// build.gradle.kts

buildscript {
    repositories {
        mavenCentral()
        jcenter()
    }
}

plugins {
    jacoco
    id("com.github.nbaztec.coveralls-jacoco") version "1.2.14"
}

// build.gradle.kts

coverallsJacoco {
    reportPath = "" // default: "build/reports/jacoco/test/jacocoTestReport.xml"

    reportSourceSets += sourceSets.foo.allJava.srcDirs + sourceSets.bar.allJava.srcDirs // default: main
    apiEndpoint = "" // default: https://coveralls.io/api/v1/jobs 
    
    dryRun = false // default: false
    coverallsRequest = File("build/req.json") // default: null
}

tasks.register<JacocoReport>("codeCoverageReport") {
    val jacocoReportTask = this

    // If a subproject applies the 'jacoco' plugin, add the result it to the report
    subprojects {
        val subproject = this
        subproject.plugins.withType<JacocoPlugin>().configureEach {
            subproject.tasks.matching({ it.extensions.findByType<JacocoTaskExtension>() != null }).configureEach {
                val testTask = this
                sourceSets(subproject.sourceSets.main.get())
                executionData(testTask)
            }

            // To automatically run `test` every time `./gradlew codeCoverageReport` is called,
            // you may want to set up a task dependency between them as shown below.
            // Note that this requires the `test` tasks to be resolved eagerly (see `forEach`) which
            // may have a negative effect on the configuration time of your build.
            subproject.tasks.matching({ it.extensions.findByType<JacocoTaskExtension>() != null }).forEach {
                rootProject.tasks["codeCoverageReport"].dependsOn(it)
            }
        }
    }


    // enable the different report types (html, xml, csv)
    reports {
        // xml is usually used to integrate code coverage with
        // other tools like SonarQube, Coveralls or Codecov
        xml.isEnabled = true

        // HTML reports can be used to see code coverage
        // without any external tools
        html.isEnabled = true
    }

    coverallsJacoco.dependsOn(jacocoReportTask)
}

// ignore any subproject, if required `subprojects.findAll{ it.name != 'customSubProject' }`
val coveredProjects = subprojects

// configure() method takes a list as an argument and applies the configuration to the projects in this list.
configure(coveredProjects) {
    val p = (this as org.gradle.api.internal.project.DefaultProject)
    p.evaluate()

    // Here we apply jacoco plugin to every project
    apply(jacoco)

    // Set Jacoco version
    jacoco {
        toolVersion = "0.8.5"
    }

    // Here we create the task to generate Jacoco report
    // It depends to unit test task we don't have to manually running unit test before the task
    p.task("jacocoReport", JacocoReport::class) {

        // Define what type of report we should generate
        // If we don't want to process the data further, html should be enough
        reports {
            xml.isEnabled = true
            html.isEnabled = true
        }

        // Setup the .class, source, and execution directories
        val fileTreeConfig: (ConfigurableFileTree) -> Unit = {
            it.exclude("**/R.class", "**/R$*.class", "**/BuildConfig.*", "**/Manifest*.*", "android/**/*.*")
        }

        sourceDirectories.setFrom(files("${p.projectDir}/src/main/java"))
        classDirectories.setFrom(listOf(
            fileTree("${p.buildDir}/classes", fileTreeConfig),
            fileTree("${p.buildDir}/intermediates/javac/debug", fileTreeConfig),
            fileTree("${p.buildDir}/tmp/kotlin-classes/debug", fileTreeConfig)
        ))
        executionData.setFrom(fileTree(p.buildDir) {
            include("jacoco/*.exec", "outputs/code-coverage/connected/*coverage.ec")
        })
    }.dependsOn("test")
}

plugins {
    jacoco
    id("com.github.nbaztec.coveralls-jacoco") version "1.2.4"
}

tasks {
    register("jacocoFullReport", JacocoReport::class) {
        val jacocoReportTask = this

        group = "Coverage reports"
        val projects = coveredProjects

        // Here we depend on the jacocoReport task that we created before
        val subTasks = projects.map { it.task<JacocoReport>("jacocoReport") }
        dependsOn(subTasks)

        val subSourceDirs = subTasks.map { files(it.sourceDirectories) }
        additionalSourceDirs.setFrom(subSourceDirs)
        sourceDirectories.setFrom(subSourceDirs)

        classDirectories.setFrom(subTasks.map { files(it.classDirectories) })
        executionData.setFrom(subTasks.map { files(it.executionData) })

        reports {
            html.isEnabled = true
            html.destination = file("$buildDir/reports/jacoco/html")

            xml.isEnabled = true
            xml.destination = file("$buildDir/reports/jacoco/jacocoFullReport.xml")
        }

        doFirst {
            executionData.setFrom(files(executionData.filter { it.exists() }))
        }

        coverallsJacoco {
            dependsOn(jacocoReportTask)

            reportPath = "$buildDir/reports/jacoco/jacocoFullReport.xml"
            reportSourceSets = subSourceDirs.flatMap { it.files }
        }
    }
}