posts: update buildSrc post with next heading

content/posts/configuring-your-android-builds-with-buildsrc.md

@@ -8,7 +8,7 @@ tags = ["buildSrc", "gradle plugin"]
 title = "Configuring your Android builds with buildSrc"
 +++
 
-With the introduction of the Gradle Kotlin DSL a while ago and the more recent improvements to massively improve its compile times, it is a good time to consider using buildSrc for configuring your builds.
+With the introduction of the Gradle Kotlin DSL a while ago and the more recent [performance improvements] to massively improve its compile times, it is a good time to consider using buildSrc for configuring your builds.
 
 The simplest way to do this is through a [precompiled script plugin], where you create a Gradle plugin to your `buildSrc` directory itself as opposed to including it from a remote repository.
 
@@ -56,4 +56,31 @@ To confirm it's working, add a print statement to the body of `apply` and run `.
 
 And that's about all you need to do for getting a Gradle plugin going. Let's see how to make this plugin do some more interesting things.
 
+## Configuring the project based on other applied plugins
+
+In our example, we also have the `com.android.application` plugin applied. We can use that information in our custom plugin to configure our project. First, let's set up the necessary bits that let us discover the application plugin in our project.
+
+```diff
+package com.example
+
++import com.android.build.gradle.internal.plugins.AppPlugin
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+
+class ExamplePlugin : Plugin<Project> {
+  override fun apply(target: Project) {
++    target.plugins.all {
++      when(this) {
++        AppPlugin -> {
++          TODO("We will be doing things here when the app plugin is applied")
++        }
++      }
++    }
+  }
+}
+```
+
+To see if this is working, try running `./gradlew tasks` again. It should cause the build to fail when configuring the app project because of the `TODO()` method.
+
 [precompiled script plugin]: https://docs.gradle.org/current/userguide/custom_plugins.html#sec:precompiled_plugins
+[performance improvements]: https://docs.gradle.org/current/release-notes.html#performance-improvements