Merging of Jacoco Reports Fails in Gradle 4.0

[romeara]

Reports seem to have moved in newer versions of Gradle - investigate behavior in a Gradle 4.0 environment and verify if breaking changes need to be addressed for compatibility

[romeara]

Clarification: It appears the report generates, but in HTML instead of XML...

[romeara]

It appears this is due to the underlying Gradle API changing enough that the plug-ins setup does not get applied when used in a Gradle 4.0+ project. This can be worked around by adding the following to the root project's configuration after applying the merge coverage report's plug-in:

mergeCoverageReports {
    reports {
        xml.enabled true
        html.enabled false
        csv.enabled false
        
        xml.destination = "${buildDir}/reports/jacoco/report.xml"
    }
}

As a result, this will need to wait until Gradle 3.x support is dropped for an integrated fix