/usr/lib/python2.7/dist-packages/Bcfg2/Server/Plugins/Pkgmgr.py is in bcfg2-server 1.4.0~pre2+git141-g6d40dace6358-1.
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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 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 | '''This module implements a package management scheme for all images'''
import re
import sys
import logging
import lxml.etree
import Bcfg2.Server.Plugin
from Bcfg2.Server.Plugin import PluginExecutionError
logger = logging.getLogger('Bcfg2.Plugins.Pkgmgr')
class FuzzyDict(dict):
fuzzy = re.compile(r'(?P<name>.*):(?P<alist>\S+(,\S+)*)')
def __getitem__(self, key):
if isinstance(key, str):
mdata = self.fuzzy.match(key)
if mdata:
return dict.__getitem__(self, mdata.groupdict()['name'])
else:
print("got non-string key %s" % str(key))
return dict.__getitem__(self, key)
def __contains__(self, key):
if isinstance(key, str):
mdata = self.fuzzy.match(key)
if mdata:
return dict.__contains__(self, mdata.groupdict()['name'])
else:
print("got non-string key %s" % str(key))
return dict.__contains__(self, key)
def get(self, key, default=None):
try:
return self.__getitem__(key)
except KeyError:
if default:
return default
raise
class PNode(object):
"""PNode has a list of packages available at a
particular group intersection.
"""
splitters = dict(
rpm=re.compile(
r'^(.*/)?(?P<name>[\w\+\d\.]+(-[\w\+\d\.]+)*)-' +
r'(?P<version>[\w\d\.]+-([\w\d\.]+))\.(?P<arch>\S+)\.rpm$'),
encap=re.compile(
r'^(?P<name>[\w-]+)-(?P<version>[\w\d\.+-]+).encap.*$'))
raw = dict(
Client="lambda m, e:'%(name)s' == m.hostname and predicate(m, e)",
Group="lambda m, e:'%(name)s' in m.groups and predicate(m, e)")
nraw = dict(
Client="lambda m, e:'%(name)s' != m.hostname and predicate(m, e)",
Group="lambda m, e:'%(name)s' not in m.groups and predicate(m, e)")
containers = ['Group', 'Client']
ignore = ['Package']
def __init__(self, data, pdict, parent=None):
# copy local attributes to all child nodes if no local attribute exists
if 'Package' not in pdict:
pdict['Package'] = set()
for child in data.getchildren():
attrs = set(data.attrib.keys()).difference(
child.attrib.keys() + ['name'])
for attr in attrs:
try:
child.set(attr, data.get(attr))
except:
# don't fail on things like comments and other
# immutable elements
pass
self.data = data
self.contents = {}
if parent is None:
self.predicate = lambda m, e: True
else:
predicate = parent.predicate
if data.get('negate', 'false').lower() == 'true':
psrc = self.nraw
else:
psrc = self.raw
if data.tag in list(psrc.keys()):
self.predicate = eval(psrc[data.tag] %
{'name': data.get('name')},
{'predicate': predicate})
else:
raise PluginExecutionError("Unknown tag: %s" % data.tag)
self.children = []
self._load_children(data, pdict)
if 'Package' not in self.contents:
self.contents['Package'] = FuzzyDict()
for pkg in data.findall('./Package'):
if ('name' in pkg.attrib and
pkg.get('name') not in pdict['Package']):
pdict['Package'].add(pkg.get('name'))
if pkg.get('name') is not None:
self.contents['Package'][pkg.get('name')] = {}
if pkg.getchildren():
self.contents['Package'][pkg.get('name')]['__children__'] \
= pkg.getchildren()
if 'simplefile' in pkg.attrib:
pkg.set('url',
"%s/%s" % (pkg.get('uri'), pkg.get('simplefile')))
self.contents['Package'][pkg.get('name')].update(pkg.attrib)
else:
if 'file' in pkg.attrib:
if 'multiarch' in pkg.attrib:
archs = pkg.get('multiarch').split()
srcs = pkg.get('srcs', pkg.get('multiarch')).split()
url = ' '.join(
["%s/%s" % (pkg.get('uri'),
pkg.get('file') % {'src': srcs[idx],
'arch': archs[idx]})
for idx in range(len(archs))])
pkg.set('url', url)
else:
pkg.set('url', '%s/%s' % (pkg.get('uri'),
pkg.get('file')))
if (pkg.get('type') in self.splitters and
pkg.get('file') is not None):
mdata = \
self.splitters[pkg.get('type')].match(pkg.get('file'))
if not mdata:
logger.error("Failed to match pkg %s" %
pkg.get('file'))
continue
pkgname = mdata.group('name')
self.contents['Package'][pkgname] = mdata.groupdict()
self.contents['Package'][pkgname].update(pkg.attrib)
if pkg.attrib.get('file'):
self.contents['Package'][pkgname]['url'] = \
pkg.get('url')
self.contents['Package'][pkgname]['type'] = \
pkg.get('type')
if pkg.get('verify'):
self.contents['Package'][pkgname]['verify'] = \
pkg.get('verify')
if pkg.get('multiarch'):
self.contents['Package'][pkgname]['multiarch'] = \
pkg.get('multiarch')
if pkgname not in pdict['Package']:
pdict['Package'].add(pkgname)
if pkg.getchildren():
self.contents['Package'][pkgname]['__children__'] = \
pkg.getchildren()
else:
self.contents['Package'][pkg.get('name')].update(
pkg.attrib)
def _load_children(self, data, idict):
""" load children """
for item in data.getchildren():
if item.tag in self.ignore:
continue
elif item.tag in self.containers:
self.children.append(self.__class__(item, idict, self))
else:
try:
self.contents[item.tag][item.get('name')] = \
dict(item.attrib)
except KeyError:
self.contents[item.tag] = \
{item.get('name'): dict(item.attrib)}
if item.text:
self.contents[item.tag][item.get('name')]['__text__'] = \
item.text
if item.getchildren():
self.contents[item.tag][item.get('name')]['__children__'] \
= item.getchildren()
try:
idict[item.tag].append(item.get('name'))
except KeyError:
idict[item.tag] = [item.get('name')]
def Match(self, metadata, data, entry=lxml.etree.Element("None")):
"""Return a dictionary of package mappings."""
