CustomPlugin.kt

CustomPlugin.kt

import com.android.build.api.variant.ApplicationAndroidComponentsExtension
import org.gradle.api.Plugin
import org.gradle.api.Project

class CustomPlugin: Plugin<Project> {
    override fun apply(project: Project) {
        project.tasks.register("hello"){ task->
            task.doLast {
                println("Hello " + project.parent?.name)
            }
        }
        
        val extension = project.extensions.getByName("androidComponents") as ApplicationAndroidComponentsExtension
        extension.beforeVariants { variantBuilder ->
            if (variantBuilder.name == "staging") {
                variantBuilder.enableUnitTest = false
                variantBuilder.minSdk = 23
            }
        }
        extension.finalizeDsl { ext->
            ext.buildTypes.create("staging").let { buildType ->
                buildType.initWith(ext.buildTypes.getByName("debug"))
                buildType.manifestPlaceholders["hostName"] = "internal.example.com"
                buildType.applicationIdSuffix = ".debugStaging"
                //added later while explaining beforeVariants
                buildType.isDebuggable = true 
            }
        }
    }
}