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project.afterEvaluate {
  // Grab all build types and product flavors
  def buildTypes = android.buildTypes.collect { type -> type.name }
  def productFlavors = android.productFlavors.collect { flavor -> flavor.name }

  // When no product flavors defined, use empty
  if (!productFlavors) productFlavors.add('')

  productFlavors.each { productFlavorName ->
    buildTypes.each { buildTypeName ->
      def sourceName, sourcePath
      if (!productFlavorName) {
        sourceName = sourcePath = "${buildTypeName}"
      } else {
        sourceName = "${productFlavorName}${buildTypeName.capitalize()}"
        sourcePath = "${productFlavorName}/${buildTypeName}"
      }
      def testTaskName = "test${sourceName.capitalize()}UnitTest"
      def coverageTaskName = "${testTaskName}Coverage"

      if (project.tasks.findByName(testTaskName) == null) {
        // If the task dont exists bc was disabled dont create the tasks
        return
      }

      // Create coverage task of form 'testFlavorTypeCoverage' depending on 'testFlavorTypeUnitTest'
      task "${coverageTaskName}"(type: JacocoReport, dependsOn: testTaskName) {
        group = 'Reporting'
        description = "Generate Jacoco coverage reports for the ${sourceName.capitalize()} build."

        classDirectories = fileTree(dir: "${project.buildDir}/intermediates/classes/${sourcePath}",
            excludes: ['**/R.class',
                       '**/R$*.class',
                       '**/*$ViewInjector*.*',
                       '**/*$ViewBinder*.*',
                       '**/BuildConfig.*',
                       '**/Manifest*.*',
                       '**/*$Lambda$*.*', // Jacoco can not handle several "$" in class name.
                       '**/*Module.*', // Modules for Dagger.
                       '**/*Dagger*.*', // Dagger auto-generated code.
                       '**/*MembersInjector*.*', // Dagger auto-generated code.
                       '**/*_Provide*Factory*.*'] // Dagger auto-generated code.
        )

        def coverageSourceDirs = ['src/main/java',
                                  "src/$productFlavorName/java",
                                  "src/$buildTypeName/java"]
        additionalSourceDirs = files(coverageSourceDirs)
        sourceDirectories = files(coverageSourceDirs)
        executionData = files("${project.buildDir}/jacoco/${testTaskName}.exec")

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