import os import re import sys import copy import logging import lxml.etree import Bcfg2.Server.Plugin logger = logging.getLogger('Bcfg2.Plugins.Properties') class PropertyFile(Bcfg2.Server.Plugin.StructFile): """Class for properties files.""" def write(self): """ Write the data in this data structure back to the property file """ if self.validate_data(): try: open(self.name, "wb").write(lxml.etree.tostring(self.xdata, pretty_print=True)) return True except IOError: err = sys.exc_info()[1] logger.error("Failed to write %s: %s" % (self.name, err)) return False else: return False def validate_data(self): """ ensure that the data in this object validates against the XML schema for this property file (if a schema exists) """ schemafile = self.name.replace(".xml", ".xsd") if os.path.exists(schemafile): try: schema = lxml.etree.XMLSchema(file=schemafile) except: logger.error("Failed to process schema for %s" % self.name) return False else: # no schema exists return True if not schema.validate(self.xdata): logger.error("Data for %s fails to validate; run bcfg2-lint for " "more details" % self.name) return False else: return True class PropDirectoryBacked(Bcfg2.Server.Plugin.DirectoryBacked): __child__ = PropertyFile patterns = re.compile(r'.*\.xml$') class Properties(Bcfg2.Server.Plugin.Plugin, Bcfg2.Server.Plugin.Connector): """ The properties plugin maps property files into client metadata instances. """ name = 'Properties' def __init__(self, core, datastore): Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore) Bcfg2.Server.Plugin.Connector.__init__(self) try: self.store = PropDirectoryBacked(self.data, core.fam) except OSError: e = sys.exc_info()[1] self.logger.error("Error while creating Properties store: %s %s" % (e.strerror, e.filename)) raise Bcfg2.Server.Plugin.PluginInitError def get_additional_data(self, _): return copy.copy(self.store.entries)