def format()

in usort/cli.py [0:0]

• 20 lines of code
• 9 McCabe index (conditional complexity)

def format(filenames: List[str]) -> int:
    """
    Format one or more paths

    This is intended to sort nodes separated by barriers, and that's it.
    We don't format them (aside from moving comments).  Black does the rest.
    When in doubt leave lines alone.
    """
    if not filenames:
        raise click.ClickException("Provide some filenames")

    if filenames[0].strip() == "-":
        success = usort_stdin()
        return 0 if success else 1

    return_code = 0
    for f in filenames:
        path = Path(f)
        for result in usort_path(path, write=True):
            if result.error:
                click.echo(f"Error sorting {result.path}: {result.error}")
                return_code |= 1
                continue

            for warning in result.warnings:
                click.echo(f"Warning at {result.path}:{warning.line} {warning.message}")

            if result.content != result.output:
                click.echo(f"Sorted {result.path}")

            print_benchmark(result.timings)

    return return_code