malboxes.py 文件源码

def prepare_packer_template(config, template_name):
    """
    Prepares a packer template JSON file according to configuration and writes
    it into a temporary location where packer later expects it.

    Uses jinja2 template syntax to generate the resulting JSON file.
    Templates are in templates/ and snippets in templates/snippets/.
    """
    try:
        template_fd = resource_stream(__name__,
                                     'templates/{}.json'.format(template_name))
    except FileNotFoundError:
        print("Template doesn't exist: {}".format(template_name))
        sys.exit(2)

    filepath = resource_filename(__name__, 'templates/')
    env = Environment(loader=FileSystemLoader(filepath), autoescape=False,
                      trim_blocks=True, lstrip_blocks=True)
    template = env.get_template("{}.json".format(template_name))

    # write to temporary file
    f = create_cachefd('{}.json'.format(template_name))
    f.write(template.render(config)) # pylint: disable=no-member
    f.close()
    return f.name