}

    @Nullable
    private String systemProperty(String propName) {
        return providerFactory.systemProperty(propName).forUseAtConfigurationTime().getOrNull();
    }

    )
  }
}

// Applying this stuff, particularly the idea-ext plugin, has a cost so avoid it unless we're running in the IDE
if (providers.systemProperty('idea.active').forUseAtConfigurationTime().getOrNull() == 'true') {
  project.apply(plugin: org.jetbrains.gradle.ext.IdeaExtPlugin)

  tasks.register('configureIdeaGradleJvm') {
    group = 'ide'
    description = 'Configures the appropriate JVM for Gradle'

internal const val HEADER_LIMIT = 256 * 1024L

internal fun Headers.commonName(index: Int): String = namesAndValues.getOrNull(index * 2) ?: throw IndexOutOfBoundsException("name[$index]")

internal fun Headers.commonValue(index: Int): String =
  namesAndValues.getOrNull(index * 2 + 1) ?: throw IndexOutOfBoundsException("value[$index]")

internal fun Headers.commonValues(name: String): List<String> {

    val projectDir = layout.projectDirectory.asFile

    val gradleProperties = Properties()
    properties.get().forEach { (k, v) ->
      if (v is Provider<*>) {
        val value = v.getOrNull()
        if (value != null) gradleProperties[k] = value
      } else {
        gradleProperties[k] = v
      }
    }

    // Set default values if not present

  // Note that module checking only works on JDK 9+,
  // because the JDK built-in base modules are not available in earlier versions.
  val javaVersion = compileKotlinTask.kotlinJavaToolchain.javaVersion.getOrNull()
  when {
    javaVersion?.isJava9Compatible == true -> {
      logger.info("Module-info checking is enabled; $compileKotlinTask is compiled using Java $javaVersion")