)
        ),
        Stage(
            StageName.EXPERIMENTAL_VFS_RETENTION,
            trigger = Trigger.never,
            runsIndependent = true,
            flameGraphs = listOf(
                FlameGraphGeneration(
                    14, "File System Watching",

    "EqualsGetClass", // Let's agree if we want to adopt Error Prone's idea of valid equals()
    "JdkObsolete", // Most of the checks are good, but we do not want to replace all LinkedLists without a good reason

    // NEVER
    "MissingSummary", // We have another mechanism to check Javadocs on public API
    "InjectOnConstructorOfAbstractClass", // We use abstract injection as a pattern

import org.gradle.api.tasks.UntrackedTask
import java.util.Properties
import javax.xml.parsers.DocumentBuilderFactory


/**
 * Fetch the latest Kotlin versions and write a properties file.
 * Never up-to-date, non-cacheable.
 */
@UntrackedTask(because = "Not worth tracking")
abstract class UpdateKotlinVersions : DefaultTask() {

    @get:Internal
    abstract val comment: Property<String>

    @get:Internal

import org.jsoup.Jsoup
import org.w3c.dom.Element
import java.util.Properties
import javax.xml.parsers.DocumentBuilderFactory


/**
 * Fetch the latest AGP versions and write a properties file.
 * Never up-to-date, non-cacheable.
 */
@UntrackedTask(because = "Not worth tracking")
abstract class UpdateAgpVersions : DefaultTask() {

    @get:Internal
    abstract val comment: Property<String>

    @get:Internal

            quietPeriod = 90
            triggerRules = triggerExcludes
            branchFilter = model.branch.branchFilter()
            enabled = enableTriggers
        }
    } else if (stage.trigger != Trigger.never) {
        triggers.schedule {
            if (stage.trigger == Trigger.weekly) {
                schedulingPolicy = weekly {
                    dayOfWeek = ScheduleTrigger.DAY.Saturday
                    hour = 1

    }

    /*
     To avoid unnecessary rerun, what we do here is a bit complicated:

     1. Build a Gradle distribution with a fixed timestamp and hash it, but never use this distribution.
     2. Build a Gradle distribution with this hash as a version + fixed timestamp -> dogfood-first

private
val dirVersionPattern = "\\d+\\.\\d+(\\.\\d+)?(-\\w+)*(-\\d{14}[+-]\\d{4})?".toRegex()


val logger = Logging.getLogger("gradlebuild.cleanup")


/**
 * Removes state for versions that we're unlikely to ever need again, such as old snapshot versions.
 */
fun FileSystemOperations.removeOldVersionsFromDir(dir: Directory, shouldDelete: Spec<GradleVersion>, dirPrefix: String = "", dirSuffix: String = "") {
    if (dir.asFile.isDirectory) {

            (candidateVersion.isSnapshot && candidateVersion < gradleVersion)
                || candidateVersion.version.endsWith("-snapshot-1")
        }

        // Remove state for old versions of Gradle that we're unlikely to ever require again
        fileSystemOperations.removeOldVersionsFromDir(workerDir.dir("caches"), expireDistributionCache)

        // Remove scripts caches

* A text editor or IDE. We use and recommend [IntelliJ IDEA CE](http://www.jetbrains.com/idea/).  IntelliJ Ultimate will also work. You'll need IntelliJ 2021.2.2 or newer.
* [git](https://git-scm.com/) and a [GitHub account](https://github.com/join).