/**
 * Walks the local tree before an upload
 *
 * The tree is counted the same way the transport sees it: `scp -r` follows
 * symlinks and copies their targets, and stops on a broken link or a cycle.
 * Counting it differently would make the tool's answer diverge from what
 * actually went out: the file count and size would come out too low, and
 * the hash check would miss part of the tree.
 *
 * A broken link or a cycle is caught here, before the transfer. The transport
 * would notice them too, but only halfway through — part of the tree would
 * already be sitting on the server by then.
 */
/**
 * Relative paths of every file in the tree.
 *
 * A symlink to a file counts as a file, and a symlink to a directory is
 * followed — exactly what the transport will bring over.
 */
export declare function listTreeFiles(root: string): Promise<string[]>;