utils.py

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# Copyright (c) 2022, Peter David Fagan
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# Author: Peter David Fagan

import sys
import traceback
import yaml

from tempfile import NamedTemporaryFile


def create_params_file_from_dict(params, node_name):
    with NamedTemporaryFile(mode="w", prefix="launch_params_", delete=False) as h:
        param_file_path = h.name
        param_dict = {node_name: {"ros__parameters": params}}
        yaml.dump(param_dict, h, default_flow_style=False)
        return param_file_path


def get_launch_params_filepath():
    """
    A utility that returns the path value after argument --params-file.
    """
    try:
        cli_args = sys.argv
        return sys.argv[sys.argv.index("--params-file") + 1]
    except ValueError:
        return "Failed to parse params file path from command line arguments. Check that --params-file command line argument is specified."