAVACUP is ${CP_CUP}"
+
+	if has_version \~dev-java/jflex-1.9.1:0; then
+		einfo "Get path of installed jflex"
+		MAIN="jflex.Main"
+		CP_FLEX="$(PORTAGE_QUIET=1 java-pkg_getjar --build-only jflex jflex.jar)"
+	else
+		einfo "Get path to the bundled JFlex"
+		MAIN="JFlex.Main"
+		CP_FLEX="$(echo bin/JFlex.jar)"
+	fi
+	einfo "Path to JFlex is ${CP_FLEX}"
+
+	einfo "Generate parser with: ${CP_CUP}"
+	"$(java-config -J)" -jar "${CP_CUP}" \
+		-interface -destdir "java" -parser "parser" -symbols "sym" \
+		cup/parser.cup || die
+
+	einfo "Generate lexer"
+	# https://jflex.de/manual.html#running-jflex
+	$(java-config -J) -cp "${CP_CUP}:${CP_FLEX}" "${MAIN}" \
+		flex/Lexer.jflex -d java/javacup || die
+
+	einfo "Build intermediate jar"
+	JAVA_JAR_FILENAME="seco.jar"
+	java-pkg-simple_src_compile
+
+	einfo "Remove classes and generated code"
+	rm -rv java/* target/classes/ || die
+
+	einfo "Regenerate parser with intermediate jar file"
+	"$(java-config -J)" -jar ./seco.jar \
+		-interface -destdir "java" -parser "parser" -symbols "sym" \
+		cup/parser.cup || die
+
+	einfo "Regenerate lexer with intermediate jar file"
+	$(java-config -J) -cp "$(echo ./seco.jar):${CP_FLEX}" "${MAIN}" \
+		flex/Lexer.jflex -d java/javacup || die
+
+	einfo "Build final jar with regenerated parser and lexer"
+	JAVA_JAR_FILENAME="${PN}.jar"
+	java-pkg-simple_src_compile
+	"$(java-config --jar)" cvf "${PN}-runtime.jar" -C target/classes java_cup/runtime || die
+}
+
+src_install() {
+	java-pkg-simple_src_install
+	java-pkg_dojar "${PN}-runtime.jar"
+	use ant-task && java-pkg_register-ant-task
+}