checkstyle {
    buildLibs?.let {
        toolVersion = buildLibs.findVersion("checkstyle").get().requiredVersion
    }
    config = configFile("checkstyle.xml")
    val projectDirectory = layout.projectDirectory
    configDirectory = rules.elements.map {
        projectDirectory.dir(it.single().asFile.absolutePath).dir("checkstyle")
    }
}

}
fun version(alias: String) = libs.findVersion(alias).get().toString()

tasks.withType<Checkstyle>().configureEach {
  exclude("**/CipherSuite.java")
}

val checkstyleConfig = configurations.maybeCreate("checkstyleConfig")
dependencies {
  add("checkstyleConfig", library("checkstyle")) {
    isTransitive = false
  }
}

configure<CheckstyleExtension> {

        DEPENDENCY_GRAPH_EXCLUDE_PROJECTS: ':docs|:internal-performance-testing|:enterprise-plugin-performance|:performance|:internal-integ-testing'

        CheckstyleExtension checkstyle = project.getExtensions().getByType(CheckstyleExtension.class);
        tasks.register("checkstyleApi", Checkstyle.class, task -> {
            task.source(extension.getDocumentedSource());
            // TODO: This is ugly
            task.setConfig(project.getResources().getText().fromFile(checkstyle.getConfigDirectory().file("checkstyle-api.xml")));

plugin, so following best practices is relatively straightforward.  For core plugins in gradle/gradle, it's easy for an object to be created without applying its associated plugin. For instance, Spring has a plugin that uses the Checkstyle task directly without applying the Checkstyle plugin.

Until we can provide the same guarantees for core plugins, we need to be more conservative for existing classes and not follow best practices. This means conventions need to be set in both a plugin and the...

bouncycastle-bctls = { module = "org.bouncycastle:bctls-jdk15to18", version.ref = "org-bouncycastle" }
brotli-dec = { module = "org.brotli:dec", version.ref = "brotli-dec" }
checkstyle = { module = "com.puppycrawl.tools:checkstyle", version.ref = "checkstyle" }
clikt = { module = "com.github.ajalt.clikt:clikt", version.ref = "clikt" }
codehaus-signature-java18 = { module = "org.codehaus.mojo.signature:java18", version.ref = "codehaus-signature-java18" }

    verifyComplexMessage(expected);
  }

  public void testCheckState_simple_success() {
    checkState(true);
  }

  public void testCheckState_simple_failure() {
    assertThrows(IllegalStateException.class, () -> checkState(false));
  }

  public void testCheckState_simpleMessage_success() {
    checkState(true, IGNORE_ME);
  }

  public void testCheckState_simpleMessage_failure() {

    verifyComplexMessage(expected);
  }

  public void testCheckState_simple_success() {
    checkState(true);
  }

  public void testCheckState_simple_failure() {
    assertThrows(IllegalStateException.class, () -> checkState(false));
  }

  public void testCheckState_simpleMessage_success() {
    checkState(true, IGNORE_ME);
  }

  public void testCheckState_simpleMessage_failure() {

  @CanIgnoreReturnValue
  public CacheBuilder<K, V> maximumSize(long maximumSize) {
    checkState(
        this.maximumSize == UNSET_INT, "maximum size was already set to %s", this.maximumSize);
    checkState(
        this.maximumWeight == UNSET_INT,
        "maximum weight was already set to %s",
        this.maximumWeight);
    checkState(this.weigher == null, "maximum size can not be combined with weigher");

  @CanIgnoreReturnValue
  public CacheBuilder<K, V> maximumSize(long maximumSize) {
    checkState(
        this.maximumSize == UNSET_INT, "maximum size was already set to %s", this.maximumSize);
    checkState(
        this.maximumWeight == UNSET_INT,
        "maximum weight was already set to %s",
        this.maximumWeight);
    checkState(this.weigher == null, "maximum size can not be combined with weigher");