115 lines
3.3 KiB
Python
115 lines
3.3 KiB
Python
import os
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import logging
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from util.config.provider.baseprovider import (BaseProvider, import_yaml, export_yaml,
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CannotWriteConfigException)
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logger = logging.getLogger(__name__)
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def _ensure_parent_dir(filepath):
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""" Ensures that the parent directory of the given file path exists. """
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try:
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parentpath = os.path.abspath(os.path.join(filepath, os.pardir))
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if not os.path.isdir(parentpath):
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os.makedirs(parentpath)
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except IOError as ioe:
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raise CannotWriteConfigException(str(ioe))
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class FileConfigProvider(BaseProvider):
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""" Implementation of the config provider that reads the data from the file system. """
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def __init__(self, config_volume, yaml_filename, py_filename):
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self.config_volume = config_volume
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self.yaml_filename = yaml_filename
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self.py_filename = py_filename
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self.yaml_path = os.path.join(config_volume, yaml_filename)
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self.py_path = os.path.join(config_volume, py_filename)
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@property
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def provider_id(self):
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return 'file'
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def update_app_config(self, app_config):
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if os.path.exists(self.py_path):
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logger.debug('Applying config file: %s', self.py_path)
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app_config.from_pyfile(self.py_path)
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if os.path.exists(self.yaml_path):
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logger.debug('Applying config file: %s', self.yaml_path)
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import_yaml(app_config, self.yaml_path)
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def get_config(self):
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if not os.path.exists(self.yaml_path):
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return None
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config_obj = {}
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import_yaml(config_obj, self.yaml_path)
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return config_obj
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def save_config(self, config_obj):
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export_yaml(config_obj, self.yaml_path)
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def config_exists(self):
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return self.volume_file_exists(self.yaml_filename)
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def volume_exists(self):
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return os.path.exists(self.config_volume)
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def volume_file_exists(self, filename):
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return os.path.exists(os.path.join(self.config_volume, filename))
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def get_volume_file(self, filename, mode='r'):
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return open(os.path.join(self.config_volume, filename), mode=mode)
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def write_volume_file(self, filename, contents):
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filepath = os.path.join(self.config_volume, filename)
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_ensure_parent_dir(filepath)
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try:
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with open(filepath, mode='w') as f:
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f.write(contents)
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except IOError as ioe:
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raise CannotWriteConfigException(str(ioe))
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return filepath
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def remove_volume_file(self, filename):
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filepath = os.path.join(self.config_volume, filename)
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os.remove(filepath)
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def list_volume_directory(self, path):
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dirpath = os.path.join(self.config_volume, path)
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if not os.path.exists(dirpath):
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return None
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if not os.path.isdir(dirpath):
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return None
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return os.listdir(dirpath)
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def save_volume_file(self, filename, flask_file):
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filepath = os.path.join(self.config_volume, filename)
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_ensure_parent_dir(filepath)
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# Write the file.
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try:
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flask_file.save(filepath)
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except IOError as ioe:
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raise CannotWriteConfigException(str(ioe))
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return filepath
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def requires_restart(self, app_config):
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file_config = self.get_config()
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if not file_config:
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return False
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for key in file_config:
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if app_config.get(key) != file_config[key]:
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return True
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return False
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def get_volume_path(self, directory, file):
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return os.path.join(directory, file)
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