Incompatible with Gradle 8.11: ClassNotFoundException: org.gradle.api.reporting.internal.TaskReportContainer

[jhonnen]

The plugin is currently not compatible with Gradle 8.11 because the internal class TaskReportContainer was removed.

org.gradle.api.tasks.TaskInstantiationException: Could not create task of type 'Cpd'.	
    at org.gradle.api.internal.project.taskfactory.TaskFactory$1.call(TaskFactory.java:95)	
    ...
Caused by: java.lang.NoClassDefFoundError: org/gradle/api/reporting/internal/TaskReportContainer	
    at de.aaschmid.gradle.plugins.cpd.Cpd.<init>(Cpd.java:97)	
    ...
Caused by: java.lang.ClassNotFoundException: org.gradle.api.reporting.internal.TaskReportContainer	
    at de.aaschmid.gradle.plugins.cpd.Cpd.<init>(Cpd.java:97)	
    at de.aaschmid.gradle.plugins.cpd.Cpd_Decorated.<init>(Unknown Source)

[aaschmid]

Thanks @jhonnen for reporting is. Do you already have a fix in mind and would like to contribute with a PR?

[jhonnen]

I don't have an obvious solution at the moment. The Gradle API doesn't seem to support report containers in 3rd party plugins.
In Gradle 8.11 they are implemented as follows:

public class JacocoReportsContainerImpl extends DelegatingReportContainer<ConfigurableReport> implements JacocoReportsContainer {

    @Inject
    public JacocoReportsContainerImpl(Describable owner, ObjectFactory objectFactory) {
        super(DefaultReportContainer.create(objectFactory, ConfigurableReport.class, factory -> ImmutableList.of(
            // ...
        )));
    }
    // ...
}

Both DelegatingReportContainer and DefaultReportContainer are still internal. You could of course just use that new internal API if you're OK with dropping support for Gradle <8.11

[cyanotyp]

Some updates and useful resources, that might help

• gradle 9.0 will also be affected
• 10 year old forums post https://discuss.gradle.org/t/how-do-you-create-a-reporting-plugin-without-using-internal-apis/3827
• 6 years old github issue Make TaskReportContainer public to ease implementation of ReportContainer gradle/gradle#7063

Seems they recommend to use the Reporting Interface to develop an own Reporter/Logger Class
-> which the code already does, my bad. not familiar with gradle plugin development!

• gradle reporting dsl: https://docs.gradle.org/current/dsl/org.gradle.api.reporting.Reporting.html
• https://github.com/gradle/gradle/blob/master/platforms/software/reporting/src/main/java/org/gradle/api/reporting/Reporting.java