Allow to use Mix tasks inside Releases

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mix/tasks/mobilizon/relay/accept.ex

@@ -0,0 +1,28 @@
+defmodule Mix.Tasks.Mobilizon.Relay.Accept do
+  @moduledoc """
+  Task to accept an instance follow request
+  """
+  use Mix.Task
+  alias Mobilizon.Federation.ActivityPub.Relay
+  import Mix.Tasks.Mobilizon.Common
+
+  @shortdoc "Accept an instance follow request"
+
+  @impl Mix.Task
+  def run([target]) do
+    start_mobilizon()
+
+    case Relay.accept(target) do
+      {:ok, _activity} ->
+        # put this task to sleep to allow the genserver to push out the messages
+        :timer.sleep(500)
+
+      {:error, e} ->
+        IO.puts(:stderr, "Error while accept #{target} follow: #{inspect(e)}")
+    end
+  end
+
+  def run(_) do
+    shell_error("mobilizon.relay.accept requires an instance hostname as arguments")
+  end
+end