channel_logging.py 文件源码

def emit(self, record: logging.LogRecord):
        if record.levelno != self.level:
            return  # only log the handlers level to the handlers channel, not above

        msg = self.format(record)

        start = msg.find('```py\n')
        if start != -1:
            msg, trace = msg[:start], msg[start:]
        else:
            trace = None

        # the actual log message
        for line in msg.split('\n'):
            # if this is a small codeblock and goes over multiple messages it will break out
            # so we check that each chunk (besides the first) starts and stops with a backtick
            for idx, chunk in enumerate(line[x:x + 1994] for x in range(0, len(line), 1994)):
                # ugh
                if not chunk.endswith('`'):
                    chunk = f'{chunk}`'
                if not chunk.startswith('`'):
                    chunk = f'`{chunk}'

                self._buffer.append(chunk)

        # the traceback, sent separately to be in a big codeblock for syntax highlighting
        if trace is not None:
            # cut off the original codeblock
            trace = trace[6:-3]

            paginator = commands.Paginator(prefix='```py\n', suffix='```')

            for line in trace.split('\n'):
                for chunk in (line[x:x + 1987] for x in range(0, len(line), 1987)):
                    paginator.add_line(chunk)

            for page in paginator.pages:
                self._buffer.append(page)

        self._can_emit.set()