Gradle Jacoco config for Android (3.x plugin) with kotlin and custom excludes support

jacoco.gradle

apply plugin: "jacoco"

jacoco {
    toolVersion = deps.test.jacocoVersion
}

tasks.withType(Test) {
    jacoco.includeNoLocationClasses = true
}

task('jacocoReports') {
    group = "Reporting"
    description = "Generate Jacoco coverage reports for all variants"
}

task('jacocoVerifications') {
    group = "Verification"
    description = "Generate Jacoco coverage reports for all variants"
}

variants().all { variant ->
    def params = prepareJacocoParams(variant)
    def reportTask = createReportTask(params)
    def verificationTask = createVerificationTask(params)
    verificationTask.dependsOn reportTask
    jacocoReports.dependsOn reportTask
}

def prepareJacocoParams(variant) {
    def params = [:]
    params.variantName = variant.name
    params.variantCapName = variant.name.capitalize()
    params.fileFilter = [ '**/R.class', '**/R$*.class', '**/BuildConfig.*', '**/Manifest*.*', '**/*Test*.*', 'android/**/*.*', 
            // '**/App*.*',
            // '**/*Activity*.*',
            ]
    params.classDirectories = files([fileTree(
            dir: variant.javaCompiler.destinationDir,
            excludes: params.fileFilter
    ) + fileTree(
            dir: "$buildDir/tmp/kotlin-classes/$params.variantName",
            excludes: params.fileFilter
    )])
    
    params.sourceDirectories = files([
            "src/main/java", "src/main/kotlin",
            "src/$params.variantName/java", "src/$params.variantName/kotlin"
    ])
    params.executionData = files("${buildDir}/jacoco/junitPlatformTest${params.variantCapName}.exec")
    return params
}

def createReportTask(params) {
    return task("jacoco${params.variantCapName}Report", type: JacocoReport, dependsOn: "test${params.variantCapName}UnitTest") {
        group = "Reporting"
        description = "Generate Jacoco coverage reports for $params.variantCapName"
        reports {
            xml.enabled = true
            html.enabled = true
            csv.enabled = false
        }
        classDirectories = params.classDirectories
        sourceDirectories = params.sourceDirectories
        executionData = params.executionData
    }
}

def createVerificationTask(params) {
    return task("jacoco${params.variantCapName}Verification", type: JacocoCoverageVerification) {
        sourceDirectories = params.sourceDirectories
        classDirectories = params.classDirectories
        executionData = params.executionData
        violationRules {
            failOnViolation true
            rule {
                element = 'PACKAGE'
                includes = ['com.myapp.domain.*']
                excludes = ['com.myapp.domain.entity']
                limit {
                    counter = 'CLASS'
                    value = 'MISSEDCOUNT'
                    maximum = 0
                }
            }
            rule {
                element = 'CLASS'
                includes = ['com.myapp.domain.*']
                excludes = ['com.myapp.domain.entity.*']
                limit {
                    counter = 'INSTRUCTION'
                    value = 'COVEREDRATIO'
                    minimum = 0.8
                }
            }
        }
    }
}

def variants() {
    if (project.android.hasProperty('libraryVariants')) {
        return project.android.libraryVariants
    } else {
        return project.android.applicationVariants
    }
}

Thanks!

@almozavr Thanks for this code snippet.
Unfortunately to make it work (on Gradle 4.4 and Android plugin 3.1.3) you need to change executionData file name to
files("${buildDir}/jacoco/test${variantCapName}UnitTest.exec")

As of today this still works (when using @amatkivskiy change)

Thanks, i had to change @amatkivskiy 's change to files("${buildDir}/jacoco/test${params.variantCapName}UnitTest.exec") to make it work.