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"""This generator provides rule-based entry mappings."""
import re
import Bcfg2.Options
import Bcfg2.Server.Plugin
class Rules(Bcfg2.Server.Plugin.PrioDir):
"""This is a generator that handles service assignments."""
__author__ = 'bcfg-dev@mcs.anl.gov'
options = Bcfg2.Server.Plugin.PrioDir.options + [
Bcfg2.Options.BooleanOption(
cf=("rules", "regex"), dest="rules_regex",
help="Allow regular expressions in Rules")]
def __init__(self, core):
Bcfg2.Server.Plugin.PrioDir.__init__(self, core)
self._regex_cache = dict()
def HandlesEntry(self, entry, metadata):
for src in self.entries.values():
for candidate in src.XMLMatch(metadata).xpath("//%s" % entry.tag):
if self._matches(entry, metadata, candidate):
return True
return False
HandleEntry = Bcfg2.Server.Plugin.PrioDir.BindEntry
def _matches(self, entry, metadata, candidate):
if Bcfg2.Server.Plugin.PrioDir._matches(self, entry, metadata,
candidate):
return True
elif (entry.tag == "Path" and
entry.get('name').rstrip("/") ==
candidate.get("name").rstrip("/")):
# special case for Path tags:
# http://trac.mcs.anl.gov/projects/bcfg2/ticket/967
return True
elif self._regex_enabled:
# attempt regular expression matching
rule = candidate.get("name")
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
@property
def _regex_enabled(self):
""" Return True if rules regexes are enabled, False otherwise """
return Bcfg2.Options.setup.rules_regex
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