369 lines
11 KiB
Python
369 lines
11 KiB
Python
#
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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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import json
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import re
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import sys
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import textwrap
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import uuid
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import pkg_resources
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import prettytable
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import six
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from novaclient import exceptions
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from novaclient.openstack.common import cliutils
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from novaclient.openstack.common.gettextutils import _
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from novaclient.openstack.common import jsonutils
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from novaclient.openstack.common import strutils
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arg = cliutils.arg
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env = cliutils.env
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VALID_KEY_REGEX = re.compile(r"[\w\.\- :]+$", re.UNICODE)
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def add_resource_manager_extra_kwargs_hook(f, hook):
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"""Add hook to bind CLI arguments to ResourceManager calls.
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The `do_foo` calls in shell.py will receive CLI args and then in turn pass
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them through to the ResourceManager. Before passing through the args, the
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hooks registered here will be called, giving us a chance to add extra
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kwargs (taken from the command-line) to what's passed to the
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ResourceManager.
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"""
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if not hasattr(f, 'resource_manager_kwargs_hooks'):
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f.resource_manager_kwargs_hooks = []
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names = [h.__name__ for h in f.resource_manager_kwargs_hooks]
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if hook.__name__ not in names:
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f.resource_manager_kwargs_hooks.append(hook)
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def get_resource_manager_extra_kwargs(f, args, allow_conflicts=False):
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"""Return extra_kwargs by calling resource manager kwargs hooks."""
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hooks = getattr(f, "resource_manager_kwargs_hooks", [])
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extra_kwargs = {}
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for hook in hooks:
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hook_kwargs = hook(args)
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hook_name = hook.__name__
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conflicting_keys = set(hook_kwargs.keys()) & set(extra_kwargs.keys())
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if conflicting_keys and not allow_conflicts:
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msg = (_("Hook '%(hook_name)s' is attempting to redefine "
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"attributes '%(conflicting_keys)s'") %
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{'hook_name': hook_name,
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'conflicting_keys': conflicting_keys})
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raise exceptions.NoUniqueMatch(msg)
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extra_kwargs.update(hook_kwargs)
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return extra_kwargs
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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('volume')
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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 pretty_choice_list(l):
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return ', '.join("'%s'" % i for i in l)
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def pretty_choice_dict(d):
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"""Returns a formatted dict as 'key=value'."""
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return pretty_choice_list(['%s=%s' % (k, d[k]) for k in sorted(d.keys())])
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def print_list(objs, fields, formatters={}, sortby_index=None):
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if sortby_index is None:
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sortby = None
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else:
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sortby = fields[sortby_index]
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mixed_case_fields = ['serverId']
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pt = prettytable.PrettyTable([f for f in fields], caching=False)
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pt.align = 'l'
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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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if data is None:
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data = '-'
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row.append(data)
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pt.add_row(row)
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if sortby is not None:
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result = strutils.safe_encode(pt.get_string(sortby=sortby))
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else:
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result = strutils.safe_encode(pt.get_string())
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print(result)
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def _flatten(data, prefix=None):
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"""Flatten a dict, using name as a prefix for the keys of dict.
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>>> _flatten('cpu_info', {'arch':'x86_64'})
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[('cpu_info_arch': 'x86_64')]
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"""
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if isinstance(data, dict):
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for key, value in six.iteritems(data):
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new_key = '%s_%s' % (prefix, key) if prefix else key
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if isinstance(value, (dict, list)):
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for item in _flatten(value, new_key):
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yield item
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else:
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yield new_key, value
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else:
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yield prefix, data
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def flatten_dict(data):
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"""Return a new dict whose sub-dicts have been merged into the
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original. Each of the parents keys are prepended to the child's
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to prevent collisions. Any string elements will be JSON parsed
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before flattening.
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>>> flatten_dict({'service': {'host':'cloud9@compute-068', 'id': 143}})
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{'service_host': colud9@compute-068', 'service_id': 143}
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"""
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data = data.copy()
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# Try and decode any nested JSON structures.
