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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Config.Loader do
   6   @reject_keys [
   7     Pleroma.Repo,
   8     Pleroma.Web.Endpoint,
   9     :env,
  10     :configurable_from_database,
  11     :database,
  12     :swarm
  13   ]
  14
  15   if Code.ensure_loaded?(Config.Reader) do
  16     @spec load(Path.t()) :: keyword()
  17     def load(path), do: Config.Reader.read!(path)
  18
  19     defp do_merge(conf1, conf2), do: Config.Reader.merge(conf1, conf2)
  20   else
  21     # support for Elixir less than 1.9
  22     @spec load(Path.t()) :: keyword()
  23     def load(path) do
  24       path
  25       |> Mix.Config.eval!()
  26       |> elem(0)
  27     end
  28
  29     defp do_merge(conf1, conf2), do: Mix.Config.merge(conf1, conf2)
  30   end
  31
  32   @spec load_and_merge() :: keyword()
  33   def load_and_merge do
  34     all_paths =
  35       if Pleroma.Config.get(:release),
  36         do: ["config/config.exs", "config/releases.exs"],
  37         else: ["config/config.exs"]
  38
  39     all_paths
  40     |> Enum.map(&load(&1))
  41     |> Enum.reduce([], &do_merge(&2, &1))
  42     |> filter()
  43   end
  44
  45   defp filter(configs) do
  46     configs
  47     |> Keyword.keys()
  48     |> Enum.reduce([], &Keyword.put(&2, &1, filter_group(&1, configs)))
  49   end
  50
  51   @spec filter_group(atom(), keyword()) :: keyword()
  52   def filter_group(group, configs) do
  53     Enum.reject(configs[group], fn {key, _v} ->
  54       key in @reject_keys or (group == :phoenix and key == :serve_endpoints)
  55     end)
  56   end
  57 end