properties.gradle.kts

/*
 * This file was generated by the Gradle 'init' task.
 *
 * This generated file contains a sample Java Library project to get you started.
 * For more details take a look at the Java Libraries chapter in the Gradle
 * User Manual available at https://docs.gradle.org/6.0.1/userguide/java_library_plugin.html
 */
import java.util.*

open class PropertiesWriter : DefaultTask() {
    @get:Input
    val key = project.objects.property<String>().convention("someProperty")

    @get:Input
    val value = project.objects.property<String>().convention("someValue")

    @get:OutputFile
    val outputFile: Provider<RegularFile> = project.layout.buildDirectory.file("out.properties")

    @TaskAction
    fun writeFile() {
        outputFile.get().asFile.writeText("${key.get()}=${value.get()}")
    }
}

open class PropertiesReader : DefaultTask() {
    @get:InputFile
    val inputFile: Property<RegularFile> = project.objects.fileProperty()

    @get:Input
    val property: Property<String> = project.objects.property<String>().convention("someProperty")

    @TaskAction
    fun printProperty() {
        Properties().run {
            load(inputFile.get().asFile.inputStream())
            println(get(property.get()))
        }
    }
}

val writeProperties by tasks.registering(PropertiesWriter::class)
val readProperties by tasks.registering(PropertiesReader::class) {
    inputFile.set(writeProperties.map { writeProperties.get().outputFile.get() })
}