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'''This module implements a templating generator based on Genshi'''
__revision__ = '$Revision$'
from genshi.template import TemplateLoader, TextTemplate, MarkupTemplate, TemplateError
import logging
import Bcfg2.Server.Plugin
import genshi.core, genshi.input
logger = logging.getLogger('Bcfg2.Plugins.TGenshi')
def removecomment(stream):
"""A genshi filter that removes comments from the stream."""
for kind, data, pos in stream:
if kind is genshi.core.COMMENT:
continue
yield kind, data, pos
class TemplateFile:
'''Template file creates Genshi template structures for the loaded file'''
def __init__(self, name, properties, specific):
self.name = name
self.properties = properties
self.specific = specific
if self.specific.all:
matchname = self.name
elif self.specific.group:
matchname = self.name[:self.name.find('.G')]
else:
matchname = self.name[:self.name.find('.H')]
if matchname.endswith('.txt'):
self.template_cls = TextTemplate
else:
self.template_cls = MarkupTemplate
def handle_event(self, event):
'''Handle all fs events for this template'''
if event.code2str() == 'deleted':
return
try:
loader = TemplateLoader()
self.template = loader.load(self.name, cls=self.template_cls)
except TemplateError, terror:
logger.error('Genshi template error: %s' % terror)
except genshi.input.ParseError, perror:
logger.error('Genshi parse error: %s' % perror)
def bind_entry(self, entry, metadata):
'''Build literal file information'''
fname = entry.get('realname', entry.get('name'))
try:
stream = self.template.generate( \
name=fname, metadata=metadata, path=self.name,
properties=self.properties).filter(removecomment)
if isinstance(self.template, TextTemplate):
entry.text = stream.render('text')
else:
entry.text = stream.render('xml')
except TemplateError, terror:
logger.error('Genshi template error: %s' % terror)
raise Bcfg2.Server.Plugin.PluginExecutionError
class TGenshi(Bcfg2.Server.Plugin.GroupSpool):
'''The TGenshi generator implements a templating mechanism for configuration files'''
__name__ = 'TGenshi'
__version__ = '$Id$'
__author__ = 'jeff@ocjtech.us'
use_props = True
filename_pattern = 'template\.(txt|xml)'
es_child_cls = TemplateFile
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