From c9203f125c3ce44bc7b7273fedca089aadfb6b86 Mon Sep 17 00:00:00 2001
From: Mark Felder <feld@feld.me>
Date: Mon, 15 Jul 2024 15:21:16 -0400
Subject: [PATCH] Added a Mix task "pleroma.config fix_mrf_policies" which will
 remove erroneous MRF policies from ConfigDB

---
 changelog.d/fix-mrfs.add        |  1 +
 lib/mix/tasks/pleroma/config.ex | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 changelog.d/fix-mrfs.add

diff --git a/changelog.d/fix-mrfs.add b/changelog.d/fix-mrfs.add
new file mode 100644
index 000000000..a38830109
--- /dev/null
+++ b/changelog.d/fix-mrfs.add
@@ -0,0 +1 @@
+Added a Mix task "pleroma.config fix_mrf_policies" which will remove erroneous MRF policies from ConfigDB
diff --git a/lib/mix/tasks/pleroma/config.ex b/lib/mix/tasks/pleroma/config.ex
index 3a2ea44f8..8b3b2f18b 100644
--- a/lib/mix/tasks/pleroma/config.ex
+++ b/lib/mix/tasks/pleroma/config.ex
@@ -205,6 +205,35 @@ def run(["delete", group]) do
     end
   end
 
+  # Removes any policies that are not a real module
+  # as they will prevent the server from starting
+  def run(["fix_mrf_policies"]) do
+    check_configdb(fn ->
+      start_pleroma()
+
+      group = :pleroma
+      key = :mrf
+
+      %{value: value} =
+        group
+        |> ConfigDB.get_by_group_and_key(key)
+
+      policies =
+        Keyword.get(value, :policies, [])
+        |> Enum.filter(&is_atom(&1))
+        |> Enum.filter(fn mrf ->
+          case Code.ensure_compiled(mrf) do
+            {:module, _} -> true
+            {:error, _} -> false
+          end
+        end)
+
+      value = Keyword.put(value, :policies, policies)
+
+      ConfigDB.update_or_create(%{group: group, key: key, value: value})
+    end)
+  end
+
   @spec migrate_to_db(Path.t() | nil) :: any()
   def migrate_to_db(file_path \\ nil) do
     with :ok <- Pleroma.Config.DeprecationWarnings.warn() do