1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
"""This generator provides rule-based entry mappings."""
import copy
import re
import string
import Bcfg2.Options
import Bcfg2.Server.Plugin
class NameTemplate(string.Template):
"""Simple subclass of string.Template with a custom delimiter."""
delimiter = '%'
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"),
Bcfg2.Options.BooleanOption(
cf=("rules", "replace_name"), dest="rules_replace_name",
help="Replace %{name} in attributes with name of target entry")]
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
def _apply(self, entry, data):
if self._replace_name_enabled:
data = copy.deepcopy(data)
for key, val in list(data.attrib.items()):
data.attrib[key] = NameTemplate(val).safe_substitute(
name=entry.get('name'))
Bcfg2.Server.Plugin.PrioDir._apply(self, entry, data)
@property
def _regex_enabled(self):
""" Return True if rules regexes are enabled, False otherwise """
return Bcfg2.Options.setup.rules_regex
@property
def _replace_name_enabled(self):
""" Return True if the replace_name feature is enabled,
False otherwise """
return Bcfg2.Options.setup.rules_replace_name
|
