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cliinputjson.py
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# 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, LOCAL_PREFIX_MAP
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. It is not possible to pass '
'arbitrary binary values using a JSON-provided value as '
'the string will be taken literally.'
}
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, LOCAL_PREFIX_MAP)
# 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]