strbuf_append_ext_header 240 archive-tar.c strbuf_append_ext_header(&ext_header, "path", strbuf_append_ext_header 264 archive-tar.c strbuf_append_ext_header(&ext_header, "linkpath", strbuf_append_ext_header 300 archive-tar.c strbuf_append_ext_header(&ext_header, "comment", sha1_to_hex(sha1), 40);