285 lines
7.9 KiB
Python
285 lines
7.9 KiB
Python
# Copyright 2011 OpenStack Foundation
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# Copyright 2013 Rackspace Hosting
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from __future__ import print_function
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import os
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import sys
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import uuid
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import simplejson as json
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import six
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import prettytable
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from troveclient.openstack.common.apiclient import exceptions
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from troveclient.openstack.common import strutils
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def arg(*args, **kwargs):
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"""Decorator for CLI args."""
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def _decorator(func):
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add_arg(func, *args, **kwargs)
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return func
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return _decorator
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def env(*vars, **kwargs):
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"""
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returns the first environment variable set
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if none are non-empty, defaults to '' or keyword arg default
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"""
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for v in vars:
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value = os.environ.get(v, None)
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if value:
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return value
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return kwargs.get('default', '')
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def add_arg(f, *args, **kwargs):
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"""Bind CLI arguments to a shell.py `do_foo` function."""
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if not hasattr(f, 'arguments'):
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f.arguments = []
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# NOTE(sirp): avoid dups that can occur when the module is shared across
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# tests.
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if (args, kwargs) not in f.arguments:
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# Because of the semantics of decorator composition if we just append
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# to the options list positional options will appear to be backwards.
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f.arguments.insert(0, (args, kwargs))
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def unauthenticated(f):
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"""
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Adds 'unauthenticated' attribute to decorated function.
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Usage:
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@unauthenticated
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def mymethod(f):
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...
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"""
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f.unauthenticated = True
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return f
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def isunauthenticated(f):
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"""
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Checks to see if the function is marked as not requiring authentication
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with the @unauthenticated decorator. Returns True if decorator is
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set to True, False otherwise.
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"""
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return getattr(f, 'unauthenticated', False)
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def service_type(stype):
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"""
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Adds 'service_type' attribute to decorated function.
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Usage:
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@service_type('database')
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def mymethod(f):
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...
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"""
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def inner(f):
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f.service_type = stype
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return f
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return inner
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def get_service_type(f):
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"""
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Retrieves service type from function
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"""
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return getattr(f, 'service_type', None)
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def translate_keys(collection, convert):
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for item in collection:
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keys = list(item.__dict__.keys())
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for from_key, to_key in convert:
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if from_key in keys and to_key not in keys:
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setattr(item, to_key, item._info[from_key])
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def _output_override(objs, print_as):
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"""
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If an output override global flag is set, print with override
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raise BaseException if no printing was overridden.
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"""
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if 'json_output' in globals() and json_output:
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if print_as == 'list':
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new_objs = []
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for o in objs:
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new_objs.append(o._info)
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elif print_as == 'dict':
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new_objs = objs
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# pretty print the json
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print(json.dumps(new_objs, indent=' '))
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elif 'xml_output' in globals():
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print('not implemented')
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else:
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raise BaseException('No valid output override')
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def _print(pt, order):
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if sys.version_info >= (3, 0):
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print(pt.get_string(sortby=order))
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else:
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print(strutils.safe_encode(pt.get_string(sortby=order)))
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def print_list(objs, fields, formatters={}, order_by=None):
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try:
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_output_override(objs, 'list')
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return
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except BaseException:
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pass
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mixed_case_fields = []
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pt = prettytable.PrettyTable([f for f in fields], caching=False)
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pt.aligns = ['l' for f in fields]
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for o in objs:
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row = []
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for field in fields:
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if field in formatters:
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row.append(formatters[field](o))
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else:
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if field in mixed_case_fields:
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field_name = field.replace(' ', '_')
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else:
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field_name = field.lower().replace(' ', '_')
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data = getattr(o, field_name, '')
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row.append(data)
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pt.add_row(row)
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if order_by is None:
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order_by = fields[0]
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_print(pt, order_by)
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def print_dict(d, property="Property"):
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try:
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_output_override(d, 'dict')
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return
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except BaseException:
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pass
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pt = prettytable.PrettyTable([property, 'Value'], caching=False)
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pt.aligns = ['l', 'l']
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[pt.add_row(list(r)) for r in six.iteritems(d)]
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_print(pt, property)
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def find_resource(manager, name_or_id):
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"""Helper for the _find_* methods."""
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# first try to get entity as integer id
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try:
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if isinstance(name_or_id, int) or name_or_id.isdigit():
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return manager.get(int(name_or_id))
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except exceptions.NotFound:
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pass
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if sys.version_info <= (3, 0):
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name_or_id = strutils.safe_decode(name_or_id)
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# now try to get entity as uuid
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try:
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uuid.UUID(name_or_id)
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return manager.get(name_or_id)
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except (ValueError, exceptions.NotFound):
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pass
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try:
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try:
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return manager.find(human_id=name_or_id)
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except exceptions.NotFound:
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pass
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# finally try to find entity by name
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try:
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return manager.find(name=name_or_id)
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except exceptions.NotFound:
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try:
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return manager.find(display_name=name_or_id)
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except (UnicodeDecodeError, exceptions.NotFound):
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try:
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# Instances does not have name, but display_name
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return manager.find(display_name=name_or_id)
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except exceptions.NotFound:
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msg = "No %s with a name or ID of '%s' exists." % \
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(manager.resource_class.__name__.lower(), name_or_id)
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raise exceptions.CommandError(msg)
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except exceptions.NoUniqueMatch:
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msg = ("Multiple %s matches found for '%s', use an ID to be more"
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" specific." % (manager.resource_class.__name__.lower(),
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name_or_id))
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raise exceptions.CommandError(msg)
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class HookableMixin(object):
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"""Mixin so classes can register and run hooks."""
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_hooks_map = {}
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@classmethod
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def add_hook(cls, hook_type, hook_func):
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if hook_type not in cls._hooks_map:
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cls._hooks_map[hook_type] = []
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cls._hooks_map[hook_type].append(hook_func)
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@classmethod
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def run_hooks(cls, hook_type, *args, **kwargs):
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hook_funcs = cls._hooks_map.get(hook_type) or []
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for hook_func in hook_funcs:
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hook_func(*args, **kwargs)
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def safe_issubclass(*args):
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"""Like issubclass, but will just return False if not a class."""
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try:
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if issubclass(*args):
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return True
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except TypeError:
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pass
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return False
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# http://code.activestate.com/recipes/
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# 577257-slugify-make-a-string-usable-in-a-url-or-filename/
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def slugify(value):
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"""
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Normalizes string, converts to lowercase, removes non-alpha characters,
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and converts spaces to hyphens.
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From Django's "django/template/defaultfilters.py".
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Make use strutils.to_slug from openstack common
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"""
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return strutils.to_slug(value, incoming=None, errors="strict")
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def is_uuid_like(val):
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"""Returns validation of a value as a UUID.
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For our purposes, a UUID is a canonical form string:
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aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa
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"""
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try:
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return str(uuid.UUID(val)) == val
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except (TypeError, ValueError, AttributeError):
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return False
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