old_contents: import os
  from django.core.management.base import LabelCommand
  from django.conf import settings
  from dimagi.utils import gitinfo
  from django.core import cache
  
  
  rcache = cache.get_cache('redis')
  COMPRESS_PREFIX = '#compress_%s'
  CACHE_DIR = '%s/CACHE' % settings.STATIC_ROOT
  MANIFEST_FILE = '%s/manifest.json' % CACHE_DIR
  
  
  class ResourceCompressError(Exception):
      pass
  
  
  class Command(LabelCommand):
      help = "Prints the paths of all the static files"
      args = "save"
  
      root_dir = settings.FILEPATH
  
      def output_manifest(self, manifest_str):
          print "saving manifest.json to disk"
          if not os.path.exists(CACHE_DIR):
              os.makedirs(CACHE_DIR)
          with open(os.path.join(self.root_dir, MANIFEST_FILE), 'w') as fout:
              print manifest_str
              fout.write(manifest_str)
  
      def save_manifest(self):
          print "saving manifest.json to redis"
          with open(os.path.join(self.root_dir, MANIFEST_FILE), 'r') as fin:
              manifest_data = fin.read()
              print manifest_data
              rcache.set(COMPRESS_PREFIX % self.current_sha, manifest_data, 86400)
  
      def handle(self, *args, **options):
          current_snapshot = gitinfo.get_project_snapshot(self.root_dir, submodules=False)
          self.current_sha = current_snapshot['commits'][0]['sha']
          print "Current commit SHA: %s" % self.current_sha
  
          if 'save' in args:
              self.save_manifest()
          else:
              existing_resource_str = rcache.get(COMPRESS_PREFIX % self.current_sha, None)
              if existing_resource_str:
                  self.output_manifest(existing_resource_str)
              else:
                  raise ResourceCompressError(
                      "Could not find manifest.json in redis! Deploying under this "
                      "condition will cause the server to 500."
                  )
  
new_contents: import os
  from django.core.management.base import LabelCommand
  from django.conf import settings
  from dimagi.utils import gitinfo
  from django.core import cache
  
  
  rcache = cache.get_cache('redis')
  COMPRESS_PREFIX = '#compress_%s'
  CACHE_DIR = os.path.join(settings.STATIC_ROOT, 'CACHE')
  MANIFEST_FILE = os.path.join(CACHE_DIR, 'manifest.json')
  
  
  class ResourceCompressError(Exception):
      pass
  
  
  class Command(LabelCommand):
      help = "Prints the paths of all the static files"
      args = "save"
  
      root_dir = settings.FILEPATH
  
      def output_manifest(self, manifest_str):
          print "saving manifest.json to disk"
          if not os.path.exists(CACHE_DIR):
              os.makedirs(CACHE_DIR)
          with open(os.path.join(self.root_dir, MANIFEST_FILE), 'w') as fout:
              print manifest_str
              fout.write(manifest_str)
  
      def save_manifest(self):
          print "saving manifest.json to redis"
          with open(os.path.join(self.root_dir, MANIFEST_FILE), 'r') as fin:
              manifest_data = fin.read()
              print manifest_data
              rcache.set(COMPRESS_PREFIX % self.current_sha, manifest_data, 86400)
  
      def handle(self, *args, **options):
          current_snapshot = gitinfo.get_project_snapshot(self.root_dir, submodules=False)
          self.current_sha = current_snapshot['commits'][0]['sha']
          print "Current commit SHA: %s" % self.current_sha
  
          if 'save' in args:
              self.save_manifest()
          else:
              existing_resource_str = rcache.get(COMPRESS_PREFIX % self.current_sha, None)
              if existing_resource_str:
                  self.output_manifest(existing_resource_str)
              else:
                  raise ResourceCompressError(
                      "Could not find manifest.json in redis! Deploying under this "
                      "condition will cause the server to 500."
                  )
  
subject: Use os.path.join(...) instead of string formatting