typedef int (*write_archive_entry_fn_t)(struct archiver_args *args, const unsigned char *sha1, const char *path, size_t pathlen, unsigned int mode, void *buffer, unsigned long size);
extern int write_archive_entries(struct archiver_args *args, write_archive_entry_fn_t write_entry);
-extern int write_archive(int argc, const char **argv, const char *prefix, int setup_prefix);
+extern int write_archive(int argc, const char **argv, const char *prefix, int setup_prefix, const char *name_hint);
+
+const char *archive_format_from_filename(const char *filename);
#endif /* ARCHIVE_H */