Django app to load from a webapp bundle

loader-templatetags-loader.py

import os
import re
import logging
from django import template
from django.conf import settings
from django.utils.safestring import mark_safe
from django.templatetags.static import static
from loader.utils import BundleMap


logger = logging.getLogger(__name__)

if not settings.DEBUG:
    _map = BundleMap(settings.STATIC_ROOT)

register = template.Library()


@register.simple_tag
def load_cssbundle(name):
    if settings.DEBUG:
        fname = '{}.bundle.css'.format(name)
    else:
        fname = _map.get_bundle('css', name)
    logger.debug('Serving css bundle {} from {}'.format(name, fname))
    return mark_safe('<link rel="stylesheet" href="{}"/>'.format(static(fname)))


@register.simple_tag
def load_jsbundle(name):
    if settings.DEBUG:
        fname = '{}.bundle.js'.format(name)
    else:
        fname = _map.get_bundle('js', name)
    logger.debug('Serving js bundle {} from {}'.format(name, fname))
    return mark_safe('<script src="{}"></script>'.format(static(fname)))

loader-utils.py

import os
import re


class BundleMap(object):

    def __init__(self, rootpath):
        self.rootpath = rootpath
        self.rebuild()

    def rebuild(self):
        self.map = { 'css': {}, 'js': {} }
        for name in os.listdir(self.rootpath):
            m = re.match(r'([a-z]+)\.[a-z0-9]+\.bundle.(js|css)', name)
            if m is not None:
                bname = m.group(1)
                btype = m.group(2)
                if btype in self.map:
                    self.map[btype][bname] = name
    
    def get_bundle(self, btype, name):
        return self.map[btype][name] if name in self.map[btype] else None