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'''This module implements a templating generator based on Genshi'''
__revision__ = '$Revision$'
import Bcfg2.Server.Plugin, Bcfg2.Server.Plugins.TGenshi
import lxml.etree, logging
import genshi.template
logger = logging.getLogger('Bcfg2.Plugins.SGenshi')
class SGenshiTemplateFile(Bcfg2.Server.Plugins.TGenshi.TemplateFile):
def get_xml_value(self, metadata):
stream = self.template.generate(metadata=metadata,
properties=self.properties.properties).filter( \
Bcfg2.Server.Plugins.TGenshi.removecomment)
data = stream.render('xml')
return lxml.etree.XML(data)
class SGenshiEntrySet(Bcfg2.Server.Plugin.EntrySet):
def __init__(self, path, fam):
fpattern = '\S+\.xml'
try:
properties = Bcfg2.Server.Plugin.TemplateProperties( \
'%s/../etc/properties.xml' % (path), fam)
except:
properties = Bcfg2.Server.Plugin.FakeProperties()
Bcfg2.Server.Plugin.EntrySet.__init__(self, fpattern, path,
properties, SGenshiTemplateFile)
fam.AddMonitor(path, self)
def HandleEvent(self, event):
'''passthrough event handler for old calling convention'''
if event.filename != self.path:
return self.handle_event(event)
def BuildStructures(self, metadata):
'''Build SGenshi structures'''
ret = []
for entry in self.get_matching(metadata):
try:
ret.append(entry.get_xml_value(metadata))
except genshi.template.TemplateError, terror:
logger.error('Genshi template error: %s' % terror)
logger.error("SGenshi: Failed to template file %s" % entry.name)
return ret
class SGenshi(SGenshiEntrySet, Bcfg2.Server.Plugin.StructurePlugin):
'''The SGenshi plugin provides templated structures'''
__name__ = 'SGenshi'
__version__ = '$Id$'
__author__ = 'bcfg-dev@mcs.anl.gov'
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
try:
SGenshiEntrySet.__init__(self, self.data, self.core.fam)
except:
logger.error("Failed to load SGenshi repository; disabling SGenshi")
raise Bcfg2.Server.Plugin.PluginInitError
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