Writing Your Second Kotlin Compiler Plugin - Part 1

TemplateGradlePlugin.kt

class TemplateGradlePlugin : KotlinCompilerPluginSupportPlugin {
  override fun apply(target: Project): Unit = with(target) {
    extensions.create("template", TemplateGradleExtension::class.java)
  }

  override fun isApplicable(kotlinCompilation: KotlinCompilation<*>): Boolean = true

  override fun getCompilerPluginId(): String = BuildConfig.KOTLIN_PLUGIN_ID

  override fun getPluginArtifact(): SubpluginArtifact = SubpluginArtifact(
    groupId = BuildConfig.KOTLIN_PLUGIN_GROUP,
    artifactId = BuildConfig.KOTLIN_PLUGIN_NAME,
    version = BuildConfig.KOTLIN_PLUGIN_VERSION
  )

  override fun getPluginArtifactForNative(): SubpluginArtifact = SubpluginArtifact(
    groupId = BuildConfig.KOTLIN_PLUGIN_GROUP,
    artifactId = BuildConfig.KOTLIN_PLUGIN_NAME + "-native",
    version = BuildConfig.KOTLIN_PLUGIN_VERSION
  )

  override fun applyToCompilation(
    kotlinCompilation: KotlinCompilation<*>
  ): Provider<List<SubpluginOption>> {
    val project = kotlinCompilation.target.project
    val extension = project.extensions.getByType(TemplateGradleExtension::class.java)
    return project.provider {
      listOf(
        SubpluginOption(key = "string", value = extension.stringProperty.get()),
        SubpluginOption(key = "file", value = extension.fileProperty.get().asFile.path),
      )
    }
  }
}