How to add `android` Kotlin DSL to classpath in buildSrc module?

Question

I want to make some extension methods in buildSrc to use them in other modules' build.gradle.kts -files

Particularly I need to extend com.android.build.gradle.LibraryExtension . For that, I seem to need com.android.library in buildSrc 's classpath. Trying to achieve that with

plugins {
   id("com.android.library") apply false
}

gives me Plugin [id: 'com.android.library', apply: false] was not found in any of the following sources: error.

What is the correct setup for this purpose?

Full content of build.gradle.kts from buildSrc below:

buildscript {
   repositories {
      mavenCentral()
      google()
      jcenter()
   }

   dependencies {
      classpath("com.android.tools.build:gradle:3.6.3")
   }
}

plugins {
   `kotlin-dsl`
   id("com.android.library") apply false
}

Answer 1

Just ignore everything I previously posted. Here is how I was able to use LibraryExtension . However, ymmv, this seems heavy handed.

repositories {
    jcenter()
    google()
}

// ...snip...

dependencies {
    implementation("com.android.tools.build:gradle:3.6.3")
}

If all you want is access to the class, you want it as a dependency, not a plugin. I'm still not sure how to make this work as a plugin in buildSrc, so hopefully this gets you what you need.