Enable Maven 4

[Bukama]

No description provided.

[Bukama]

Note: This PR is for checking build status for Maven 4.0.0 according to checklist https://cwiki.apache.org/confluence/display/MAVEN/Maven+4.0.0+GA+checklist

[Bukama]

D:\Github\Maven\maven-jmod-plugin>mvn --version
Apache Maven 4.0.0-rc-5 (fb3ecaef88106acb40467a450248dfdbd75f3b35)
Maven home: C:\apache-maven-4.0.0-rc-5
Java version: 25.0.2, vendor: Azul Systems, Inc., runtime: C:\Program Files\Zulu\zulu-25
Default locale: de_DE, platform encoding: UTF-8
OS name: "windows 11", version: "10.0", arch: "amd64", family: "winnt"


[INFO] Build Summary:
[INFO]   Passed: 8, Failed: 7, Errors: 0, Skipped: 0
[INFO] -------------------------------------------------
[ERROR] The following builds failed:
[ERROR] *  buildinfo-mono\pom.xml
[ERROR] *  buildinfo-multi\pom.xml
[ERROR] *  buildinfo-skip-install-deploy\pom.xml
[ERROR] *  compare-flatten\pom.xml
[ERROR] *  compare-mono\pom.xml
[ERROR] *  compare-resume\pom.xml
[ERROR] *  git-multi\pom.xml

buildinfo-mono
buildinfo-multi

(Logs from buildinfo-mono)

Assertion expects two output entries, the first beeing the buildinfo (ok), the second the jar. But the jar is the third when building with Maven 4. The second is outputs.1.filename=mono-1.0-SNAPSHOT-build.pom according to logs. But in directory there is only consumer-17696942139801610378.pom (next to buildinfo and jar).

Assertion failed: 

assert buildinfo.contains( "outputs.1.filename=mono-1.0-SNAPSHOT.jar" )
       |         |
       |         false
       '# https://reproducible-builds.org/docs/jvm/\r\nbuildinfo.version=1.0-SNAPSHOT\r\n\r\nname=mono\r\ngroup-id=org.apache.maven.plugins.it\r\nartifact-id=mono\r\nversion=1.0-SNAPSHOT\r\n\r\n# source information\r\nsource.scm.uri=scm:git:https://gitbox.apache.org/repos/asf/maven-studies.git\r\nsource.scm.tag=maven-buildinfo-plugin\r\n\r\n# build instructions\r\nbuild-tool=mvn\r\n\r\n# effective build environment information\r\njava.version=25.0.2\r\njava.vendor=Azul Systems, Inc.\r\nos.name=Windows 11\r\nos.version=10.0\r\nos.arch=amd64\r\nline.separator=\\r\\n\r\n\r\n# Maven rebuild instructions and effective environment\r\nmvn.version=4.0.0-rc-5\r\nmvn.minimum.version=3.0.5\r\nmvn.rebuild-args=-Dmaven.session.versionFilter=e(org.slf4j:slf4j-api:(1.7.36,))\r\n\r\n# output\r\n\r\noutputs.0.groupId=org.apache.maven.plugins.it\r\noutputs.0.filename=mono-1.0-SNAPSHOT.pom\r\noutputs.0.length=1921\r\noutputs.0.checksums.sha512=57f42bf97a0d1359d1038e79f0005b238e5154a818e2ca0e83d72210d4bb2f6a34c6c07bd83ebcee54b80bb6d7ea23e31900bbb32eba40437e408ca2028287bc\r\n\r\noutputs.1.groupId=org.apache.maven.plugins.it\r\noutputs.1.filename=mono-1.0-SNAPSHOT-build.pom\r\noutputs.1.length=2799\r\noutputs.1.checksums.sha512=e88e93cd200d2a75653ee28e759b1bd081d19b15f57a0ddffc96d54d6b8917f4d2bd4a8a3881a16822c4203dd59990eba4881629686243a4fe438f67703440d1\r\n\r\noutputs.2.groupId=org.apache.maven.plugins.it\r\noutputs.2.filename=mono-1.0-SNAPSHOT.jar\r\noutputs.2.length=2403\r\noutputs.2.checksums.sha512=43a38add4e1c1f1d568b7307f3fc6354a6b283083827256b8e9f43df1a22aac5e3e7190815619a4af0b0cee95cbf77369147eafcb6d63759e2d85bbb7ae563ab\r\n'

buildinfo-skip-install-deploy
compare-flatten
compare-resume
git-multi

These have the following build error (logs from buildinfo-skip-install-deploy)

