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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   @reject_groups [
  16     :postgrex,
  17     :tesla
  18   ]
  19
  20   if Code.ensure_loaded?(Config.Reader) do
  21     @reader Config.Reader
  22
  23     def read(path), do: @reader.read!(path)
  24   else
  25     # support for Elixir less than 1.9
  26     @reader Mix.Config
  27     def read(path) do
  28       path
  29       |> @reader.eval!()
  30       |> elem(0)
  31     end
  32   end
  33
  34   @spec read(Path.t()) :: keyword()
  35
  36   @spec merge(keyword(), keyword()) :: keyword()
  37   def merge(c1, c2), do: @reader.merge(c1, c2)
  38
  39   @spec default_config() :: keyword()
  40   def default_config do
  41     "config/config.exs"
  42     |> read()
  43     |> filter()
  44   end
  45
  46   defp filter(configs) do
  47     configs
  48     |> Keyword.keys()
  49     |> Enum.reduce([], &Keyword.put(&2, &1, filter_group(&1, configs)))
  50   end
  51
  52   @spec filter_group(atom(), keyword()) :: keyword()
  53   def filter_group(group, configs) do
  54     Enum.reject(configs[group], fn {key, _v} ->
  55       key in @reject_keys or group in @reject_groups or
  56         (group == :phoenix and key == :serve_endpoints)
  57     end)
  58   end
  59 end