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# Copyright 2012 OpenStack Foundation
# 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. 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.
from __future__ import print_function
import os
import textwrap
from oslo_serialization import jsonutils
from oslo_utils import encodeutils
from oslo_utils import importutils
import prettytable
import six
from ceilometerclient import exc
# Decorator for cli-args
def arg(*args, **kwargs):
def _decorator(func):
if 'help' in kwargs:
if 'default' in kwargs:
kwargs['help'] += " Defaults to %s." % kwargs['default']
required = kwargs.get('required', False)
if required:
kwargs['help'] += " Required."
# Because of the sematics of decorator composition if we just append
# to the options list positional options will appear to be backwards.
func.__dict__.setdefault('arguments', []).insert(0, (args, kwargs))
return func
return _decorator
def print_list(objs, fields, field_labels, formatters=None, sortby=0):
"""Print a list of objects as a table, one row per object.
:param objs: Iterable of :class:`Resource`
:param fields: Attributes that correspond to columns, in order
:param field_labels: Labels to use in the heading of the table, default to
fields.
:param formatters: `dict` of callables for field formatting
:param sortby: Index of the field for sorting table rows
"""
formatters = formatters or {}
if len(field_labels) != len(fields):
raise ValueError(("Field labels list %(labels)s has different number "
"of elements than fields list %(fields)s"),
{'labels': field_labels, 'fields': fields})
def _make_default_formatter(field):
return lambda o: getattr(o, field, '')
new_formatters = {}
for field, field_label in six.moves.zip(fields, field_labels):
if field in formatters:
new_formatters[field_label] = formatters[field]
else:
new_formatters[field_label] = _make_default_formatter(field)
kwargs = {} if sortby is None else {'sortby': field_labels[sortby]}
pt = prettytable.PrettyTable(field_labels)
pt.align = 'l'
for o in objs:
row = []
for field in field_labels:
if field in new_formatters:
row.append(new_formatters[field](o))
else:
field_name = field.lower().replace(' ', '_')
data = getattr(o, field_name, '')
row.append(data)
pt.add_row(row)
if six.PY3:
print(encodeutils.safe_encode(pt.get_string(**kwargs)).decode())
else:
print(encodeutils.safe_encode(pt.get_string(**kwargs)))
def nested_list_of_dict_formatter(field, column_names):
# (TMaddox) Because the formatting scheme actually drops the whole object
# into the formatter, rather than just the specified field, we have to
# extract it and then pass the value.
return lambda o: format_nested_list_of_dict(getattr(o, field),
column_names)
def format_nested_list_of_dict(l, column_names):
pt = prettytable.PrettyTable(caching=False, print_empty=False,
header=True, hrules=prettytable.FRAME,
field_names=column_names)
# Sort by values of first column
if l is not None:
l.sort(key=lambda k: k.get(column_names[0]))
for d in l:
pt.add_row(list(map(lambda k: d[k], column_names)))
return pt.get_string()
def print_dict(d, dict_property="Property", wrap=0):
pt = prettytable.PrettyTable([dict_property, 'Value'], print_empty=False)
pt.align = 'l'
for k, v in sorted(six.iteritems(d)):
# convert dict to str to check length
if isinstance(v, (list, dict)):
v = jsonutils.dumps(v)
# if value has a newline, add in multiple rows
# e.g. fault with stacktrace
if v and isinstance(v, six.string_types) and r'\n' in v:
lines = v.strip().split(r'\n')
col1 = k
for line in lines:
if wrap > 0:
line = textwrap.fill(six.text_type(line), wrap)
pt.add_row([col1, line])
col1 = ''
else:
if wrap > 0:
v = textwrap.fill(six.text_type(v), wrap)
pt.add_row([k, v])
encoded = encodeutils.safe_encode(pt.get_string())
# FIXME(gordc): https://bugs.launchpad.net/oslo-incubator/+bug/1370710
if six.PY3:
encoded = encoded.decode()
print(encoded)
def import_versioned_module(version, submodule=None):
module = 'ceilometerclient.v%s' % version
if submodule:
module = '.'.join((module, submodule))
return importutils.import_module(module)
def args_array_to_dict(kwargs, key_to_convert):
values_to_convert = kwargs.get(key_to_convert)
if values_to_convert:
try:
kwargs[key_to_convert] = dict(v.split("=", 1)
for v in values_to_convert)
except ValueError:
raise exc.CommandError(
'%s must be a list of key=value not "%s"' % (
key_to_convert, values_to_convert))
return kwargs
def args_array_to_list_of_dicts(kwargs, key_to_convert):
"""Converts ['a=1;b=2','c=3;d=4'] to [{a:1,b:2},{c:3,d:4}]."""
values_to_convert = kwargs.get(key_to_convert)
if values_to_convert:
try:
kwargs[key_to_convert] = []
for lst in values_to_convert:
pairs = lst.split(";")
dct = dict()
for pair in pairs:
kv = pair.split("=", 1)
dct[kv[0]] = kv[1].strip(" \"'") # strip spaces and quotes
kwargs[key_to_convert].append(dct)
except Exception:
raise exc.CommandError(
'%s must be a list of key1=value1;key2=value2;... not "%s"' % (
key_to_convert, values_to_convert))
return kwargs
def key_with_slash_to_nested_dict(kwargs):
nested_kwargs = {}
for k in list(kwargs):
keys = k.split('/', 1)
if len(keys) == 2:
nested_kwargs.setdefault(keys[0], {})[keys[1]] = kwargs[k]
del kwargs[k]
kwargs.update(nested_kwargs)
return kwargs
def merge_nested_dict(dest, source, depth=0):
for (key, value) in six.iteritems(source):
if isinstance(value, dict) and depth:
merge_nested_dict(dest[key], value,
depth=(depth - 1))
else:
dest[key] = value
def env(*args, **kwargs):
"""Returns the first environment variable set.
If all are empty, defaults to '' or keyword arg `default`.
"""
for arg in args:
value = os.environ.get(arg)
if value:
return value
return kwargs.get('default', '')
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