JAVA_PKG_IUSE="doc source test"

MAVEN_ID="org.antlr:antlr4-runtime:4.9.3"

JAVA_TESTING_FRAMEWORKS="junit-4"

MY_PN="${PN%-runtime}"

MY_P="${MY_PN}-${PV}"

DESCRIPTION="ANTLR 4 Runtime"

HOMEPAGE="https://www.antlr.org/"

SRC_URI="https://github.com/antlr/antlr4/archive/${PV}.tar.gz -> ${MY_P}.tar.gz"

SLOT="4"

DEPEND="

	>=virtual/jdk-1.8:*

	test? (

		~dev-java/antlr-tool-${PV}:${SLOT}

		dev-java/jol-core:0

	)

"

RDEPEND="

	>=virtual/jre-1.8:*

S="${WORKDIR}/${MY_PN}4-${PV}"

JAVA_SRC_DIR="runtime/Java/src"

JAVA_TEST_GENTOO_CLASSPATH="

	junit-4

	antlr-tool-${SLOT}

	jol-core

"

JAVA_TEST_SRC_DIR=(

	runtime-testsuite/test

	runtime-testsuite/annotations

)

JAVA_TEST_RESOURCE_DIRS=(

	runtime-testsuite/resources

)

src_prepare() {

	java-pkg_clean

	eapply "${FILESDIR}/${PV}-test-fixes.patch"

	java-pkg-2_src_prepare

}

src_test() {

	# Build classpath for tests

	# The JAR created during src_compile must appear in the classpath *before*

	# any dependencies to ensure that *it* is the JAR being tested; otherwise,

	# because the test suite depends on antlr-tool, which depends on this

	# package, the copy of this package's JAR installed on the system would be

	# tested instead when it appears earlier in the classpath, which might

	# cause test failures when the version being built differs from the version

	# already installed on the system, like https://bugs.gentoo.org/834138

	local CP="${S}/${JAVA_JAR_FILENAME}"

	local test_dep res_dir

	for test_dep in ${JAVA_TEST_GENTOO_CLASSPATH}; do

		CP+=":$(java-pkg_getjars --with-dependencies "${test_dep}")"

	done

	for res_dir in "${JAVA_TEST_RESOURCE_DIRS[@]}"; do

		CP+=":${res_dir}"

	done

	pushd "${JAVA_TEST_SRC_DIR[0]}" > /dev/null ||

		die "Failed to enter test source directory for ${PN}"

	einfo "Removing tests for non-Java runtimes ..."

	find org/antlr/v4/test/runtime/* -maxdepth 0 -type d \

		-not -name category -not -name descriptors -not -name java \

		-exec einfo "  {}" \; -exec rm -r "{}" + ||

		die "Failed to remove tests for non-Java runtimes"

	einfo "Generating ANTLR 4 parsers for tests ..."

	local java_exe="$(java-config -J)"

	local g4_files=( $(find * -name "*.g4") )

	local file

	for file in "${g4_files[@]}"; do

		local java_pkg="${file%/*.g4}"

		java_pkg="${java_pkg//\//.}"

		"${java_exe}" -cp "${CP}" org.antlr.v4.Tool \

			-visitor -package "${java_pkg}" "${file}" ||

			die "Failed to generate ANTLR 4 parser from ${file}"

	done

	# Create a list of tests to run

	# https://github.com/antlr/antlr4/blob/4.9.3/runtime-testsuite/pom.xml#L100

	# Excluding classes with "No runnable methods"

	local TESTS=$(find * -type f -name "Test*.java" \

		-not -name "TestContext.java" \

		-not -name "TestOutputReading.java"

	)

	TESTS="${TESTS//.java}"

	TESTS="${TESTS//\//.}"

	popd > /dev/null || die "Failed to leave test source directory for ${PN}"

	local classes="target/classes"

	# Compile the annotation processor of @CommentHasStringValue

	# before the test sources (requires tools.jar)

	ejavac -d "${classes}" -cp "${CP}:$(java-config -t)" \

		$(find runtime-testsuite/{annotations,processors} -name "*.java")

	local processor_cp="${classes}:runtime-testsuite/processors/resources"

	# Compile Java test sources, and process @CommentHasStringValue

	# annotations at the same time

	local javac_extra_args=()

	if ver_test "$(java-config -g PROVIDES_VERSION)" -ge 17; then

		javac_extra_args+=(

			-J--add-opens=jdk.compiler/com.sun.tools.javac.{main,model,tree,util}=ALL-UNNAMED

		)

	fi

	ejavac -d "${classes}" -cp "${CP}:${processor_cp}" \

		"${javac_extra_args[@]}" \

		$(find "${JAVA_TEST_SRC_DIR[@]}" -name "*.java")

	ejunit4 -classpath "${classes}:${CP}" ${TESTS}

}