struct commit_list *commit_list_insert(struct commit *item,
                                        struct commit_list **list);
+struct commit_list **commit_list_append(struct commit *commit,
+                                       struct commit_list **next);
 unsigned commit_list_count(const struct commit_list *l);
 struct commit_list *commit_list_insert_by_date(struct commit *item,
                                    struct commit_list **list);
        const char *after_subject;
        int preserve_subject;
        enum date_mode date_mode;
+       unsigned date_mode_explicit:1;
        int need_8bit_cte;
        int show_notes;
        struct reflog_walk_info *reflog_info;
 
 extern int commit_tree(const struct strbuf *msg, unsigned char *tree,
                       struct commit_list *parents, unsigned char *ret,
-                      const char *author);
+                      const char *author, const char *sign_commit);
 
 extern int commit_tree_extended(const struct strbuf *msg, unsigned char *tree,
                                struct commit_list *parents, unsigned char *ret,
-                               const char *author,
+                               const char *author, const char *sign_commit,
                                struct commit_extra_header *);
 
-extern struct commit_extra_header *read_commit_extra_headers(struct commit *);
-extern struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len);
+extern struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
+extern struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **);
 
 extern void free_commit_extra_headers(struct commit_extra_header *extra);
 
  */
 struct commit *get_merge_parent(const char *name);
 
+extern int parse_signed_commit(const unsigned char *sha1,
+                              struct strbuf *message, struct strbuf *signature);
 #endif /* COMMIT_H */