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""" The CfgCheetahGenerator allows you to use the `Cheetah
<http://www.cheetahtemplate.org/>`_ templating system to generate
:ref:`server-plugins-generators-cfg` files. """
import Bcfg2.Options
from Bcfg2.Server.Plugin import PluginExecutionError, \
DefaultTemplateDataProvider, get_template_data
from Bcfg2.Server.Plugins.Cfg import CfgGenerator
try:
from Cheetah.Template import Template
HAS_CHEETAH = True
except ImportError:
HAS_CHEETAH = False
class DefaultCheetahDataProvider(DefaultTemplateDataProvider):
""" Template data provider for Cheetah templates. Cheetah and
Genshi currently differ over the value of the ``path`` variable,
which is why this is necessary. """
def get_template_data(self, entry, metadata, template):
rv = DefaultTemplateDataProvider.get_template_data(self, entry,
metadata, template)
rv['path'] = rv['name']
return rv
class CfgCheetahGenerator(CfgGenerator):
""" The CfgCheetahGenerator allows you to use the `Cheetah
<http://www.cheetahtemplate.org/>`_ templating system to generate
:ref:`server-plugins-generators-cfg` files. """
#: Handle .cheetah files
__extensions__ = ['cheetah']
#: Low priority to avoid matching host- or group-specific
#: .crypt.cheetah files
__priority__ = 50
#: :class:`Cheetah.Template.Template` compiler settings
settings = dict(useStackFrames=False)
def __init__(self, fname, spec):
CfgGenerator.__init__(self, fname, spec)
if not HAS_CHEETAH:
raise PluginExecutionError("Cheetah is not available")
__init__.__doc__ = CfgGenerator.__init__.__doc__
def get_data(self, entry, metadata):
template = Template(self.data.decode(Bcfg2.Options.setup.encoding),
compilerSettings=self.settings)
for key, val in get_template_data(
entry, metadata, self.name,
default=DefaultCheetahDataProvider()).items():
setattr(template, key, val)
return template.respond()
get_data.__doc__ = CfgGenerator.get_data.__doc__
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