if self.predicate(metadata, entry):
for key in self.contents:
data.setdefault(key, FuzzyDict).update(self.contents[key])
for child in self.children:
child.Match(metadata, data)
class PkgSrc(Bcfg2.Server.Plugin.XMLFileBacked):
""" XMLSrc files contain a
:class:`Bcfg2.Server.Plugin.helpers.INode` hierarchy that returns
matching entries. XMLSrc objects are deprecated and
:class:`Bcfg2.Server.Plugin.helpers.StructFile` should be
preferred where possible."""
__node__ = PNode
__cacheobj__ = FuzzyDict
__priority_required__ = True
def __init__(self, filename, should_monitor=False):
Bcfg2.Server.Plugin.XMLFileBacked.__init__(self, filename,
should_monitor)
self.items = {}
self.cache = None
self.pnode = None
self.priority = -1
def HandleEvent(self, _=None):
"""Read file upon update."""
try:
data = open(self.name).read()
except IOError:
msg = "Failed to read file %s: %s" % (self.name, sys.exc_info()[1])
logger.error(msg)
raise PluginExecutionError(msg)
self.items = {}
try:
xdata = lxml.etree.XML(data, parser=Bcfg2.Server.XMLParser)
except lxml.etree.XMLSyntaxError:
msg = "Failed to parse file %s: %s" % (self.name,
sys.exc_info()[1])
logger.error(msg)
raise PluginExecutionError(msg)
self.pnode = self.__node__(xdata, self.items)
self.cache = None
try:
self.priority = int(xdata.get('priority'))
except (ValueError, TypeError):
if self.__priority_required__:
msg = "Got bogus priority %s for file %s" % \
(xdata.get('priority'), self.name)
logger.error(msg)
raise PluginExecutionError(msg)
del xdata, data
def Cache(self, metadata):
"""Build a package dict for a given host."""
if self.cache is None or self.cache[0] != metadata:
cache = (metadata, self.__cacheobj__())
if self.pnode is None:
logger.error("Cache method called early for %s; "
"forcing data load" % self.name)
self.HandleEvent()
return
self.pnode.Match(metadata, cache[1])
self.cache = cache
def __str__(self):
return str(self.items)
class Pkgmgr(Bcfg2.Server.Plugin.PrioDir):
"""This is a generator that handles package assignments."""
name = 'Pkgmgr'
__author__ = 'bcfg-dev@mcs.anl.gov'
__child__ = PkgSrc
__element__ = 'Package'
def HandleEvent(self, event):
'''Handle events and update dispatch table'''
Bcfg2.Server.Plugin.XMLDirectoryBacked.HandleEvent(self, event)
for src in list(self.entries.values()):
for itype, children in list(src.items.items()):
for child in children:
try:
self.Entries[itype][child] = self.BindEntry
except KeyError:
self.Entries[itype] = FuzzyDict([(child,
self.BindEntry)])
def BindEntry(self, entry, metadata):
"""Bind data for entry, and remove instances that are not requested."""
pname = entry.get('name')
Bcfg2.Server.Plugin.PrioDir.BindEntry(self, entry, metadata)
if entry.findall('Instance'):
mdata = FuzzyDict.fuzzy.match(pname)
if mdata:
arches = mdata.group('alist').split(',')
for inst in entry.findall('Instance'):
if inst.get('arch') not in arches:
entry.remove(inst)
def HandlesEntry(self, entry, metadata):
return (
entry.tag == 'Package' and
entry.get('name').split(':')[0] in self.Entries['Package'].keys())
def HandleEntry(self, entry, metadata):
self.BindEntry(entry, metadata)
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