jacoco.gradle

apply plugin: 'jacoco'

jacoco {
    toolVersion = "0.8.7"
}

tasks.withType(Test) {
    jacoco.includeNoLocationClasses = true
    jacoco.excludes = ['jdk.internal.*']
    // see related issue https://github.com/gradle/gradle/issues/5184#issuecomment-457865951
}

project.afterEvaluate {

    (android.hasProperty('applicationVariants')
            ? android.'applicationVariants'
            : android.'libraryVariants')
            .all { variant ->
                def variantName = variant.name
                def unitTestTask = "test${variantName.capitalize()}UnitTest"

                tasks.create(name: "${unitTestTask}Coverage", type: JacocoReport, dependsOn: [
                        "$unitTestTask"
                ]) {
                    group = "Reporting"
                    description = "Generate Jacoco coverage reports for the ${variantName.capitalize()} build"

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

                    def excludes = [
                            // data binding
                            'android/databinding/**/*.class',
                            '**/android/databinding/*Binding.class',
                            '**/android/databinding/*',
                            '**/androidx/databinding/*',
                            '**/BR.*',
                            // android
                            '**/R.class',
                            '**/R$*.class',
                            '**/BuildConfig.*',
                            '**/Manifest*.*',
                            '**/*Test*.*',
                            'android/**/*.*',
                            // butterKnife
                            '**/*$ViewInjector*.*',
                            '**/*$ViewBinder*.*',
                            '**/*ViewBinding*.*',
                            // dagger
                            '**/*_MembersInjector.class',
                            '**/Dagger*Component.class',
                            '**/Dagger*Component$Builder.class',
                            '**/*Module_*Factory.class',
                            '**/di/*',
                            '**/*_Factory*.*',
                            '**/*Module*.*',
                            '**/*Dagger*.*',
                            '**/*Hilt*.*',
                            // kotlin
                            '**/*MapperImpl*.*',
                            '**/*$ViewInjector*.*',
                            '**/*$ViewBinder*.*',
                            '**/BuildConfig.*',
                            '**/*Component*.*',
                            '**/*BR*.*',
                            '**/Manifest*.*',
                            '**/*$Lambda$*.*',
                            '**/*Companion*.*',
                            '**/*Module*.*',
                            '**/*Dagger*.*',
                            '**/*Hilt*.*',
                            '**/*MembersInjector*.*',
                            '**/*_MembersInjector.class',
                            '**/*_Factory*.*',
                            '**/*_Provide*Factory*.*',
                            '**/*Extensions*.*',
                            // sealed and data classes
                            '**/*$Result.*',
                            '**/*$Result$*.*'
                    ]

                    def javaClasses = fileTree(dir: variant.javaCompileProvider.get().destinationDir,
                            excludes: excludes)
                    def kotlinClasses = fileTree(dir: "${buildDir}/tmp/kotlin-classes/${variantName}",
                            excludes: excludes)

                    classDirectories.setFrom(files([
                            javaClasses,
                            kotlinClasses
                    ]))

                    def variantSourceSets = variant.sourceSets.java.srcDirs.collect { it.path }.flatten()
                    sourceDirectories.setFrom(project.files(variantSourceSets))

                    executionData(files([
                            "$project.buildDir/jacoco/${unitTestTask}.exec"
                    ]))
                }

            }


}