Converting Groovy tasks build.gradle to kotlin kts file - kotlin

Question

I am trying to convert my build.gradle file in Groovy to a kotlin .kts file, I have some tasks in the gradle file that I dont know how to convert correctly
task androidJavadocs(type: Javadoc) {
failOnError = false
source = android.sourceSets.main.java.srcDirs
ext.androidJar = "${android.sdkDirectory}/platforms/${android.compileSdkVersion}/android.jar"
classpath += files(ext.androidJar)
exclude '**/R.html', '**/R.*.html', '**/index.html'
}
task androidJavadocsJar(type: Jar, dependsOn: androidJavadocs) {
classifier = 'javadoc'
from androidJavadocs.destinationDir
}
I dont quite understand how to use the "type", I was going down this path
val androidJavadocs by tasks.withType<Javadoc>(){
}
but its giving me the error
Type 'DomainObjectCollection<Javadoc!>' has no method
'getValue(Build_gradle, KProperty<*>)' and thus it cannot serve as a
delegate
How do I convert those groovy tasks to kotlin tasks correctly?

Answer 1

You can use the named() method to configure existing tasks and the register() method to create new ones.
tasks {
register<Javadoc>("androidJavadocs") {
// Task's body here
}
}
// or
tasks.register<Javadoc>("androidJavadocs") {
// Task's body here
}
If you want to use Kotlin delegated properties
val androidJavadocs by tasks.registering(Javadoc::class) {
// Task's body here
}
The full answer to your question
val androidJavadocs by tasks.registering(Javadoc::class) {
isFailOnError = false
source = android.sourceSets.main.java.srcDirs
ext["androidJar"] = "${android.sdkDirectory}/platforms/${android.compileSdkVersion}/android.jar")
classpath += files(ext["androidJar"])
exclude("**/R.html", "**/R.*.html", "**/index.html")
}
val androidJavadocsJar by tasks.registering(Jar::class) {
classifier = "javadoc"
dependsOn(androidJavadocs)
from(androidJavadocs.get().destinationDir)
}