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import copy
import lxml.etree
import Bcfg2.Server.Plugin
class PropertyFile(Bcfg2.Server.Plugin.StructFile):
"""Class for properties files."""
def Index(self):
"""Build internal data structures."""
if type(self.data) is not lxml.etree._Element:
try:
self.data = lxml.etree.XML(self.data)
except lxml.etree.XMLSyntaxError:
Bcfg2.Server.Plugin.logger.error("Failed to parse %s" %
self.name)
self.fragments = {}
work = {lambda x: True: self.data.getchildren()}
while work:
(predicate, worklist) = work.popitem()
self.fragments[predicate] = \
[item for item in worklist
if (item.tag != 'Group' and
item.tag != 'Client' and
not isinstance(item,
lxml.etree._Comment))]
for item in worklist:
cmd = None
if item.tag == 'Group':
if item.get('negate', 'false').lower() == 'true':
cmd = "lambda x:'%s' not in x.groups and predicate(x)"
else:
cmd = "lambda x:'%s' in x.groups and predicate(x)"
elif item.tag == 'Client':
if item.get('negate', 'false').lower() == 'true':
cmd = "lambda x:x.hostname != '%s' and predicate(x)"
else:
cmd = "lambda x:x.hostname == '%s' and predicate(x)"
# else, ignore item
if cmd is not None:
newpred = eval(cmd % item.get('name'),
{'predicate':predicate})
work[newpred] = item.getchildren()
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]
Bcfg2.Server.Plugin.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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