[INFO] Reactor Summary for multi 1.0-SNAPSHOT:
[INFO] 
[INFO] multi .............................................. FAILURE [  0.532 s]
[INFO] multi-module module that skips install ............. SKIPPED
[INFO] multi-module module that skips deploy .............. SKIPPED
[INFO] multi-module module that will be skipped by configuring artifact plugin with skipModules SKIPPED
[INFO] multi-module module A .............................. SKIPPED
[INFO] multi-module module B .............................. SKIPPED
[INFO] last module, that skips install .................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.701 s
[INFO] Finished at: 2026-05-18T20:52:12+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-artifact-plugin:3.6.2-SNAPSHOT:buildinfo (default) on project multi: Execution default of goal org.apache.maven.plugins:maven-artifact-plugin:3.6.2-SNAPSHOT:buildinfo failed: Cannot invoke "org.apache.maven.model.PluginManagement.getPluginsAsMap()" because the return value of "org.apache.maven.project.MavenProject.getPluginManagement()" is null -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-artifact-plugin:3.6.2-SNAPSHOT:buildinfo (default) on project multi: Execution default of goal org.apache.maven.plugins:maven-artifact-plugin:3.6.2-SNAPSHOT:buildinfo failed: Cannot invoke "org.apache.maven.model.PluginManagement.getPluginsAsMap()" because the return value of "org.apache.maven.project.MavenProject.getPluginManagement()" is null

compare-mono

Build error on compare goal

[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  5.168 s
[INFO] Finished at: 2026-05-18T20:52:49+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-artifact-plugin:3.6.2-SNAPSHOT:compare (default-cli) on project mono: Rebuilt artifacts are different from reference -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-artifact-plugin:3.6.2-SNAPSHOT:compare (default-cli) on project mono: Rebuilt artifacts are different from reference

[Bukama]

Working on it

[Bukama]

Rebased branch on current master

buildinfo-skip-install-deploy
compare-flatten
compare-resume
git-multi

Setting install and deploy-plugin in plugin-management to parent version fixes the compile errors.
compare-resume and git-multi tests are green with those versions.

buildinfo-skip-install-deploy
compare-flatten

still fail, due other file order with the Maven 4 build-pom (like the two other tests above), so we need to have different assertions in maven 3/4. I will adjust this.

compare-mono fails due RAT missing licences in build-info. Will exclude this next time and test further.

[Bukama]

Local build Maven 4.0.0-rc5

[INFO] BUILD SUCCESS
[INFO] --------------------------------------------------------------------------------------------------------------------------
[INFO] Total time:  02:59 min
[INFO] Finished at: 2026-06-11T21:16:51+02:00

Local build with Maven 3.9.16

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  03:01 min
[INFO] Finished at: 2026-06-11T21:27:46+02:00
[INFO] ------------------------------------------------------------------------

edit: But GHA build fails to spotless in two IT poms - will fix.
edit 2: Fixed

[Bukama]

Summary:

• Used fixed versions for plugins (esp. install-p and deploy-p)
• Configure a-rat-p to exclude build-info.log.1 if IT's parent is a specific maven-parent (and not default-parent)
• Adjust assertions
  ** File indexes in .buildinfo die additional -build.pom
  ** Adjust other remote-repository when using Maven 4 (onlye one remote-repo in basedir, but not in every subproject folder)
  ** Exclude -build.pom when existence of .buildinfo is checked

[hboutemy]

great job, thanks

[github-actions]

@Bukama Please assign appropriate label to PR according to the type of change.