import sys
import argparse
from pathlib import Path
from ..configuration import Config
from ..message import Message, MessageError


def print_cmd(args: argparse.Namespace, config: Config) -> None:
    """
    Handler for the 'print' command.
    """
    fname = Path(args.file)
    try:
        message = Message.from_file(fname)
        if message:
            print(message.to_str(source_code_only=args.source_code_only))
    except MessageError:
        print(f"File is not a valid message: {args.file}")
        sys.exit(1)