enable build with Maven 4

[hboutemy]

build with Maven 4 in CI, to check if maven-plugin-tools 3.x works with Maven 4

and complete the table on https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=406620656#Maven4.0.0GAchecklist-Maven4API

[hboutemy]

[INFO] Maven Plugin Report Plugin ......................... FAILURE [01:11 min]

only reporting is failing for now, everything else is ok

ITs results:

[INFO] -------------------------------------------------
[INFO] Build Summary:
[INFO]   Passed: 1, Failed: 12, Errors: 0, Skipped: 0
[INFO] -------------------------------------------------
[ERROR] The following builds failed:
[ERROR] *  mplugin-191/pom.xml
[ERROR] *  mplugin-319_report-since/pom.xml
[ERROR] *  plugin-report-annotations/pom.xml
[ERROR] *  plugin-info-jdk/pom.xml
[ERROR] *  plugin-report-detect-requirements-history/pom.xml
[ERROR] *  plugin-info-jdk-default-version/pom.xml
[ERROR] *  fix-maven-since-3.x/pom.xml
[ERROR] *  mplugin-394_report-encoding/pom.xml
[ERROR] *  plugin-no-fork-report/pom.xml
[ERROR] *  plugin-report-with-javadoc-links/pom.xml
[ERROR] *  plugin-report/pom.xml
[ERROR] *  plugin-report-requirements-history/pom.xml
[INFO] -------------------------------------------------

11 first failing reporting ITs fail due to file: support in resolver

[DEBUG] Could not obtain transporter factory for local.central (file:///home/herve/.m2/repository, default, releases+snapshots)
org.eclipse.aether.transfer.NoTransporterException: Unsupported transport protocol file
    at org.eclipse.aether.transport.jdk.JdkTransporterFactory.newInstance(JdkTransporterFactory.java:72)
    at org.eclipse.aether.transport.jdk.JdkTransporterFactory.newInstance(JdkTransporterFactory.java:39)
    at org.eclipse.aether.internal.impl.DefaultTransporterProvider.newTransporter(DefaultTransporterProvider.java:70)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector.<init>(BasicRepositoryConnector.java:135)
[DEBUG] Replacing repositories from org.ow2.asm:asm-util:jar:9.9.1
    local.central (file:///home/herve/.m2/repository, default, releases+snapshots)
    central (https://repo.maven.apache.org/maven2, default, releases)
    ow2-snapshot (https://repository.ow2.org/nexus/content/repositories/snapshots, default, snapshots)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnectorFactory.newInstance(BasicRepositoryConnectorFactory.java:101)
    at org.eclipse.aether.internal.impl.DefaultRepositoryConnectorProvider.newRepositoryConnector(DefaultRepositoryConnectorProvider.java:82)
    at org.eclipse.aether.internal.impl.DefaultMetadataResolver$ResolveTask.run(DefaultMetadataResolver.java:521)
    at org.eclipse.aether.util.concurrency.RunnableErrorForwarder.lambda$wrap$0(RunnableErrorForwarder.java:66)
    at org.eclipse.aether.util.concurrency.SmartExecutor$Direct.submit(SmartExecutor.java:56)
    at org.eclipse.aether.internal.impl.DefaultMetadataResolver.resolve(DefaultMetadataResolver.java:320)
    at org.eclipse.aether.internal.impl.DefaultMetadataResolver.resolveMetadata(DefaultMetadataResolver.java:149)
    at org.apache.maven.impl.resolver.DefaultVersionResolver.resolveVersion(DefaultVersionResolver.java:165)
    at org.apache.maven.impl.resolver.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:134)
    at org.apache.maven.impl.resolver.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:105)
    at org.eclipse.aether.internal.impl.collect.DependencyCollectorDelegate.resolveCachedArtifactDescriptor(DependencyCollectorDelegate.java:484)
    at org.eclipse.aether.internal.impl.collect.bf.BfDependencyCollector.resolveDescriptorForVersion(BfDependencyCollector.java:482)
    at org.eclipse.aether.internal.impl.collect.bf.BfDependencyCollector.lambda$resolveArtifactDescriptorAsync$1(BfDependencyCollector.java:456)
    at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1716)
    at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:803)
    at org.eclipse.aether.internal.impl.collect.bf.BfDependencyCollector.lambda$resolveArtifactDescriptorAsync$4(BfDependencyCollector.java:455)
    at org.eclipse.aether.util.concurrency.SmartExecutor$Pooled.lambda$submit$1(SmartExecutor.java:106)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:545)
    at java.util.concurrent.FutureTask.run(FutureTask.java:328)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)
    at java.lang.Thread.run(Thread.java:1474)
[DEBUG] Could not obtain transporter factory for local.central (file:///home/herve/.m2/repository, default, releases+snapshots)
org.eclipse.aether.transfer.NoTransporterException: Unsupported transport protocol file
    at org.eclipse.aether.transport.apache.ApacheTransporterFactory.newInstance(ApacheTransporterFactory.java:77)
    at org.eclipse.aether.transport.apache.ApacheTransporterFactory.newInstance(ApacheTransporterFactory.java:38)
    at org.eclipse.aether.internal.impl.DefaultTransporterProvider.newTransporter(DefaultTransporterProvider.java:70)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector.<init>(BasicRepositoryConnector.java:135)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnectorFactory.newInstance(BasicRepositoryConnectorFactory.java:101)
    at org.eclipse.aether.internal.impl.DefaultRepositoryConnectorProvider.newRepositoryConnector(DefaultRepositoryConnectorProvider.java:82)
    at org.eclipse.aether.internal.impl.DefaultMetadataResolver$ResolveTask.run(DefaultMetadataResolver.java:521)

last plugin-report-requirements-history IT fails because of:

Caused by: java.lang.NullPointerException: Cannot invoke "org.codehaus.plexus.configuration.PlexusConfiguration.getChild(String)" because "this.configuration" is null
    at org.apache.maven.plugins.plugin.descriptor.EnhancedPluginDescriptorBuilder.build(EnhancedPluginDescriptorBuilder.java:74)
    at org.apache.maven.plugin.descriptor.PluginDescriptorBuilder.build(PluginDescriptorBuilder.java:66)

[ascheman]

Rebased onto current master to resolve the shared-workflow @v4→@v5 conflict, then pushed. CI is green against Maven 4.0.0-rc-6 (maven-gh-actions-shared@v5 defaults maven4-version to rc-6, so maven4-enabled: true alone verifies against rc-6). +1

[slachiewicz]

Please add maven version so we can avoid troubles in future with shared action update

[ascheman]

Please add maven version so we can avoid troubles in future with shared action update

Done, @slachiewicz — pinned maven4-version: 4.0.0-rc-6 explicitly in 1a903ed, so a future bump of the shared action's default won't silently change what the 3.x line is verified against. Thanks for the nudge.