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#!/usr/bin/env python
# encoding: utf-8
#
# Copyright (c) 2015, Canonical Ltd.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""A trivial program that adds two numbers with Guacamole."""
from __future__ import absolute_import, print_function, unicode_literals
from guacamole import Command
class Addder(Command):
"""Add two numbers together."""
def register_arguments(self, parser):
"""
Guacamole method used by the argparse ingredient.
:param parser:
Argument parser (from :mod:`argparse`) specific to this command.
"""
parser.add_argument('x', type=int, help='the first value')
parser.add_argument('y', type=int, help='the second value')
def invoked(self, ctx):
"""
Guacamole method used by the command ingredient.
:param ctx:
The guacamole context object. Context provides access to all
features of guacamole. The argparse ingredient adds the ``args``
attribute to it. That attribute contains the result of parsing
command line arguments.
:returns:
The return code of the command. Guacamole translates ``None`` to a
successful exit status (return code zero).
"""
print("{} + {} = {}".format(
ctx.args.x,
ctx.args.y,
ctx.args.x + ctx.args.y))
if __name__ == '__main__':
Addder().main()
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