Github user ran-z commented on a diff in the pull request:
https://github.com/apache/incubator-ariatosca/pull/97#discussion_r111683488
--- Diff: aria/cli/cli/aria.py ---
@@ -0,0 +1,458 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License 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 sys
+import difflib
+import StringIO
+import traceback
+from functools import wraps
+
+import click
+
+from ..env import env, logger
+from ..cli import helptexts
+from ..inputs import inputs_to_dict
+from ..constants import SAMPLE_SERVICE_TEMPLATE_FILENAME
+from ...utils.exceptions import get_exception_as_string
+
+
+CLICK_CONTEXT_SETTINGS = dict(
+ help_option_names=['-h', '--help'],
+ token_normalize_func=lambda param: param.lower())
+
+
+class MutuallyExclusiveOption(click.Option):
+ """Makes options mutually exclusive. The option must pass a `cls`
argument
+ with this class name and a `mutually_exclusive` argument with a list of
+ argument names it is mutually exclusive with.
+
+ NOTE: All mutually exclusive options must use this. It's not enough to
+ use it in just one of the options.
+ """
+
+ def __init__(self, *args, **kwargs):
+ self.mutually_exclusive = set(kwargs.pop('mutually_exclusive', []))
+ self.mutuality_error_message = \
+ kwargs.pop('mutuality_error_message',
+ helptexts.DEFAULT_MUTUALITY_MESSAGE)
+ self.mutuality_string = ', '.join(self.mutually_exclusive)
+ if self.mutually_exclusive:
+ help = kwargs.get('help', '')
+ kwargs['help'] = (
+ '{0}. This argument is mutually exclusive with '
+ 'arguments: [{1}] ({2})'.format(
+ help,
+ self.mutuality_string,
+ self.mutuality_error_message))
+ super(MutuallyExclusiveOption, self).__init__(*args, **kwargs)
+
+ def handle_parse_result(self, ctx, opts, args):
+ if self.mutually_exclusive.intersection(opts) and self.name in
opts:
+ raise click.UsageError(
+ 'Illegal usage: `{0}` is mutually exclusive with '
+ 'arguments: [{1}] ({2}).'.format(
+ self.name,
+ self.mutuality_string,
+ self.mutuality_error_message))
+ return super(MutuallyExclusiveOption, self).handle_parse_result(
+ ctx, opts, args)
+
+
+def _format_version_data(version_data,
+ prefix=None,
+ suffix=None,
+ infix=None):
+ all_data = version_data.copy()
+ all_data['prefix'] = prefix or ''
+ all_data['suffix'] = suffix or ''
+ all_data['infix'] = infix or ''
+ output = StringIO.StringIO()
+ output.write('{prefix}{version}'.format(**all_data))
+ output.write('{suffix}'.format(**all_data))
+ return output.getvalue()
+
+
+def show_version(ctx, param, value):
--- End diff --
its better as an option to the main command
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