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import os
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
class Properties(Bcfg2.Server.Plugin.Plugin,
Bcfg2.Server.Plugin.Connector):
"""
The properties plugin maps property
files into client metadata instances.
"""
name = 'Properties'
version = '$Revision$'
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.deepcopy(self.store.entries)
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