Method merge_parameters

awscli/customizations/cloudformation/deploy.py:439–465

CloudFormation CreateChangeset requires a value for every parameter from the template, either specifying a new value or use previous value. For convenience, this method will accept new parameter values and generates a dict of all parameters in a format that ChangeSet

(self, template_dict, parameter_overrides)

        return 0

    def merge_parameters(self, template_dict, parameter_overrides):
        """
        CloudFormation CreateChangeset requires a value for every parameter
        from the template, either specifying a new value or use previous value.
        For convenience, this method will accept new parameter values and
        generates a dict of all parameters in a format that ChangeSet API
        will accept

        :param parameter_overrides:
        :return:
        """
        parameter_values = []

        if not isinstance(template_dict.get("Parameters", None), dict):
            return parameter_values

        for key, value in template_dict["Parameters"].items():
            obj = {"ParameterKey": key}

            if key in parameter_overrides:
                obj["ParameterValue"] = parameter_overrides[key]
            else:
                obj["UsePreviousValue"] = True

            parameter_values.append(obj)

        return parameter_values

    def _parse_input_as_json(self, arg_value):
        # In case of reading from file it'll be string and in case