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