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#!/usr/bin/env python
# $Id: $
from copy import deepcopy
from syslog import LOG_ERR, syslog
from Bcfg2.Server.Generator import SingleXMLFileBacked, XMLFileBacked, DirectoryBacked
from Bcfg2.Server.Structure import Structure
from elementtree.ElementTree import Element, XML, tostring
class ImageFile(SingleXMLFileBacked):
def Index(self):
a = XML(self.data)
self.attr = a.attrib
self.entries = a.getchildren()
self.images = {}
for child in self.entries:
(name, package, service) = map(lambda x:child.attrib.get(x), ['name', 'package', 'service'])
for grandchild in child.getchildren():
self.images[grandchild.attrib['name']] = (name, package, service)
class Bundle(XMLFileBacked):
def Index(self):
x = XML(self.data)
# scan self.entries to build partial bundle fragments
self.all = []
self.systems = {}
self.attributes = {}
for entry in x.getchildren():
if entry.tag == 'System':
self.systems[entry.attrib['name']] = entry.getchildren()
elif entry.tag == 'Attribute':
self.attributes["%s.%s"%(entry.attrib['scope'], entry.attrib['name'])] = entry.getchildren()
else:
self.all.append(entry)
del self.data
def BuildBundle(self,metadata, system):
bundlename = self.name[:-4]
b = Element('Bundle', name=bundlename)
for entry in self.all + self.systems.get(system, []):
b.append(deepcopy(entry))
for attribute in metadata.attributes:
for entry in self.attributes.get(attribute, []):
b.append(deepcopy(entry))
return b
class BundleSet(DirectoryBacked):
'''The Bundler handles creation of dependent clauses based on bundle definitions'''
__child__ = Bundle
class bundler(Structure):
__name__ = 'bundler'
__version__ = '$Id$'
'''The bundler creates dependent clauses based on the bundle/translation scheme from bcfg1'''
def __init__(self, core, datastore):
Structure.__init__(self, core, datastore)
self.imageinfo = ImageFile("%s/common/imageinfo.xml"%(datastore), self.core.fam)
self.bundles = BundleSet(self.data, self.core.fam)
def Construct(self, metadata):
(system, package, service) = self.GetTransInfo(metadata)
bundleset = []
for bundlename in metadata.bundles:
if not self.bundles.entries.has_key("%s.xml"%(bundlename)):
syslog(LOG_ERR, "Client %s requested nonexistent bundle %s"%(metadata.hostname, bundlename))
continue
bundle = self.bundles.entries["%s.xml"%(bundlename)].BuildBundle(metadata, system)
# now we need to populate service/package types
for entry in bundle.getchildren():
if entry.tag == 'Package':
entry.attrib['type'] = package
elif entry.tag == 'Service':
entry.attrib['type'] = service
bundleset.append(bundle)
return bundleset
def GetTransInfo(self, metadata):
if self.imageinfo.images.has_key(metadata.image):
return self.imageinfo.images[metadata.image]
else:
raise KeyError, metadata.image
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