95 lines
3.6 KiB
Python
95 lines
3.6 KiB
Python
# Copyright 2015 Red Hat, Inc.
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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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import collections
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import json
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import os
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import yaml
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from oslo_log import log
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from tripleo_common.image.exception import ImageSpecificationException
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class BaseImageManager(object):
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logger = log.getLogger(__name__ + '.BaseImageManager')
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APPEND_ATTRIBUTES = ['elements', 'options', 'packages']
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CONFIG_SECTIONS = (
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DISK_IMAGES, UPLOADS, CONTAINER_IMAGES,
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CONTAINER_IMAGES_TEMPLATE
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) = (
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'disk_images', 'uploads', 'container_images',
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'container_images_template'
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)
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def __init__(self, config_files, images=None):
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self.config_files = config_files
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self.images = images
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def _extend_or_set_attribute(self, existing_image, image, attribute_name):
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attribute = image.get(attribute_name)
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if attribute:
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try:
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existing_image[attribute_name].update(attribute)
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except AttributeError:
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existing_image[attribute_name].extend(attribute)
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except KeyError:
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existing_image[attribute_name] = attribute
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def load_config_files(self, section):
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config_data = collections.OrderedDict()
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for config_file in self.config_files:
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if os.path.isfile(config_file):
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with open(config_file) as cf:
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data = yaml.safe_load(cf.read()).get(section)
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if not data:
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return None
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self.logger.debug('%s JSON: %s' % (section, str(data)))
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for item in data:
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image_name = item.get('imagename')
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if image_name is None:
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msg = 'imagename is required'
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self.logger.error(msg)
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raise ImageSpecificationException(msg)
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if self.images is not None and \
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image_name not in self.images:
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self.logger.debug('Image %s ignored' % image_name)
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continue
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existing_image = config_data.get(image_name)
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if not existing_image:
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config_data[image_name] = item
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continue
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for attr in self.APPEND_ATTRIBUTES:
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self._extend_or_set_attribute(existing_image, item,
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attr)
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# If a new key is introduced, add it.
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for key, value in item.items():
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if key not in existing_image:
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existing_image[key] = item[key]
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config_data[image_name] = existing_image
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else:
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self.logger.error('No config file exists at: %s' % config_file)
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raise IOError('No config file exists at: %s' % config_file)
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return [x for x in config_data.values()]
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def json_output(self):
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self.logger.info('Using config files: %s' % self.config_files)
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disk_images = self.load_config_files(self.DISK_IMAGES)
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print(json.dumps(disk_images))
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