1 # Wrapper for loading templates from eggs via pkg_resources.resource_string.

     2 

     3 try:

     4     from pkg_resources import resource_string

     5 except ImportError:

     6     resource_string = None

     7 

     8 from django.template import TemplateDoesNotExist

     9 from django.template.loader import BaseLoader

    10 from django.conf import settings

    11 

    12 class Loader(BaseLoader):

    13     is_usable = resource_string is not None

    14 

    15     def load_template_source(self, template_name, template_dirs=None):

    16         """

    17         Loads templates from Python eggs via pkg_resource.resource_string.

    18 

    19         For every installed app, it tries to get the resource (app, template_name).

    20         """

    21         if resource_string is not None:

    22             pkg_name = 'templates/' + template_name

    23             for app in settings.INSTALLED_APPS:

    24                 try:

    25                     return (resource_string(app, pkg_name).decode(settings.FILE_CHARSET), 'egg:%s:%s' % (app, pkg_name))

    26                 except:

    27                     pass

    28         raise TemplateDoesNotExist(template_name)

    29 

    30 _loader = Loader()

    31 

    32 def load_template_source(template_name, template_dirs=None):

    33     import warnings

    34     warnings.warn(

    35         "'django.template.loaders.eggs.load_template_source' is deprecated; use 'django.template.loaders.eggs.Loader' instead.",

    36         PendingDeprecationWarning

    37     )

    38     return _loader.load_template_source(template_name, template_dirs)

    39 load_template_source.is_usable = resource_string is not None