Main entrypoint method.

        Returns
        -------
        new_nodes : `list`
            Nodes to add to the doctree.

def run(self):
        """Main entrypoint method.

        Returns
        -------
        new_nodes : `list`
            Nodes to add to the doctree.
        """
        if getLogger is not None:
            # Sphinx 1.6+
            logger = getLogger(__name__)
        else:
            # Previously Sphinx's app was also the logger
            logger = self.state.document.settings.env.app

        env = self.state.document.settings.env
        new_nodes = []

        # Get skip list
        skipped_modules = self._parse_skip_option()

        # List of homepage documents for each module
        module_index_files = []

        # Collect paths with the form `modules/<module-name>/index`
        for docname in _filter_index_pages(env.found_docs, 'modules'):
            logger.debug('module-toctree found %s', docname)
            if self._parse_module_name(docname) in skipped_modules:
                logger.debug('module-toctree skipped %s', docname)
                continue
            module_index_files.append(docname)
        module_index_files.sort()
        entries = [(None, docname) for docname in module_index_files]
        logger.debug('module-toctree found %d modules',
                     len(module_index_files))

        # Add the toctree's node itself
        subnode = _build_toctree_node(
            parent=env.docname,
            entries=entries,
            includefiles=module_index_files,
            caption=None)
        set_source_info(self, subnode)  # Sphinx TocTree does this.

        wrappernode = docutils.nodes.compound(classes=['toctree-wrapper',
                                                       'module-toctree'])
        wrappernode.append(subnode)
        self.add_name(wrappernode)
        new_nodes.append(wrappernode)

        return new_nodes