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'''This module implements a package management scheme for all images'''
__revision__ = '$Revision$'
import logging
import re
import Bcfg2.Server.Plugin
import lxml
try:
set
except NameError:
from sets import Set as set
logger = logging.getLogger('Bcfg2.Plugins.Pkgmgr')
class FuzzyDict(dict):
fuzzy = re.compile('(?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:
if default:
return default
raise
class PNode(Bcfg2.Server.Plugin.INode):
"""PNode has a list of packages available at a
particular group intersection.
"""
splitters = {'rpm': re.compile('^(.*/)?(?P<name>[\w\+\d\.]+(-[\w\+\d\.]+)*)-' + \
'(?P<version>[\w\d\.]+-([\w\d\.]+))\.(?P<arch>\S+)\.rpm$'),
'encap': re.compile('^(?P<name>[\w-]+)-(?P<version>[\w\d\.+-]+).encap.*$')}
ignore = ['Package']
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:
try:
data[key].update(self.contents[key])
except:
data[key] = FuzzyDict()
data[key].update(self.contents[key])
for child in self.children:
child.Match(metadata, data)
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
Bcfg2.Server.Plugin.INode.__init__(self, data, pdict, parent)
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') != 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') != 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)
class PkgSrc(Bcfg2.Server.Plugin.XMLSrc):
"""PkgSrc files contain a PNode hierarchy that
returns matching package entries.
"""
__node__ = PNode
__cacheobj__ = FuzzyDict
class Pkgmgr(Bcfg2.Server.Plugin.PrioDir):
"""This is a generator that handles package assignments."""
name = 'Pkgmgr'
__version__ = '$Id$'
__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(',')
[entry.remove(inst) for inst in \
entry.findall('Instance') \
if inst.get('arch') not in arches]
def HandlesEntry(self, entry, metadata):
return entry.tag == 'Package' and entry.get('name').split(':')[0] in list(self.Entries['Package'].keys())
def HandleEntry(self, entry, metadata):
self.BindEntry(entry, metadata)
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