languageVersion.set(JavaLanguageVersion.of(17))
      }
    }
  }

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

  val checkstyleConfig: Configuration by configurations.creating
  dependencies {
    checkstyleConfig(rootProject.libs.checkStyle) {
      isTransitive = false
    }
  }

  val androidSignature by configurations.creating

  // OkHttp requires Java 8+.
  jvmSignature(rootProject.libs.codehaus.signature.java18) { artifact { type = "signature" } }

  checkstyleConfig(rootProject.libs.checkStyle) {
    isTransitive = false
  }
}

// Animal Sniffer confirms we generally don't use APIs not on Java 8.
configure<AnimalSnifferExtension> {
  annotation = "okhttp3.internal.SuppressSignatureCheck"