config versioningfeature/config-versioning

- added DynamicSupervisor, which starts Pleroma deps and restarts config dependent deps
- added versioning for in database config. New version is created from
changes which are passed to config update/delete endpoint. Every version
contains backup with all changes added through update. Versioning
supports rollbacks with N steps. With a rollback, all versions that
come after the version on which the rollback was made are deleted.

1 files changed, 30 insertions, 0 deletions

diff --git a/lib/pleroma/http/hackney_supervisor.ex b/lib/pleroma/http/hackney_supervisor.ex
new file mode 100644
index 000000000..0e36f0273
--- /dev/null
+++ b/lib/pleroma/http/hackney_supervisor.ex
@@ -0,0 +1,30 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.HTTP.HackneySupervisor do
+  use Supervisor
+
+  def start_link(_) do
+    Supervisor.start_link(__MODULE__, :no_arg)
+  end
+
+  def init(_) do
+    pools = [:federation, :media]
+
+    pools =
+      if Pleroma.Config.get([Pleroma.Upload, :proxy_remote]) do
+        [:upload | pools]
+      else
+        pools
+      end
+
+    children =
+      for pool <- pools do
+        options = Pleroma.Config.get([:hackney_pools, pool])
+        :hackney_pool.child_spec(pool, options)
+      end
+
+    Supervisor.init(children, strategy: :one_for_one)
+  end
+end