}
    }

    def "emits deprecation warnings as build operation progress events for buildSrc builds"() {
        when:
        file('buildSrc/build.gradle') << """
            org.gradle.internal.deprecation.DeprecationLogger.deprecate('BuildSrc script').willBeRemovedInGradle9().undocumented().nagUser();
        """

        and:
        executer.noDeprecationChecks()

First, create a custom task that generates MD5 hashes of a configurable set of files.

In a new directory, create a `buildSrc/build.gradle(.kts)` file:

====
include::sample[dir="snippets/workerApi/md5CustomTask/kotlin",files="buildSrc/build.gradle.kts[]"]
include::sample[dir="snippets/workerApi/md5CustomTask/groovy",files="buildSrc/build.gradle[]"]
====

        fixture.assertStateUpdated {
            fileChanged("a/build.gradle")
            fileChanged("b/build.gradle")
            projectConfigured(":buildSrc")
            projectConfigured(":")
            modelsCreated(":a", ":b")
            modelsReused(":", ":buildSrc")
        }

        when:
        executer.withArguments(ENABLE_CLI)
        def model4 = runBuildAction(new FetchCustomModelForEachProjectInParallel())

        notifications.started(EvaluateSettingsBuildOperationType.Details, [settingsDir: file('a').absolutePath, settingsFile: file('a/settings.gradle').absolutePath, buildPath: ":a"])
        notifications.started(EvaluateSettingsBuildOperationType.Details, [settingsDir: file('a/buildSrc').absolutePath, settingsFile: file('a/buildSrc/settings.gradle').absolutePath, buildPath: ":a:buildSrc"])

    @Requires(value = IntegTestPreconditions.NotEmbeddedExecutor, reason = "classloader isolation does not work here in embedded mode")
    @InspectsExecutedTasks
    def "buildSrc classes are not visible to injected classes"() {
        plugin.build()
        def buildSrcSrcDir = file("buildSrc/src/main/groovy/org/gradle/test")

        // these class names intentionally clash with what we are injecting

        given:
        def pluginBuilder = new PluginBuilder(file("plugin"))
        pluginBuilder.addSettingsPlugin """
            settings.gradle.allprojects {
                println "Hello from root build's plugin"
            }
        """, "org.gradle.test.MyPlugin", "MyPlugin"

        pluginBuilder.prepareToExecute()

        settingsFile << """
            includeBuild("plugin")
        """

* The build's output;
* The build's logging (i.e. console output);
* The set of tasks executed by the build and their results (e.g. FAILED, UP-TO-DATE etc.).

        when:
        run 'otherBuild'

        then:
        result.assertTaskExecuted(":other:buildSrc:jar")
    }

    def "buildSrc can have nested build"() {
        given:
        file('buildSrc/src/main/java/Thing.java') << "class Thing { }"
        file('buildSrc/build.gradle') << """
            task otherBuild(type:GradleBuild) {
                dir = '../other'
                tasks = ['build']

                group = 'org.acme'
            """
            dir("buildSrc") {
                file("settings.gradle") << "rootProject.name = 'nested-buildsrc-changed'"
                file('build.gradle') << ""
                dir("buildSrc") {
                    file("settings.gradle") << "rootProject.name = 'nested-buildsrc-buildsrc-changed'"
                    file('build.gradle') << ""
                }

        file("buildSrc/src/main/groovy/plugins/foo.bar.gradle") << "println 'foo.bar applied'"
        file("buildSrc/src/main/groovy/plugins/baz.bar.gradle") << "println 'baz.bar applied'"

        buildFile << """
            plugins {
                id 'foo.bar'
            }
        """
        succeeds("help")

        when:
        file("buildSrc/src/main/groovy/plugins/baz.bar.gradle").delete()