# -*- coding: utf-8 -*- import ConfigParser import os from slapos.cli.command import Command class ConfigError(Exception): pass class ConfigCommand(Command): "Base class for commands that require a configuration file" log = None default_config_var = 'SLAPOS_CONFIGURATION' # use this if default_config_var does not exist default_config_path = '/etc/opt/slapos/slapos.cfg' def get_parser(self, prog_name): ap = super(ConfigCommand, self).get_parser(prog_name) ap.add_argument('--cfg', help='SlapOS configuration file' ' (default: $%s or %s)' % (self.default_config_var, self.default_config_path)) return ap def fetch_config(self, args): """ Returns a configuration object if file exists/readable/valid, will raise an error otherwise. The exception may come from the configparser itself if the configuration content is very broken, and will clearly show what is wrong with the file. """ if args.cfg: cfg_path = args.cfg else: cfg_path = os.environ.get(self.default_config_var, self.default_config_path) cfg_path = os.path.expanduser(cfg_path) self.log.debug('Loading config: %s' % cfg_path) if not os.path.exists(cfg_path): raise ConfigError('Configuration file does not exist: %s' % cfg_path) configp = ConfigParser.SafeConfigParser() if configp.read(cfg_path) != [cfg_path]: # bad permission, etc. raise ConfigError('Cannot parse configuration file: %s' % cfg_path) return configp class ClientConfigCommand(ConfigCommand): default_config_var = 'SLAPOS_CLIENT_CONFIGURATION' default_config_path = '~/.slapos/slapos-client.cfg'