/usr/lib/python2.7/dist-packages/cookiecutter/environment.py is in python-cookiecutter 1.6.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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"""Jinja2 environment and extensions loading."""
from jinja2 import Environment, StrictUndefined
from .exceptions import UnknownExtension
class ExtensionLoaderMixin(object):
"""Mixin providing sane loading of extensions specified in a given context.
The context is being extracted from the keyword arguments before calling
the next parent class in line of the child.
"""
def __init__(self, **kwargs):
"""Initialize the Jinja2 Environment object while loading extensions.
Does the following:
1. Establishes default_extensions (currently just a Time feature)
2. Reads extensions set in the cookiecutter.json _extensions key.
3. Attempts to load the extensions. Provides useful error if fails.
"""
context = kwargs.pop('context', {})
default_extensions = [
'cookiecutter.extensions.JsonifyExtension',
'jinja2_time.TimeExtension',
]
extensions = default_extensions + self._read_extensions(context)
try:
super(ExtensionLoaderMixin, self).__init__(
extensions=extensions,
**kwargs
)
except ImportError as err:
raise UnknownExtension('Unable to load extension: {}'.format(err))
def _read_extensions(self, context):
"""Return list of extensions as str to be passed on to the Jinja2 env.
If context does not contain the relevant info, return an empty
list instead.
"""
try:
extensions = context['cookiecutter']['_extensions']
except KeyError:
return []
else:
return [str(ext) for ext in extensions]
class StrictEnvironment(ExtensionLoaderMixin, Environment):
"""Create strict Jinja2 environment.
Jinja2 environment will raise error on undefined variable in template-
rendering context.
"""
def __init__(self, **kwargs):
"""Set the standard Cookiecutter StrictEnvironment.
Also loading extensions defined in cookiecutter.json's _extensions key.
"""
super(StrictEnvironment, self).__init__(
undefined=StrictUndefined,
**kwargs
)
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