fun Directory.parentOrRoot(): Directory = if (this.file("version.txt").asFile.exists()) {
    this
} else {
    val parent = dir("..")
    when {
        parent.file("version.txt").asFile.exists() -> parent
        this == parent -> throw IllegalStateException("Cannot find 'version.txt' file in root of repository")
        else -> parent.parentOrRoot()

@DisableCachingByDefault(because = "Not worth caching")
abstract class CheckSubprojectsInfo : SubprojectsInfo() {

    @TaskAction
    fun checkSubprojectsInfo() {
        if (subprojectsJson.asFile.readText() != generateSubprojectsJson()) {
            throw GradleException(
                "New project(s) added without updating subproject JSON. Please run `:${GenerateSubprojectsInfo.TASK_NAME}` task."
            )

        moduleIdentity.baseName.map { "generated-resources/$it-parameter-names/$it-parameter-names.properties" }
    )
}

main.output.dir(
    parameterNamesIndex.map { it.destinationFile.get().asFile.parentFile }

        }
    }

    private
    fun buildErrorMessage(formattedMismatches: String): String {
        return "API changes in file '${apiChangesFile.get().asFile.name}' should be in alphabetical order (by type and member), yet these changes were not:\n" +
            "$formattedMismatches\n" +
            "\n" +

    @get:PathSensitive(PathSensitivity.NONE)
    abstract val apiChangesFile: RegularFileProperty

    protected
    fun loadChanges(): List<AcceptedApiChange> {
        val jsonString = apiChangesFile.get().asFile.readText()
        val json = Gson().fromJson(jsonString, AcceptedApiChanges::class.java)
        return json.acceptedApiChanges!!
    }

    /**
     * Sorts the given list of [AcceptedApiChange]s by type and member.

    @TaskAction
    fun execute() {
        val sortedChanges = sortChanges(loadChanges())
        val json = formatChanges(sortedChanges)
        apiChangesFile.asFile.get().bufferedWriter().use { out -> out.write(json) }
    }

    private
    fun formatChanges(changes: List<AbstractAcceptedApiChangesMaintenanceTask.AcceptedApiChange>): String {

    init {
        val lowestInterestingVersion = GradleVersion.version("0.8")
        val lowestTestedVersion = GradleVersion.version("1.0")

        val releasedVersions = releasedVersionsFile.asFile.reader().use {
            Gson().fromJson(it, ReleasedVersions::class.java)
        }

        val latestFinalRelease = releasedVersions.finalReleases.first()

        return gson.toJson(subprojects) + '\n'
    }

    private
    fun generateSubprojectsDirectories(): List<File> {
        val subprojectRoots = platformsFolder.asFile.listFiles(File::isDirectory).plus(subprojectsFolder.asFile).plus(testingFolder.asFile)
        return subprojectRoots.map { it.listFiles(File::isDirectory).asList() }.flatten()
    }

    private
    fun generateSubprojects(): List<GradleSubproject> {

    @TaskAction
    def transform() {
        logging.captureStandardOutput(LogLevel.INFO)
        logging.captureStandardError(LogLevel.INFO)

        def destDir = destinationDirectory.get().asFile
        fs.delete {
            delete(destDir, temporaryDir)
        }

        def xslClasspath = classpath.plus(objects.fileCollection().from(ClasspathUtil.getClasspathForClass(XslTransformer)))

        fs.copy {

@DisableCachingByDefault(because = "Not worth caching")
abstract class GenerateSubprojectsInfo : SubprojectsInfo() {

    @TaskAction
    fun generateSubprojectsInfo() {
        subprojectsJson.asFile.writeText(generateSubprojectsJson())
    }

    companion object {
        internal
        const val TASK_NAME = "generateSubprojectsInfo"
    }