Made the add-on not immediately crash on Blender 2.8

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Replace BAM with BAT🦇.
 - Don't crash the texture browser when an invalid texture is seen.
 - Support colour strips as Attract shots.
+- Blender 2.8 support (work in progress).
 
 
 ## Version 1.8 (2018-01-03)

blender_cloud/attract/__init__.py

@@ -931,7 +931,10 @@ def activate():
 
     log.info('Activating Attract')
     attract_is_active = True
-    bpy.app.handlers.scene_update_post.append(scene_update_post_handler)
+
+    # TODO: properly fix 2.8 compatibility; this is just a workaround.
+    if hasattr(bpy.app.handlers, 'scene_update_post'):
+        bpy.app.handlers.scene_update_post.append(scene_update_post_handler)
     draw.callback_enable()
 
 
@@ -942,11 +945,13 @@ def deactivate():
     attract_is_active = False
     draw.callback_disable()
 
-    try:
-        bpy.app.handlers.scene_update_post.remove(scene_update_post_handler)
-    except ValueError:
-        # This is thrown when scene_update_post_handler does not exist in the handler list.
-        pass
+    # TODO: properly fix 2.8 compatibility; this is just a workaround.
+    if hasattr(bpy.app.handlers, 'scene_update_post'):
+        try:
+            bpy.app.handlers.scene_update_post.remove(scene_update_post_handler)
+        except ValueError:
+            # This is thrown when scene_update_post_handler does not exist in the handler list.
+            pass
 
 
 def register():