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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Config.Loader do
   6   defp reject_keys,
   7     do: [
   8       Pleroma.Repo,
   9       Pleroma.Web.Endpoint,
  10       :env,
  11       :configurable_from_database,
  12       :database,
  13       :swarm
  14     ]
  15
  16   defp reject_groups,
  17     do: [
  18       :postgrex,
  19       :tesla
  20     ]
  21
  22   if Code.ensure_loaded?(Config.Reader) do
  23     @reader Config.Reader
  24
  25     def read(path), do: @reader.read!(path)
  26   else
  27     # support for Elixir less than 1.9
  28     @reader Mix.Config
  29     def read(path) do
  30       path
  31       |> @reader.eval!()
  32       |> elem(0)
  33     end
  34   end
  35
  36   @spec read(Path.t()) :: keyword()
  37
  38   @spec merge(keyword(), keyword()) :: keyword()
  39   def merge(c1, c2), do: @reader.merge(c1, c2)
  40
  41   @spec default_config() :: keyword()
  42   def default_config do
  43     "config/config.exs"
  44     |> read()
  45     |> filter()
  46   end
  47
  48   defp filter(configs) do
  49     configs
  50     |> Keyword.keys()
  51     |> Enum.reduce([], &Keyword.put(&2, &1, filter_group(&1, configs)))
  52   end
  53
  54   @spec filter_group(atom(), keyword()) :: keyword()
  55   def filter_group(group, configs) do
  56     Enum.reject(configs[group], fn {key, _v} ->
  57       key in reject_keys() or group in reject_groups() or
  58         (group == :phoenix and key == :serve_endpoints)
  59     end)
  60   end
  61 end