abstract class SystemPropertyRead extends BuildInputRead {
    static SystemPropertyRead systemGetProperty(String name) {
        return new SystemPropertyRead() {
            @Override
            String getKotlinExpression() {
                return "System.getProperty(\"$name\")"
            }
        }
    }

    static SystemPropertyRead systemGetPropertyWithDefault(String name, String defaultValue) {

import java.io.File


@EventScope(Scope.BuildTree::class)
interface UndeclaredBuildInputListener {
    /**
     * Called when an undeclared system property read happens.
     */
    fun systemPropertyRead(key: String, value: Any?, consumer: String?)

    fun envVariableRead(key: String, value: String?, consumer: String?)

    fun fileOpened(file: File, consumer: String?)

        if (allowedProperties.contains(key) || Workarounds.canReadSystemProperty(consumer)) {
            return
        }
        undeclaredInputBroadcast.systemPropertyRead(key, value, consumer)
    }

    override fun systemPropertyChanged(key: Any, value: Any?, consumer: String) {
        environmentChangeTracker.systemPropertyChanged(key, value, consumer)
    }