Cachex: Make caching provider switchable at runtime.

Defaults to Cachex.

lib/pleroma/html.ex

@@ -6,6 +6,8 @@ defmodule Pleroma.HTML do
   # Scrubbers are compiled on boot so they can be configured in OTP releases
   #  @on_load :compile_scrubbers
 
+  @cachex Pleroma.Config.get([:cachex, :provider], Cachex)
+
   def compile_scrubbers do
     dir = Path.join(:code.priv_dir(:pleroma), "scrubbers")
 
@@ -56,7 +58,7 @@ defmodule Pleroma.HTML do
       ) do
     key = "#{key}#{generate_scrubber_signature(scrubbers)}|#{activity.id}"
 
-    Cachex.fetch!(:scrubber_cache, key, fn _key ->
+    @cachex.fetch!(:scrubber_cache, key, fn _key ->
       object = Pleroma.Object.normalize(activity)
       ensure_scrubbed_html(content, scrubbers, object.data["fake"] || false, callback)
     end)
@@ -105,7 +107,7 @@ defmodule Pleroma.HTML do
     unless object.data["fake"] do
       key = "URL|#{object.id}"
 
-      Cachex.fetch!(:scrubber_cache, key, fn _key ->
+      @cachex.fetch!(:scrubber_cache, key, fn _key ->
         {:commit, {:ok, extract_first_external_url(content)}}
       end)
     else