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""" The CfgJinja2Generator allows you to use the `Jinja2
<http://jinja.pocoo.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 jinja2 import Template
HAS_JINJA2 = True
except ImportError:
HAS_JINJA2 = False
class DefaultJinja2DataProvider(DefaultTemplateDataProvider):
""" Template data provider for Jinja2 templates. Jinja2 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 CfgJinja2Generator(CfgGenerator):
""" The CfgJinja2Generator allows you to use the `Jinja2
<http://jinja.pocoo.org/>`_ templating system to generate
:ref:`server-plugins-generators-cfg` files. """
#: Handle .jinja2 files
__extensions__ = ['jinja2']
#: Low priority to avoid matching host- or group-specific
#: .crypt.jinja2 files
__priority__ = 50
def __init__(self, fname, spec):
CfgGenerator.__init__(self, fname, spec)
if not HAS_JINJA2:
raise PluginExecutionError("Jinja2 is not available")
__init__.__doc__ = CfgGenerator.__init__.__doc__
def get_data(self, entry, metadata):
template = Template(self.data.decode(Bcfg2.Options.setup.encoding))
return template.render(
get_template_data(entry, metadata, self.name,
default=DefaultJinja2DataProvider()))
get_data.__doc__ = CfgGenerator.get_data.__doc__
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