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"""This generator provides rule-based entry mappings."""
import re
import Bcfg2.Server.Plugin
class Rules(Bcfg2.Server.Plugin.PrioDir):
"""This is a generator that handles service assignments."""
name = 'Rules'
__author__ = 'bcfg-dev@mcs.anl.gov'
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.PrioDir.__init__(self, core, datastore)
self._regex_cache = dict()
def HandlesEntry(self, entry, metadata):
if entry.tag in self.Entries:
return self._matches(entry, metadata,
self.Entries[entry.tag].keys())
return False
def HandleEntry(self, entry, metadata):
return self.BindEntry(entry, metadata)
def BindEntry(self, entry, metadata):
attrs = self.get_attrs(entry, metadata)
for key, val in list(attrs.items()):
if key not in entry.attrib:
entry.attrib[key] = val
def _matches(self, entry, metadata, rules):
if Bcfg2.Server.Plugin.PrioDir._matches(self, entry, metadata, rules):
return True
elif (entry.tag == "Path" and
((entry.get('name').endswith("/") and
entry.get('name').rstrip("/") in rules) or
(not entry.get('name').endswith("/") and
entry.get('name') + '/' in rules))):
# special case for Path tags:
# http://trac.mcs.anl.gov/projects/bcfg2/ticket/967
return True
elif self._regex_enabled:
# attempt regular expression matching
for rule in rules:
if rule not in self._regex_cache:
self._regex_cache[rule] = re.compile("%s$" % rule)
if self._regex_cache[rule].match(entry.get('name')):
return True
return False
def _regex_enabled(self):
""" Return True if rules regexes are enabled, False otherwise """
return self.core.setup.cfp.getboolean("rules", "regex", default=False)
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