apply plugin: 'jacoco'

jacoco {
    toolVersion = "0.8.6"
}

tasks.withType(Test) {
    jacoco.includeNoLocationClasses = true
    jacoco.excludes = ['jdk.internal.*']
}

project.afterEvaluate {
    def buildTypes = android.buildTypes.collect { type -> type.name }
    def productFlavors = android.productFlavors.collect { flavor -> flavor.name }

    if (!productFlavors) productFlavors.add('')

    productFlavors.each { productFlavorName ->
        buildTypes.each { buildTypeName ->
            def testTaskName = "test${buildTypeName.capitalize()}UnitTest"

            task "${testTaskName}JacocoCoverage" (type:JacocoReport, dependsOn: "$testTaskName") {
                group = "Reporting"
                description = "Generate Jacoco coverage reports on the ${buildTypeName.capitalize()} build."

                def excludes = ['**/R.class', '**/R$*.class', '**/BuildConfig.*', '**/Manifest*.*', '**/*Test*.*', 'android/**/*.*' ]

                def coverageSourceDirs = [
                        "src/main/java",
                        "src/$productFlavorName/java",
                        "src/$buildTypeName/java"
                ]

                // java compiled classes
                def javaTree = fileTree(dir: "$buildDir/intermediates/javac/$buildTypeName/classes", excludes: excludes)
                // kotlin compiled classes (to be used in the future)
                def kotlinTree = fileTree(dir: "$buildDir/tmp/kotlin-classes/$buildTypeName", excludes: excludes)
                classDirectories.from = files([javaTree, kotlinTree])
                additionalSourceDirs.from = files(coverageSourceDirs)
                sourceDirectories.from = files(coverageSourceDirs)
                executionData.from = files("${buildDir}/jacoco/${testTaskName}.exec")

                reports {
                    xml.required = true
                    html.required = true
                }
            }
        }
    }
}