1 files changed, 53 insertions, 0 deletions
diff --git a/lib/pleroma/config/loader.ex b/lib/pleroma/config/loader.ex
new file mode 100644
index 000000000..0f3ecf1ed
--- /dev/null
+++ b/lib/pleroma/config/loader.ex
@@ -0,0 +1,53 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Config.Loader do
+  @reject_keys [
+    Pleroma.Repo,
+    Pleroma.Web.Endpoint,
+    :env,
+    :configurable_from_database,
+    :database,
+    :swarm
+  ]
+
+  if Code.ensure_loaded?(Config.Reader) do
+    @reader Config.Reader
+
+    def read(path), do: @reader.read!(path)
+  else
+    # support for Elixir less than 1.9
+    @reader Mix.Config
+    def read(path) do
+      path
+      |> @reader.eval!()
+      |> elem(0)
+    end
+  end
+
+  @spec read(Path.t()) :: keyword()
+
+  @spec merge(keyword(), keyword()) :: keyword()
+  def merge(c1, c2), do: @reader.merge(c1, c2)
+
+  @spec default_config() :: keyword()
+  def default_config do
+    "config/config.exs"
+    |> read()
+    |> filter()
+  end
+
+  defp filter(configs) do
+    configs
+    |> Keyword.keys()
+    |> Enum.reduce([], &Keyword.put(&2, &1, filter_group(&1, configs)))
+  end
+
+  @spec filter_group(atom(), keyword()) :: keyword()
+  def filter_group(group, configs) do
+    Enum.reject(configs[group], fn {key, _v} ->
+      key in @reject_keys or (group == :phoenix and key == :serve_endpoints) or group == :postgrex
+    end)
+  end
+end