int commit_contains(struct ref_filter *filter, struct commit *commit,
struct commit_list *list, struct contains_cache *cache);
+int reachable(struct commit *from, unsigned int with_flag,
+ unsigned int assign_flag, time_t min_commit_date);
+
+/*
+ * Determine if every commit in 'from' can reach at least one commit
+ * that is marked with 'with_flag'. As we traverse, use 'assign_flag'
+ * as a marker for commits that are already visited. Do not walk
+ * commits with date below 'min_commit_date'.
+ */
+int can_all_from_reach_with_flag(struct object_array *from,
+ unsigned int with_flag,
+ unsigned int assign_flag,
+ time_t min_commit_date);
+
#endif