# Copyright 2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License"). You

# may not use this file except in compliance with the License. A copy of

# the License is located at

#

# http://aws.amazon.com/apache2.0/

#

# or in the "license" file accompanying this file. This file is

# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF

# ANY KIND, either express or implied. See the License for the specific

# language governing permissions and limitations under the License.

import json

from awscli.paramfile import get_paramfile

from awscli.argprocess import ParamError

from awscli.customizations.arguments import OverrideRequiredArgsArgument

def register_cli_input_json(cli):

cli.register('building-argument-table', add_cli_input_json)

def add_cli_input_json(session, argument_table, **kwargs):

# This argument cannot support operations with streaming output which

# is designated by the argument name `outfile`.

if 'outfile' not in argument_table:

cli_input_json_argument = CliInputJSONArgument(session)

cli_input_json_argument.add_to_arg_table(argument_table)

class CliInputJSONArgument(OverrideRequiredArgsArgument):

"""This argument inputs a JSON string as the entire input for a command.

Ideally, the value to this argument should be a filled out JSON file

generated by ``--generate-cli-skeleton``. The items in the JSON string

will not clobber other arguments entered into the command line.

"""

ARG_DATA = {

'name': 'cli-input-json',

'help_text': 'Performs service operation based on the JSON string '

'provided. The JSON string follows the format provided '

'by ``--generate-cli-skeleton``. If other arguments are '

'provided on the command line, the CLI values will override '

'the JSON-provided values.'

}

def __init__(self, session):

super(CliInputJSONArgument, self).__init__(session)

def _register_argument_action(self):

self._session.register(

'calling-command.*', self.add_to_call_parameters)

super(CliInputJSONArgument, self)._register_argument_action()

def add_to_call_parameters(self, call_parameters, parsed_args,

parsed_globals, **kwargs):

# Check if ``--cli-input-json`` was specified in the command line.

input_json = getattr(parsed_args, 'cli_input_json', None)

if input_json is not None:

# Retrieve the JSON from the file if needed.

retrieved_json = get_paramfile(input_json)

# Nothing was retrieved from the file. So assume the argument

# is already a JSON string.

if retrieved_json is None:

retrieved_json = input_json

try:

# Try to load the JSON string into a python dictionary

input_data = json.loads(retrieved_json)

except ValueError as e:

raise ParamError(

self.name, "Invalid JSON: %s\nJSON received: %s"

% (e, retrieved_json))

# Add the members from the input JSON to the call parameters.

self._update_call_parameters(call_parameters, input_data)

def _update_call_parameters(self, call_parameters, input_data):

for input_key in input_data.keys():

# Only add the values to ``call_parameters`` if not already

# present.

if input_key not in call_parameters:

call_parameters[input_key] = input_data[input_key]