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# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import importlib
import django
from django.conf import settings
#
# Django compatibility
#
def load_tag_library(libname):
"""Load a templatetag library on multiple Django versions.
Returns None if the library isn't loaded.
"""
if django.VERSION < (1, 9):
from django.template.base import get_library, InvalidTemplateLibrary
try:
lib = get_library(libname)
return lib
except InvalidTemplateLibrary:
return None
else:
from django.template.backends.django import get_installed_libraries
from django.template.library import InvalidTemplateLibrary
try:
lib = get_installed_libraries()[libname]
lib = importlib.import_module(lib).register
return lib
except (InvalidTemplateLibrary, KeyError):
return None
def add_to_builtins_compat(name):
if django.VERSION < (1, 9):
from django.template.base import add_to_builtins
add_to_builtins(name)
else:
from django.template import engines
engines['django'].engine.builtins.append(name)
def get_template_setting(template_key, default=None):
""" Read template settings pre and post django 1.8 """
templates_var = getattr(settings, 'TEMPLATES', None)
if templates_var is not None and template_key in templates_var[0]:
return templates_var[0][template_key]
if template_key == 'DIRS':
pre18_template_key = 'TEMPLATES_%s' % template_key
value = getattr(settings, pre18_template_key, default)
return value
return default
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