#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
/* ls-files */
-void overlay_tree_on_cache(const char *tree_name, const char *prefix);
+void overlay_tree_on_index(struct index_state *istate,
+ const char *tree_name, const char *prefix);
char *alias_lookup(const char *alias);
int split_cmdline(char *cmdline, const char ***argv);