Change javac executable used by quarkus-maven-plugin about quarkus

[quarkus-bot]

/cc @quarkusio/devtools (maven)

[gastaldi]

Sounds like a good first issue, want to submit a PR?

[w0pp]

I gave it a shot, assuming that it would be as easy as adding a new property for the executable path and passing it to the MavenDevModeLauncher.Builder, just like compilerArgs. But it seems like the problem actually lies in GenerateCodeMojo, and I have no idea how to go about making it use a different Java path. It would probably require some major changes.
There's also this line that scared me:
<!-- Not sure exactly why but the Maven plugins need to be compiled with Java 11 -->

I don't think this is a good first issue but would instead require someone quite familiar with developing Maven plugins and Quarkus code generation, which I am definitely not.

For anyone deciding to look into this, here's the stack trace I get when running mvnw clean package with JAVA_HOME set to jdk11 and the project requiring jdk17, with maven-compiler-plugin's <executable> property set to jdk17 javac:

[INFO] Scanning for projects...
[WARNING] ClassRealm[extension>io.quarkus.platform:quarkus-maven-plugin:3.8.1, parent: java.net.URLClassLoader@2c9f9fb0]
com.google.inject.CreationException: Unable to create injector, see the following errors:

1) [Guice/MissingImplementation]: No implementation for QuarkusBootstrapProvider annotated with interface TypeArguments$Implicit was bound.

Did you mean?
    QuarkusBootstrapProvider bound at LocatorWiring

Requested by:
1  : LocatorWiring

Learn more:
  https://github.com/google/guice/wiki/MISSING_IMPLEMENTATION

1 error

======================
Full classname legend:
======================
LocatorWiring:            "org.eclipse.sisu.wire.LocatorWiring"
QuarkusBootstrapProvider: "io.quarkus.maven.QuarkusBootstrapProvider"
TypeArguments$Implicit:   "org.eclipse.sisu.inject.TypeArguments$Implicit"
========================
End of classname legend:
========================

    at com.google.inject.internal.Errors.throwCreationExceptionIfErrorsExist (Errors.java:576)
    at com.google.inject.internal.InternalInjectorCreator.initializeStatically (InternalInjectorCreator.java:163)
    at com.google.inject.internal.InternalInjectorCreator.build (InternalInjectorCreator.java:110)
    at com.google.inject.Guice.createInjector (Guice.java:87)
    at com.google.inject.Guice.createInjector (Guice.java:69)
    at com.google.inject.Guice.createInjector (Guice.java:59)
    at org.codehaus.plexus.DefaultPlexusContainer.addPlexusInjector (DefaultPlexusContainer.java:482)
    at org.codehaus.plexus.DefaultPlexusContainer.discoverComponents (DefaultPlexusContainer.java:461)
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.discoverPluginComponents (DefaultMavenPluginManager.java:410)
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.setupExtensionsRealm (DefaultMavenPluginManager.java:804)
    at org.apache.maven.project.DefaultProjectBuildingHelper.createProjectRealm (DefaultProjectBuildingHelper.java:177)
    at org.apache.maven.project.DefaultModelBuildingListener.buildExtensionsAssembled (DefaultModelBuildingListener.java:92)
    at org.apache.maven.model.building.ModelBuildingEventCatapult$1.fire (ModelBuildingEventCatapult.java:40)
    at org.apache.maven.model.building.DefaultModelBuilder.fireEvent (DefaultModelBuilder.java:1269)
    at org.apache.maven.model.building.DefaultModelBuilder.build (DefaultModelBuilder.java:474)
    at org.apache.maven.model.building.DefaultModelBuilder.build (DefaultModelBuilder.java:455)
    at org.apache.maven.project.DefaultProjectBuilder.build (DefaultProjectBuilder.java:612)
    at org.apache.maven.project.DefaultProjectBuilder.build (DefaultProjectBuilder.java:375)
    at org.apache.maven.graph.DefaultGraphBuilder.collectProjects (DefaultGraphBuilder.java:349)
    at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor (DefaultGraphBuilder.java:340)
    at org.apache.maven.graph.DefaultGraphBuilder.build (DefaultGraphBuilder.java:76)
    at org.apache.maven.DefaultMaven.buildGraph (DefaultMaven.java:448)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:197)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:173)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:101)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:906)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:283)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:206)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:283)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:226)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:407)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:348)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.apache.maven.wrapper.BootstrapMainStarter.start (BootstrapMainStarter.java:52)
    at org.apache.maven.wrapper.WrapperExecutor.execute (WrapperExecutor.java:161)
    at org.apache.maven.wrapper.MavenWrapperMain.main (MavenWrapperMain.java:73)


[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  3.879 s
[INFO] Finished at: 2024-03-02T20:39:51+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal io.quarkus.platform:quarkus-maven-plugin:3.8.1:generate-code (default) on project backend: Execution default of goal io.quarkus.platform:quarkus-maven-plugin:3.8.1:generate-code failed: Unable to load the mojo 'generate-code' (or one of its required components) from the plugin 'io.quarkus.platform:quarkus-maven-plugin:3.8.1': java.util.NoSuchElementException
[ERROR]       role: org.apache.maven.plugin.Mojo
[ERROR]   roleHint: io.quarkus.platform:quarkus-maven-plugin:3.8.1:generate-code
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException