diff options
| -rw-r--r-- | poezio/logger.py | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/poezio/logger.py b/poezio/logger.py index 329b9283..23a4fbeb 100644 --- a/poezio/logger.py +++ b/poezio/logger.py @@ -289,6 +289,36 @@ def build_log_message(nick: str, return logged_msg + ''.join(' %s\n' % line for line in lines) +def iterate_messages_reverse(filepath: Path): + """Get the latest messages from the log file, one at a time. + + :param fd: the file descriptor + """ + try: + with open(filepath, 'rb') as fd: + with mmap.mmap(fd.fileno(), 0, prot=mmap.PROT_READ) as m: + # start of messages begin with MI or MR, after a \n + pos = m.rfind(b"\nM") + 1 + lines = parse_log_lines( + m[pos:-1].decode(errors='replace').splitlines() + ) + if lines: + yield lines[0] + # number of message found so far + count = 0 + while pos > 0: + count += 1 + old_pos = pos + pos = m.rfind(b"\nM", 0, pos) + 1 + lines = parse_log_lines( + m[pos:old_pos].decode(errors='replace').splitlines() + ) + if lines: + yield lines[0] + except OSError: + pass + + def _get_lines_from_fd(fd: IO[Any], nb: int = 10) -> List[str]: """ Get the last log lines from a fileno with mmap |