mustache.py

from django import template
from django.conf import settings
import pystache

register = template.Library()

class MustacheNode(template.Node):
    def __init__(self, template_path, attr=None):
        self.filepath = '%s/%s' % (settings.TEMPLATE_DIRS[0], template_path)
        self.attr = attr

    def render(self, context):
        fp = open(self.filepath, 'r')
        template = fp.read()
        fp.close()
        mcontext = context[self.attr] if self.attr else {}
        return pystache.render(template, mcontext)

def do_mustache(parser, token):
    """
    Loads a mustache template and render it inline
    
    Examples::
    
    {% mustache "foo/some_include" %}
    {% mustache "foo/some_include" data %}
    
    """
    bits = token.split_contents()
    if len(bits) not in  [2,3]:
        raise template.TemplateSyntaxError("%r tag takes two arguments: the location of the template file, and the optional template context" % bits[0])
    path = bits[1]
    path = path[1:-1]
    attrs = bits[2:]
    return MustacheNode(path, *attrs)


register.tag("mustache", do_mustache)