Function _find_binary_writer

src/click/_compat.py:191–206

(stream: t.IO[t.Any])

def _find_binary_writer(stream: t.IO[t.Any]) -> t.BinaryIO | None:
    # We need to figure out if the given stream is already binary.
    # This can happen because the official docs recommend detaching
    # the streams to get binary streams.  Some code might do this, so
    # we need to deal with this case explicitly.
    if _is_binary_writer(stream, False):
        return t.cast(t.BinaryIO, stream)

    buf = getattr(stream, "buffer", None)

    # Same situation here; this time we assume that the buffer is
    # actually binary in case it's closed.
    if buf is not None and _is_binary_writer(buf, True):
        return t.cast(t.BinaryIO, buf)

    return None


def _stream_is_misconfigured(stream: t.TextIO) -> bool: