build.gradle

plugins {
    id "java"
    id "jacoco"
    id "org.sonarqube" version "4.2.1.3168"
}

allprojects {
    repositories {
        mavenCentral()
    }
}

subprojects {
    apply plugin: 'org.sonarqube'
    sonar {
        properties {
            property 'sonar.coverage.jacoco.xmlReportPaths', "$projectDir.parentFile.path/build/reports/jacoco/codeCoverageReport/codeCoverageReport.xml"
        }
    }

    tasks.withType(Test).configureEach {
        maxParallelForks 3
        useJUnitPlatform()
    }
}

apply from: "$project.rootDir/sonar.gradle"

// $ ./gradlew test codeCoverageReport
tasks.register("codeCoverageReport", JacocoReport) {
    // If a subproject applies the 'jacoco' plugin, add the result it to the report
    subprojects { subproject ->
        subproject.plugins.withType(JacocoPlugin).configureEach {
            subproject.tasks.matching({ t -> t.extensions.findByType(JacocoTaskExtension) }).configureEach { testTask ->
                //the jacoco extension may be disabled for some projects
                if (testTask.extensions.getByType(JacocoTaskExtension).isEnabled()) {
                    sourceSets subproject.sourceSets.main
                    executionData(testTask)
                } else {
                    logger.warn('Jacoco extension is disabled for test task \'{}\' in project \'{}\'. this test task will be excluded from jacoco report.',testTask.getName(),subproject.getName())
                }
            }

            subproject.tasks.matching({ t -> t.extensions.findByType(JacocoTaskExtension) }).forEach {
                rootProject.tasks.codeCoverageReport.dependsOn(it)
            }
        }
    }

    // enable the different report types (html, xml, csv)
    reports {
        xml.required = true
        html.required = true
        html.outputLocation = layout.buildDirectory.dir('jacocoHtml')
    }
}