@get:Optional
        val buildTimestampFromGradleProperty: Property<String>

        @get:Optional
        val enableConfigurationCacheForDocsTests: Property<Boolean>

        val runningOnCi: Property<Boolean>

        val runningInstallTask: Property<Boolean>
        val runningDocsTestTask: Property<Boolean>
    }

    override fun obtain(): String? = parameters.run {

    providers.of(BuildTimestampValueSource::class) {
        parameters {
            buildTimestampFromBuildReceipt = buildTimestampFromBuildReceipt()
            buildTimestampFromGradleProperty = buildTimestamp
            runningOnCi = buildRunningOnCi
            runningInstallTask = provider { isRunningInstallTask() }
            runningDocsTestTask = provider { isRunningDocsTestTask() }

            request.setInteractiveMode(false);
        } else {
            boolean runningOnCI = isRunningOnCI(cliRequest.getSystemProperties());
            if (runningOnCI) {
                slf4jLogger.info(
                        "Making this build non-interactive, because the environment variable CI equals \"true\"."