prune:1,
no_merges:1,
no_walk:1,
+ show_all:1,
remove_empty_trees:1,
simplify_history:1,
lifo:1,
extern void add_pending_object(struct rev_info *revs, struct object *obj, const char *name);
+extern void add_head_to_pending(struct rev_info *);
+
enum commit_action {
commit_ignore,
commit_show,