build.gradle

task codeCoverageReport(type: JacocoReport) {
    executionData fileTree(project.rootDir.absolutePath).include("**/build/jacoco/*.exec")

    // Add all relevant sourcesets from the subprojects
    subprojects.each {
        sourceSets it.sourceSets.main
    }

    reports {
        xml.enabled = true
        xml.setDestination(new File("${buildDir}/reports/jacoco/report.xml"))
        html.setEnabled(true)
        html.setDestination(new File("${buildDir}/reports/jacoco/report.html"))
    }

    dependencies {
        subprojects {
            test
        }
    }
}