Deprecate Pleroma.Uploaders.S3, :public_endpoint

lib/pleroma/config/deprecation_warnings.ex

@@ -40,7 +40,8 @@ defmodule Pleroma.Config.DeprecationWarnings do
          :ok <- check_welcome_message_config(),
          :ok <- check_gun_pool_options(),
          :ok <- check_activity_expiration_config(),
-         :ok <- check_remote_ip_plug_name() do
+         :ok <- check_remote_ip_plug_name(),
+         :ok <- check_uploders_s3_public_endpoint() do
       :ok
     else
       _ ->
@@ -193,4 +194,25 @@ defmodule Pleroma.Config.DeprecationWarnings do
       warning_preface
     )
   end
+
+  @spec check_uploders_s3_public_endpoint() :: :ok | nil
+  def check_uploders_s3_public_endpoint do
+    s3_config = Pleroma.Config.get([Pleroma.Uploaders.S3])
+
+    use_old_config = Keyword.has_key?(s3_config, :public_endpoint)
+
+    if use_old_config do
+      Logger.error("""
+      !!!DEPRECATION WARNING!!!
+      Your config is using the old setting for controlling the URL of media uploaded to your S3 bucket.\n
+      Please make the following change at your earliest convenience.\n
+      \n* `config :pleroma, Pleroma.Uploaders.S3, public_endpoint` is now equal to:
+      \n* `config :pleroma, Pleroma.Upload, base_url`
+      """)
+
+      :error
+    else
+      :ok
+    end
+  end
 end