Custom task with gradle kotlin buildSrc

README.md

• https://trickyandroid.com/gradle-tip-3-tasks-ordering/

• https://docs.gradle.org/current/userguide/organizing_gradle_projects.html#sec:build_sources

build.gradle

// app/build.gradle
task updatewhatsnew << {
    GooglePlay.updateWhatsNew(project.projectDir, niceVersion)
}

tasks.whenTaskAdded { task ->
    if (task.name == "publishListingProductionRelease") {
        task.dependsOn updatewhatsnew
    }
}

build.gradle.kts

// buildSrc/build.gradle.ktsbuildSrc/build.gradle.kts
plugins {
    `kotlin-dsl`
}
repositories {
    jcenter()
}
dependencies {
    //...
}

GooglePlay.kt

// buildSrc/src/main/java/GooglePlay.kt
import java.io.File

object GooglePlay {


    @JvmStatic
    fun updateWhatsNew(projectDir: File, version: String) {
        val files: List<File> = listOf(
                "src/production/play/en-US/listing/whatsnew-alpha",
                "src/production/play/en-US/whatsnew",
                "src/production/play/en-US/whatsnew-alpha"
        ).map { projectDir.resolve(it) }
        val fileContent = "KartaunBele $version"
        for (file in files) {
            check(file.canWrite()) { "Cannot write on ${file.absolutePath}" }
            println("Updating ${file.absolutePath} with content [$fileContent]")
            file.writeText("KartaunBele $version")
        }

    }
}