def add_html_report_optgroup(parser):
    """
    Option group for the HTML report format
    """
    g = parser.add_argument_group('HTML Report Options')
    g.add_argument('--html-stylesheet', action='append', dest=
        'html_stylesheets', default=list())
    g.add_argument('--html-javascript', action='append', dest=
        'html_javascripts', default=list())
    g.add_argument('--html-copy-data', action='store', default=None, help=
        'Copy default resources to the given directory and enable them in the template'
        )
