boundary:2,
count:1,
left_right:1,
+ left_only:1,
+ right_only:1,
rewrite_parents:1,
print_parents:1,
show_source:1,
extern int prepare_revision_walk(struct rev_info *revs);
extern struct commit *get_revision(struct rev_info *revs);
+extern char *get_revision_mark(const struct rev_info *revs, const struct commit *commit);
extern void mark_parents_uninteresting(struct commit *commit);
extern void mark_tree_uninteresting(struct tree *tree);