Make jdk.jfr import optional in OSGi manifest

[Copilot]

The junit-platform-launcher OSGi manifest declares a hard dependency on jdk.jfr, causing resolution failures on stripped-down JVMs without Flight Recorder support.

Changes

Modified gradle/plugins/common/src/main/kotlin/junitbuild.osgi-conventions.gradle.kts:

• Added jdk.jfr;resolution:="optional" to global Import-Package instructions
• Removed jdk.jfr from -runsystempackages (OSGi resolver configuration)
• Added fixupmessages rule to suppress warnings when modules don't use JFR

The Flight Recorder feature already gracefully degrades at runtime via JfrUtils.isJfrAvailable() reflection checks. This change aligns the OSGi metadata with that design.

Result

OSGi manifest before:

Import-Package: ...,jdk.jfr,org.junit.platform.commons;...

OSGi manifest after:

Import-Package: ...,jdk.jfr;resolution:=optional,org.junit.platform.commons;...

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• ge.junit.org
  • Triggering command: /usr/lib/jvm/temurin-25-jdk-amd64/bin/java --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-opens=java.base/java.nio.charset=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED --add-opens=java.base/java.time=ALL-UNNAMED --enable-native-access=ALL-UNNAMED -XX:MaxMetaspaceSize=512m -XX:+HeapDumpOnOutOfMemoryError -Xmx1g -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant -cp /home/REDACTED/.gradle/wrapper/dists/gradle-9.1.0-bin/9agqghryom9wkf8r80qlhnts3/gradle-9.1.0/lib/gradle-daemon-main-9.1.0.jar -javaagent:/home/REDACTED/.gradle/wrapper/dists/gradle-9.1.0-bin/9agqghryom9wkf8r80qlhnts3/gradle-9.1.0/lib/agents/gradle-instrumentation-agent-9.1.0.jar org.gradle.launcher.daemon.bootstrap.GradleDaemon 9.1.0 (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Make the imports for flight recorder in junit-platform-launcher optional

Currently the junit-platform-launcher has a hard dependecy in its OSGi manifest to the java flight recorder.

This can laead to resolve problems on stripped down JVMs as the system package jdk.jfr is possibly missing there

As the flightrecorder feature is optional, the packages should be imported only optional in the OSGi manifest generated with the bndlib framework.

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[laeubi]

Merged as junit-team#5092