A *build script* configures a *project* and is associated with an object of type link:{javadocPath}/org/gradle/api/Project.html[`Project`].

image::author-gradle-4.png[Build,500,63,align="left"]

As the build script executes, it configures `Project`.

The build script is either a `\*.gradle` file in Groovy or a `*.gradle.kts` file in Kotlin.

IMPORTANT: _Build scripts_ configure `Project` objects and their children.

/**
 * Configures the repositories for this project.
 *
 * Executes the given configuration block against the [RepositoryHandler] for this
 * project.
 *
 * @param configuration the configuration block.
 */
fun Project.repositories(configuration: RepositoryHandler.() -> Unit) =
    repositories.configuration()


/**
 * Configures the repositories for the script dependencies.
 */

        println("Input parameter: $inputParameter")
    }
}

// Plugin class that configures the extension and task
class MyPlugin implements Plugin<Project> {
    void apply(Project project) {
        // Create and configure the extension
        def extension = project.extensions.create("myExtension", MyExtension)
        // Create and configure the custom task
        project.tasks.register("myTask", MyCustomTask) {

upgradeNotes:
  - title: Default tracing to `zipkin.istio-system.svc` removed
    content: |
      In previous versions of Istio, tracing was automatically configured to send traces to `zipkin.istio-system.svc`.
      This default setting has been removed; users will need to explicitly configure where to send traces moving forward.

      `istioctl x precheck --from-version=1.21` can automatically detect if you may be impacted by this change.

    /**
     * Adds and configures a Maven repository.
     *
     * @param action The action to use to configure the repository.
     * @return The added repository.
     */
    MavenArtifactRepository maven(Action<? super MavenArtifactRepository> action);

    /**
     * Adds and configures an Ivy repository. Newly created instance of {@code IvyArtifactRepository} is passed as an argument to the closure.

        def downloadDArtifact = events.operation("Download ${projectD.artifact.uri}")

        resolveCompileDependencies.parent == applyRootBuildScript
        def configureA = events.operation("Configure project :a")
        configureA.parent == resolveCompileDependencies
        resolveB.parent == resolveCompileDependencies
        downloadCRootMetadata.parent == resolveCompileDependencies

        configuredToolchain.javaVersion.toString().contains(someJdk.javaVersion.getMajorVersion())
    }

    def "source and target compatibility are configured if toolchain is configured"() {
        given:
        setupProjectWithToolchain(Jvm.current().javaVersion)

        when:
        project.sourceSets.create('custom')

        then:

/**
 * Allows a [NamedDomainObjectProvider] to be configured via invocation syntax.
 *
 * ```kotlin
 * val rebuild by tasks.registering
 * rebuild { // rebuild.configure {
 *   dependsOn("clean")
 * }
 * ```
 */
operator fun <T> NamedDomainObjectProvider<T>.invoke(action: T.() -> Unit) =

# Project-wide Gradle settings.
# IDE (e.g. Android Studio) users:
# Gradle settings configured through the IDE *will override*
# any settings specified in this file.
# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html
# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
org.gradle.jvmargs=-Xmx1536m

 *
 * @param <P> the parameters defined by the configured {@link FlowAction dataflow action} type.
 * @since 8.1
 */
@Incubating
public interface FlowActionSpec<P extends FlowParameters> {

    /**
     * Returns the parameters defined by the configured {@link FlowAction dataflow action}.
     *
     * @return mutable parameters object, never null.
     * @since 8.1