[feature] Added static files minification and cache invalidation #216

Fixes #216

tasks/pip.yml

@@ -177,6 +177,21 @@
   tags:
     - molecule-idempotence-notest
 
+- name: Install static minification dependencies
+  pip:
+    name:
+      - django-pipeline~=2.0.0
+      - django-compress-staticfiles~=1.0.1b
+    state: latest
+    virtualenv: "{{ virtualenv_path }}"
+    virtualenv_python: "{{ openwisp2_python }}"
+    virtualenv_site_packages: yes
+  retries: 5
+  delay: 10
+  register: result
+  until: result is success
+  notify: reload supervisor
+
 - name: Install uwsgi
   pip:
     name: uwsgi

templates/openwisp2/settings.py

@@ -322,6 +322,19 @@
     }
 }
 
+# HTML minification with django pipeline
+INSTALLED_APPS.append('pipeline')
+MIDDLEWARE.append('pipeline.middleware.MinifyHTMLMiddleware')
+PIPELINE = {
+    'PIPELINE_ENABLED': True
+}
+
+# static files minification and invalidation with django-compress-staticfiles
+STATICFILES_STORAGE = 'compress_staticfiles.storage.CompressStaticFilesStorage'
+# GZIP compression is handled by nginx
+BROTLI_STATIC_COMPRESSION = False
+GZIP_STATIC_COMPRESSION = False 
+
 {% if openwisp2_sentry.get('dsn') %}
 RAVEN_CONFIG = {{ openwisp2_sentry|to_nice_json }}
 {% endif %}