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# 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 os
from jinja2 import Template
from ... import __version__ as version
from ..loading import LiteralLocation, LiteralLoader
from .reader import Reader
from .exceptions import ReaderSyntaxError
# TODO: we could put a lot of other useful stuff here.
CONTEXT = {
'ARIA_VERSION': version,
'ENV': os.environ}
class JinjaReader(Reader):
"""
ARIA Jinja reader.
Forwards the rendered result to a new reader in the reader source.
"""
def read(self):
data = self.load()
try:
data = str(data)
template = Template(data)
literal = template.render(CONTEXT)
# TODO: might be useful to write the literal result to a file for debugging
location = self.location
if isinstance(location, basestring) and location.endswith('.jinja'):
# Use reader based on the location with the ".jinja" prefix stripped off
location = location[:-6]
next_reader = self.context.reading.reader_source.get_reader(
self.context, LiteralLocation(literal, name=location), LiteralLoader(literal))
else:
# Use reader for literal loader
next_reader = self.context.reading.reader_source.get_reader(
self.context, LiteralLocation(literal), LiteralLoader(literal))
return next_reader.read()
except Exception as e:
raise ReaderSyntaxError('Jinja: %s' % e, cause=e)
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