Method callback

zappa/cli.py:2509–2557

Allows the execution of custom code between creation of the zip file and deployment to AWS. :return: None

(self, position)

    ##

    def callback(self, position):
        """
        Allows the execution of custom code between creation of the zip file and deployment to AWS.
        :return: None
        """

        callbacks = self.stage_config.get("callbacks", {})
        callback = callbacks.get(position)

        if callback:
            (mod_path, cb_func_name) = callback.rsplit(".", 1)

            try:  # Prefer callback in working directory
                if mod_path.count(".") >= 1:  # Callback function is nested in a folder
                    (mod_folder_path, mod_name) = mod_path.rsplit(".", 1)
                    mod_folder_path_fragments = mod_folder_path.split(".")
                    working_dir = os.path.join(os.getcwd(), *mod_folder_path_fragments)
                else:
                    mod_name = mod_path
                    working_dir = os.getcwd()

                working_dir_importer = pkgutil.get_importer(working_dir)
                module_ = working_dir_importer.find_spec(mod_name).loader.load_module(mod_name)

            except (ImportError, AttributeError):
                try:  # Callback func might be in virtualenv
                    module_ = importlib.import_module(mod_path)
                except ImportError:  # pragma: no cover
                    raise ClickException(
                        click.style("Failed ", fg="red")
                        + "to "
                        + click.style(
                            "import {position} callback ".format(position=position),
                            bold=True,
                        )
                        + 'module: "{mod_path}"'.format(mod_path=click.style(mod_path, bold=True))
                    )

            if not hasattr(module_, cb_func_name):  # pragma: no cover
                raise ClickException(
                    click.style("Failed ", fg="red")
                    + "to "
                    + click.style("find {position} callback ".format(position=position), bold=True)
                    + 'function: "{cb_func_name}" '.format(cb_func_name=click.style(cb_func_name, bold=True))
                    + 'in module "{mod_path}"'.format(mod_path=mod_path)
                )

            cb_func = getattr(module_, cb_func_name)
            cb_func(self)  # Call the function passing self

    def check_for_update(self):
        """