cli_app.utils.stdin¶

def is_stdin_piped() -> bool:
    """Return ``True`` when stdin is connected to a pipe rather than a TTY."""
    return not sys.stdin.isatty()

def iter_stdin_lines() -> Iterator[str]:
    """Yield lines from stdin with trailing newlines stripped."""
    for line in sys.stdin:
        yield line.rstrip("\n")

def read_stdin() -> str:
    """Read and return all content from stdin."""
    return sys.stdin.read()

def read_stdin_if_piped() -> str | None:
    """Return stdin content when piped; ``None`` when stdin is a TTY."""
    return read_stdin() if is_stdin_piped() else None