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# Copyright 2013: Mirantis Inc.
# 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.
# yardstick comment: this is a modified copy of rally/rally/common/utils.py
from __future__ import absolute_import
from __future__ import print_function
import errno
import logging
import os
import subprocess
import sys
from functools import reduce
import yaml
from six.moves import configparser
from oslo_utils import importutils
from oslo_serialization import jsonutils
import yardstick
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)
# Decorator for cli-args
def cliargs(*args, **kwargs):
def _decorator(func):
func.__dict__.setdefault('arguments', []).insert(0, (args, kwargs))
return func
return _decorator
def itersubclasses(cls, _seen=None):
"""Generator over all subclasses of a given class in depth first order."""
if not isinstance(cls, type):
raise TypeError("itersubclasses must be called with "
"new-style classes, not %.100r" % cls)
_seen = _seen or set()
try:
subs = cls.__subclasses__()
except TypeError: # fails only when cls is type
subs = cls.__subclasses__(cls)
for sub in subs:
if sub not in _seen:
_seen.add(sub)
yield sub
for sub in itersubclasses(sub, _seen):
yield sub
def try_append_module(name, modules):
if name not in modules:
modules[name] = importutils.import_module(name)
def import_modules_from_package(package):
"""Import modules from package and append into sys.modules
:param: package - Full package name. For example: rally.deploy.engines
"""
path = [os.path.dirname(yardstick.__file__), ".."] + package.split(".")
path = os.path.join(*path)
for root, dirs, files in os.walk(path):
for filename in files:
if filename.startswith("__") or not filename.endswith(".py"):
continue
new_package = ".".join(root.split(os.sep)).split("....")[1]
module_name = "%s.%s" % (new_package, filename[:-3])
try_append_module(module_name, sys.modules)
def parse_yaml(file_path):
try:
with open(file_path) as f:
value = yaml.safe_load(f)
except IOError:
return {}
except OSError as e:
if e.errno != errno.EEXIST:
raise
else:
return value
def get_param(key, default=''):
conf_file = os.environ.get('CONF_FILE', '/etc/yardstick/yardstick.yaml')
conf = parse_yaml(conf_file)
try:
return reduce(lambda a, b: a[b], key.split('.'), conf)
except KeyError:
if not default:
raise
return default
def makedirs(d):
try:
os.makedirs(d)
except OSError as e:
if e.errno != errno.EEXIST:
raise
def execute_command(cmd):
exec_msg = "Executing command: '%s'" % cmd
logger.debug(exec_msg)
output = subprocess.check_output(cmd.split()).split(os.linesep)
return output
def source_env(env_file):
p = subprocess.Popen(". %s; env" % env_file, stdout=subprocess.PIPE,
shell=True)
output = p.communicate()[0]
env = dict((line.split('=', 1) for line in output.splitlines()))
os.environ.update(env)
return env
def read_json_from_file(path):
with open(path, 'r') as f:
j = f.read()
# don't use jsonutils.load() it conflicts with already decoded input
return jsonutils.loads(j)
def write_json_to_file(path, data, mode='w'):
with open(path, mode) as f:
jsonutils.dump(data, f)
def write_file(path, data, mode='w'):
with open(path, mode) as f:
f.write(data)
def parse_ini_file(path):
parser = configparser.ConfigParser()
parser.read(path)
try:
default = {k: v for k, v in parser.items('DEFAULT')}
except configparser.NoSectionError:
default = {}
config = dict(DEFAULT=default,
**{s: {k: v for k, v in parser.items(
s)} for s in parser.sections()})
return config
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