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# Copyright 2015 Hewlett-Packard Development Company, L.P.
# Copyright 2016 Red Hat, Inc.
#
# 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.
"""Generate a sample policy file."""
import os
from oslo_config import cfg
from sphinx.util import logging
from oslo_policy import generator
LOG = logging.getLogger(__name__)
def generate_sample(app):
"""Generate a sample policy file."""
if not app.config.policy_generator_config_file:
LOG.warning("No policy_generator_config_file is specified, "
"skipping sample policy generation")
return
if isinstance(app.config.policy_generator_config_file, list):
for config_file, base_name in app.config.policy_generator_config_file:
if base_name is None:
base_name = _get_default_basename(config_file)
_generate_sample(app, config_file, base_name,
app.config.exclude_deprecated)
else:
_generate_sample(app,
app.config.policy_generator_config_file,
app.config.sample_policy_basename,
app.config.exclude_deprecated)
def _get_default_basename(config_file):
return os.path.splitext(os.path.basename(config_file))[0]
def _generate_sample(app, policy_file, base_name, exclude_deprecated):
def info(msg):
LOG.info('[%s] %s' % (__name__, msg))
# If we are given a file that isn't an absolute path, look for it
# in the source directory if it doesn't exist.
candidates = [
policy_file,
os.path.join(app.srcdir, policy_file,),
]
for c in candidates:
if os.path.isfile(c):
info('reading config generator instructions from %s' % c)
config_path = c
break
else:
raise ValueError(
"Could not find policy_generator_config_file %r" %
app.config.policy_generator_config_file)
if base_name:
out_file = os.path.join(app.srcdir, base_name) + '.policy.yaml.sample'
if not os.path.isdir(os.path.dirname(os.path.abspath(out_file))):
os.mkdir(os.path.dirname(os.path.abspath(out_file)))
else:
file_name = 'sample.policy.yaml'
out_file = os.path.join(app.srcdir, file_name)
info('writing sample policy to %s' % out_file)
# NOTE(bnemec): We don't want to do cli parsing on the global object here
# because that can break consumers who do cli arg registration on import
# in their documented modules. It's not allowed to register a cli arg after
# the args have been parsed once.
conf = cfg.ConfigOpts()
arguments = ['--config-file', config_path,
'--output-file', out_file]
if exclude_deprecated:
arguments += ['--exclude-deprecated']
generator.generate_sample(
args=arguments,
conf=conf)
def setup(app):
app.add_config_value('policy_generator_config_file', None, 'env')
app.add_config_value('sample_policy_basename', None, 'env')
app.add_config_value('exclude_deprecated', False, 'env')
app.connect('builder-inited', generate_sample)
return {
'parallel_read_safe': True,
'parallel_write_safe': True,
}
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