Creating plugin (located in buildSrc/src/main/kotlin/com/example)

README.md

Watching this talk and I'm trying to mimic AndroidXPlugin. However I can't import all of the classes I need. Why is Android Studio saying android is unresolved reference?

I can reference com.android.build.gradle.* package in app/build.gradle:

import com.android.build.gradle.LibraryExtension // :eyes: this works just fine

class MyPlugin implements Plugin<Project> {
    @Override
    void apply(Project target) {
        project.plugins.all {
            LibraryExtension // blah blah
        }
    }
}

but not in buildSrc/build.gradle nor buildSrc/src/main/kotlin/com/example (see attached MyPlugin.kt)

MyPlugin.kt

package com.example

import org.gradle.api.Plugin
import org.gradle.api.Project
// :eyes: why is A/S saying 'android' is unresolved reference??
import com.android.build.gradle.AppPlugin
import com.android.build.gradle.LibraryExtension
import com.android.build.gradle.LibraryPlugin

class MyPlugin : Plugin<Project> {
    override fun apply(project: Project) {
        project.plugins.all {
            when (it) {
                is LibraryPlugin -> {
                    val extension = project.extensions.getByType(LibraryExtension::class.java)
                    extension.configureLibrary()
                }
                is AppPlugin -> {
                    // ...
                }
            }
        }
    }

    private fun LibraryExtension.configureLibrary() {
        // start off by extracting just common lint settings
        lintOptions {
          ...
        }
    }
}