49 lines
1.7 KiB
Python
49 lines
1.7 KiB
Python
# Copyright 2019 Cloudbase Solutions Srl
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
import jinja2
|
|
|
|
from cloudbaseinit.utils.template_engine import base_template
|
|
|
|
MISSING_JINJA_VARIABLE = u'CI_MISSING_JINJA_VAR/'
|
|
|
|
|
|
class MissingJinjaVariable(jinja2.DebugUndefined):
|
|
"""Missing Jinja2 variable class."""
|
|
|
|
def __str__(self):
|
|
return u'%s%s' % (MISSING_JINJA_VARIABLE, self._undefined_name)
|
|
|
|
|
|
class Jinja2TemplateEngine(base_template.BaseTemplateEngine):
|
|
def get_template_type(self):
|
|
return 'jinja'
|
|
|
|
def render(self, data, raw_template):
|
|
"""Renders the template using Jinja2 template engine
|
|
|
|
The data variable is a dict which contains the key-values
|
|
that will be used to render the template.
|
|
|
|
The template is an encoded string which can contain special
|
|
constructions that will be used by the template engine.
|
|
|
|
The return value will be an encoded string.
|
|
"""
|
|
|
|
template = self.remove_template_definition(raw_template).decode()
|
|
jinja_template = jinja2.Template(template,
|
|
trim_blocks=True,
|
|
undefined=MissingJinjaVariable,)
|
|
return jinja_template.render(**data).encode()
|