println "Task '\$name' file '\${file.name}' with '\${file.text}'"
                    }
                }
            }

            task a(type: TaskA) {
                outputFile = file("output.txt")
            }

            task b(type: TaskB) {
                inputFiles = tasks.a.outputs.files
            }

tasks.register("task1"){
    println("REGISTER TASK1: This is executed during the configuration phase")
}

tasks.register("task2"){
    println("REGISTER TASK2: This is executed during the configuration phase")
}

tasks.named("task1"){
    println("NAMED TASK1: This is executed during the configuration phase")
    doFirst {

writing-tasks-7.png...

    def "can configure tasks from command line in multiple projects"() {
        given:
        createDirs("project2")
        settingsFile << "include 'project2'"
        buildFile << """
            allprojects {
                task someTask(type: SomeTask)
            }
            task task1 //extra stress
            task task2

            ${taskWithMultipleOptions()}
        """

writing-tasks-1.png...

writing-tasks-3.png...

writing-tasks-6.png...

Method <org.gradle.api.tasks.GradleBuild.getBuildName()> does not have raw return type assignable to org.gradle.api.provider.Property in (GradleBuild.java:0)
Method <org.gradle.api.tasks.GradleBuild.getDir()> does not have raw return type assignable to org.gradle.api.provider.Property in (GradleBuild.java:0)

                        project.getTasks().register("b", TaskB.class, task -> task.doLast(b -> actionB.execute((TaskB) b)));
                    }
                }
            """
        }
        buildFile << """
            apply plugin: my.LambdaPlugin
        """

        when:
        configurationCacheRun("a", "b")
        configurationCacheRun("a", "b")

<2> You can use the link:{kotlinDslPath}/gradle/org.gradle.api.tasks/-task-collection/index.html[named()] method to configure existing tasks.
=====
[.multi-language-sample]
=====
.app/build.gradle
[source, groovy]
----
tasks.register("task1") {  // <1>
    println("REGISTER TASK1: This is executed during the configuration phase")