Bug 1258700 - Update to WhiteNoise 3.0

There are some backwards incompatible changes:
http://whitenoise.evans.io/en/latest/changelog.html
https://github.com/evansd/whitenoise/compare/v2.0.6...v3.0

Specifically:
* The CLI compression utility must now be called via
`python -m whitenoise.compress` rather than `python -m whitenoise.gzip`.
* The `whitenoise.django.GzipManifestStaticFilesStorage` storage backend
has moved to `whitenoise.storage.CompressedManifestStaticFilesStorage`.
* The internal `add_files()` method has been split into two and the part
which we need to subclass is now named `update_files_dictionary()`. See:
07f9c0bece

bin/post_compile

@@ -12,7 +12,7 @@ echo $SOURCE_VERSION > dist/revision.txt
 # WhiteNoise can then serve in preference to the originals. This is required
 # since WhiteNoise's Django storage backend only gzips assets handled by
 # collectstatic, and so does not affect files in the `dist/` directory.
-python -m whitenoise.gzip dist
+python -m whitenoise.compress dist
 
 # The post_compile script is run in a sub-shell, so we need to source the
 # buildpack's utils script again, so we can use set-env/set-default-env:

deployment/update/update.py

@@ -69,7 +69,7 @@ def update(ctx):
         # WhiteNoise can then serve in preference to the originals. This is required
         # since WhiteNoise's Django storage backend only gzips assets handled by
         # collectstatic, and so does not affect files in the `dist/` directory.
-        ctx.local("python2.7 -m whitenoise.gzip dist")
+        ctx.local("python2.7 -m whitenoise.compress dist")
         # Collect the static files (eg for the Persona or Django admin UI)
         run_local_with_env(ctx, "python2.7 manage.py collectstatic --noinput")
         # Update the database schema, if necessary.

requirements/common.txt

@@ -4,7 +4,7 @@ gunicorn==19.4.5 --hash=sha256:c57f1b005a4b90933303c8deed9bedeb509331aa6a0a99002
 
 wsgi-sslify==1.0.1 --hash=sha256:cde368fda0fb9958dd58bc2cb955d0bf3df1b79c132d97cee90be5fda34a5089
 
-whitenoise==2.0.6 --hash=sha256:826ffe5d608c9dc8daebef1b0b43d01f7958f17c2fce36e75c80e26160172c4f
+whitenoise==3.0 --hash=sha256:2537cf2b0c12e1c8beaa23605076344a89d08b686592abffddb6ba13b284a8c6
 
 Django==1.8.10 --hash=sha256:471b41cb53d675138475b488c429424ed143e57ad755a2c8ab1206ac30490284
 

treeherder/config/settings.py

@@ -48,7 +48,7 @@ PERFHERDER_ALERTS_MAX_AGE = timedelta(weeks=2)
 
 # Create hashed+gzipped versions of assets during collectstatic,
 # which will then be served by WhiteNoise with a suitable max-age.
-STATICFILES_STORAGE = 'whitenoise.django.GzipManifestStaticFilesStorage'
+STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'
 
 TEMPLATE_LOADERS = [
     "django.template.loaders.filesystem.Loader",

treeherder/config/whitenoise_custom.py

@@ -9,8 +9,8 @@ class CustomWhiteNoise(DjangoWhiteNoise):
     IMMUTABLE_FILE_RE = re.compile(r'\.min-[a-f0-9]{32}\.(js|css)$')
     INDEX_NAME = 'index.html'
 
-    def add_files(self, *args, **kwargs):
-        super(CustomWhiteNoise, self).add_files(*args, **kwargs)
+    def update_files_dictionary(self, *args):
+        super(CustomWhiteNoise, self).update_files_dictionary(*args)
         index_page_suffix = "/" + self.INDEX_NAME
         index_name_length = len(self.INDEX_NAME)
         index_files = {}