Add env var to enable/disable thumbnail generation

.env.dev.example

@@ -50,5 +50,8 @@ EMAIL_HOST_PASSWORD=emailpassword123
 EMAIL_USE_TLS=true
 EMAIL_USE_SSL=false
 
+# Thumbnails Generation
+ENABLE_THUMBNAIL_GENERATION=false
+
 # Set this to true when initializing certbot for domain, false when not
 CERTBOT_INIT=false

.env.prod.example

@@ -50,5 +50,8 @@ EMAIL_HOST_PASSWORD=emailpassword123
 EMAIL_USE_TLS=true
 EMAIL_USE_SSL=false
 
+# Thumbnails Generation
+ENABLE_THUMBNAIL_GENERATION=false
+
 # Set this to true when initializing certbot for domain, false when not
 CERTBOT_INIT=false

bookwyrm/context_processors.py

@@ -1,5 +1,5 @@
 """ customize the info available in context for rendering templates """
-from bookwyrm import models
+from bookwyrm import models, settings
 
 
 def site_settings(request):  # pylint: disable=unused-argument
@@ -7,4 +7,5 @@ def site_settings(request):  # pylint: disable=unused-argument
     return {
         "site": models.SiteSettings.objects.get(),
         "active_announcements": models.Announcement.active_announcements(),
+        "enable_thumbnail_generation": settings.ENABLE_THUMBNAIL_GENERATION,
     }

bookwyrm/models/book.py

@@ -6,7 +6,7 @@ from model_utils.managers import InheritanceManager
 from imagekit.models import ImageSpecField
 
 from bookwyrm import activitypub
-from bookwyrm.settings import DOMAIN, DEFAULT_LANGUAGE
+from bookwyrm.settings import DOMAIN, DEFAULT_LANGUAGE, ENABLE_THUMBNAIL_GENERATION
 
 from .activitypub_mixin import OrderedCollectionPageMixin, ObjectMixin
 from .base_model import BookWyrmModel
@@ -88,6 +88,7 @@ class Book(BookDataModel):
 
     objects = InheritanceManager()
 
+    if ENABLE_THUMBNAIL_GENERATION:
         cover_bw_book_xsmall_webp = ImageSpecField(source="cover", id="bw:book:xsmall:webp")
         cover_bw_book_xsmall_jpg = ImageSpecField(source="cover", id="bw:book:xsmall:jpg")
         cover_bw_book_small_webp = ImageSpecField(source="cover", id="bw:book:small:webp")

bookwyrm/settings.py

@@ -187,4 +187,5 @@ USER_AGENT = "%s (BookWyrm/%s; +https://%s/)" % (
 )
 
 # Imagekit generated thumbnails
+ENABLE_THUMBNAIL_GENERATION = env.bool("ENABLE_THUMBNAIL_GENERATION", False)
 IMAGEKIT_CACHEFILE_DIR = "thumbnails"

bookwyrm/templates/snippets/book_cover.html

@@ -1,6 +1,7 @@
 {% spaceless %}
 
 {% load i18n %}
+{% load static %}
 {% load imagekit %}
 
 {% if book.cover %}
@@ -14,6 +15,8 @@
             >
         {% else %}
 
+            {% if enable_thumbnail_generation %}
+
                 {% if size_mobile == 'xsmall' %}
                     <source
                         media="(max-width: 768px)"
@@ -102,9 +105,11 @@
                     <source type="image/jpg" srcset="{{ book.cover_bw_book_xxlarge_jpg.url }}"/>
                 {% endif %}
 
+            {% endif %}
+
             <img
                 class="book-cover"
-                src="/images/{{ book.cover }}"
+                src="{% get_media_prefix %}{{ book.cover }}"
                 itemprop="thumbnailUrl"
                 alt="{{ book.alt_text|default:'' }}"
             >
@@ -116,7 +121,7 @@
     <figure class="cover-container no-cover {{ cover_class }}">
         <img
             class="book-cover"
-            src="/static/images/no_cover.jpg"
+            src="{% static "images/no_cover.jpg" %}"
             alt="{% trans "No cover" %}"
         >
         <figcaption class="cover-caption">