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dev-java/log4j-core: simplify handling of the '-processor' option

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This package generates coding by using annotation processors. These
annotation processors and their '-processorpath' should be passed to
ejavac via the JAVAC_ARGS eclass variable. To do so, the processors must
either exist in another package or be compiled first. For compilation,
it needs '-classpath' which is built by java-pkg-simple_getclasspath().
This function however is marked '@INTERNAL' and cannot be used in an
ebuild. As a workaround, we run the whole java-pkg-simple_src_compile()
twice, first time for getting the processor as a class and second time
for letting the processor process the annotations during the regular
compilation.

Signed-off-by: Volkmar W. Pogatzki <gentoo@pogatzki.net>
Signed-off-by: Miroslav Šulc <fordfrog@gentoo.org>
This commit is contained in:
Volkmar W. Pogatzki 2025-11-11 15:24:49 +01:00 committed by Miroslav Šulc
parent 853b45bd74
commit 7d998890a8
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1 changed files with 7 additions and 20 deletions
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27
dev-java/log4j-core/log4j-core-2.25.2.ebuild
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@ -76,6 +76,8 @@ VERIFY_SIG_OPENPGP_KEY_PATH="/usr/share/openpgp-keys/logging.apache.org.asc"
src_prepare() {
java-pkg-2_src_prepare
# according to what we get from grep -nr '@ServiceProvider' log4j-core/*
mkdir -p log4j-core/src/main/resources/META-INF/services || die "mkdir"
pushd $_ >/dev/null || die "pushd"
echo "org.apache.logging.log4j.core.config.plugins.processor.GraalVmProcessor" \
@ -92,28 +94,13 @@ src_prepare() {
}
src_compile() {
# we run this twice, first time to get PluginProcessor into processorpath.
java-pkg-simple_src_compile
# Process the @Plugin annotation used on Log4j 2 built-in plugins
# to generate a serialized plugin listing file
# https://logging.apache.org/log4j/2.x/manual/plugins.html
local processor="org.apache.logging.log4j.core.config.plugins.processor.PluginProcessor"
local classes="target/classes"
local classpath="${JAVA_JAR_FILENAME}:$( \
java-pkg_getjars --build-only --with-dependencies \
"${JAVA_GENTOO_CLASSPATH},${JAVA_CLASSPATH_EXTRA}"):$( \
java-pkg_getjars --build-only --with-dependencies jakarta-activation-api-1)"
# Just in case java-pkg-simple.eclass changes the path in the future
mkdir -p "${classes}" || die "Failed to create directory for classes"
local sources_list_file="${T}/sources.lst"
find "${JAVA_SRC_DIR}" -type f -name "*.java" > "${sources_list_file}" || die
ejavac -d "${classes}" -cp "${classpath}" \
-proc:only -processor "${processor}" \
@"${sources_list_file}"
# Update the JAR to include the serialized plugin listing file
local jar="$(java-config -j)"
"${jar}" -uf "${JAVA_JAR_FILENAME}" -C "${classes}" . ||
die "Failed to update JAR"
# using PluginProcessor.class
JAVAC_ARGS=" -processorpath target/classes:$(java-pkg_getjars log4j-api) \
-processor org.apache.logging.log4j.core.config.plugins.processor.PluginProcessor"
java-pkg-simple_src_compile
# For versions/9, upstream packages only what's listed in log4j-core-java9/src/assembly/java9.xml
# We remove the jar, remove from target/classes what's not needed and re-create the jar.