abstract class Layout {
        abstract fun fileForRead(stateType: StateType): ConfigurationCacheStateFile

        abstract fun fileFor(stateType: StateType): ConfigurationCacheStateFile
    }

    private
    inner class WriteableLayout(
        private val cacheDir: File,
        private val onFileAccess: (File) -> Unit
    ) : Layout() {

        // Collect fingerprint entries for any projects whose state was reused from cache
        if (reusedProjects.isNotEmpty()) {
            readFingerprintFile(layout.fileForRead(StateType.ProjectFingerprint)) { host ->
                cacheFingerprintController.run {
                    collectFingerprintForReusedProjects(host, reusedProjects)
                }
            }
        }