import java.io.File


internal
fun userHome() = File(System.getProperty("user.home"))


inline fun <T : AutoCloseable, U> T.useToRun(action: T.() -> U): U =
    use { run(action) }


internal
fun File.isParentOf(child: File): Boolean =
    child.canonicalPath.startsWith(canonicalPath)


/**
 * List files ordered by filename for reproducibility.
 * Never returns null.
 */