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for key, value in six.iteritems(data):
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if isinstance(value, six.string_types):
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try:
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data[key] = json.loads(value)
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except ValueError:
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pass
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return dict(_flatten(data))
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def print_dict(d, dict_property="Property", dict_value="Value", wrap=0):
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pt = prettytable.PrettyTable([dict_property, dict_value], caching=False)
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pt.align = 'l'
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for k, v in sorted(d.items()):
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# convert dict to str to check length
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if isinstance(v, (dict, list)):
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v = jsonutils.dumps(v)
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if wrap > 0:
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v = textwrap.fill(str(v), wrap)
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# if value has a newline, add in multiple rows
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# e.g. fault with stacktrace
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if v and isinstance(v, six.string_types) and r'\n' in v:
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lines = v.strip().split(r'\n')
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col1 = k
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for line in lines:
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pt.add_row([col1, line])
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col1 = ''
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else:
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if v is None:
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v = '-'
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pt.add_row([k, v])
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result = strutils.safe_encode(pt.get_string())
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print(result)
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def find_resource(manager, name_or_id, **find_args):
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"""Helper for the _find_* methods."""
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# for str id which is not uuid (for Flavor and Keypair search currently)
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if getattr(manager, 'is_alphanum_id_allowed', False):
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try:
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return manager.get(name_or_id)
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except exceptions.NotFound:
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pass
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# try to get entity as integer id
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try:
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return manager.get(int(name_or_id))
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except (TypeError, ValueError, exceptions.NotFound):
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pass
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# now try to get entity as uuid
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try:
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tmp_id = strutils.safe_encode(name_or_id)
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uuid.UUID(tmp_id)
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return manager.get(tmp_id)
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except (TypeError, 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, **find_args)
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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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resource = getattr(manager, 'resource_class', None)
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name_attr = resource.NAME_ATTR if resource else 'name'
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kwargs = {name_attr: name_or_id}
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kwargs.update(find_args)
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return manager.find(**kwargs)
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except exceptions.NotFound:
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msg = _("No %(class)s with a name or ID of '%(name)s' exists.") % \
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{'class': manager.resource_class.__name__.lower(),
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'name': name_or_id}
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raise exceptions.CommandError(msg)
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except exceptions.NoUniqueMatch:
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msg = (_("Multiple %(class)s matches found for '%(name)s', use an ID "
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"to be more specific.") %
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{'class': manager.resource_class.__name__.lower(),
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'name': name_or_id})
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raise exceptions.CommandError(msg)
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def _format_servers_list_networks(server):
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output = []
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for (network, addresses) in server.networks.items():
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if len(addresses) == 0:
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continue
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addresses_csv = ', '.join(addresses)
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group = "%s=%s" % (network, addresses_csv)
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output.append(group)
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return '; '.join(output)
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def _format_security_groups(groups):
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return ', '.join(group['name'] for group in groups)
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def _format_field_name(attr):
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"""Format an object attribute in a human-friendly way."""
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# Split at ':' and leave the extension name as-is.
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parts = attr.rsplit(':', 1)
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name = parts[-1].replace('_', ' ')
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# Don't title() on mixed case
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if name.isupper() or name.islower():
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name = name.title()
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parts[-1] = name
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return ': '.join(parts)
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def _make_field_formatter(attr, filters=None):
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"""
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Given an object attribute, return a formatted field name and a
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formatter suitable for passing to print_list.
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Optionally pass a dict mapping attribute names to a function. The function
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will be passed the value of the attribute and should return the string to
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display.
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"""
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filter_ = None
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if filters:
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filter_ = filters.get(attr)
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def get_field(obj):
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field = getattr(obj, attr, '')
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if field and filter_:
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field = filter_(field)
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return field
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name = _format_field_name(attr)
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formatter = get_field
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return name, formatter
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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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def import_class(import_str):
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"""Returns a class from a string including module and class."""
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mod_str, _sep, class_str = import_str.rpartition('.')
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__import__(mod_str)
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return getattr(sys.modules[mod_str], class_str)
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def _load_entry_point(ep_name, name=None):
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"""Try to load the entry point ep_name that matches name."""
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for ep in pkg_resources.iter_entry_points(ep_name, name=name):
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try:
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return ep.load()
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except (ImportError, pkg_resources.UnknownExtra, AttributeError):
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continue
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def is_integer_like(val):
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"""Returns validation of a value as an integer."""
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try:
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int(val)
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return True
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except (TypeError, ValueError, AttributeError):
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return False
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def validate_flavor_metadata_keys(keys):
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for key in keys:
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valid_name = VALID_KEY_REGEX.match(key)
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if not valid_name:
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msg = _('Invalid key: "%s". Keys may only contain letters, '
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'numbers, spaces, underscores, periods, colons and '
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'hyphens.')
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raise exceptions.CommandError(msg % key)
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