Use a task for key exchanges

.gitignore

@@ -35,5 +35,5 @@ chronoscope-*.tar
 npm-debug.log
 /assets/node_modules/
 
-# IDE files
+# Ignore IDE files.
 .elixir_ls/

lib/chronoscope/application.ex

@@ -15,9 +15,10 @@ defmodule Chronoscope.Application do
       {Finch, name: Chronoscope.Finch},
       # Start a worker by calling: Chronoscope.Worker.start_link(arg)
       # {Chronoscope.Worker, arg},
+      {Task.Supervisor, name: Chronoscope.TaskSupervisor},
+      Chronoscope.NTS.Client,
       # Start to serve requests, typically the last entry
-      ChronoscopeWeb.Endpoint,
+      ChronoscopeWeb.Endpoint
-      Chronoscope.NTS.Client
     ]
 
     # See https://hexdocs.pm/elixir/Supervisor.html

lib/chronoscope/nts.ex

@@ -18,6 +18,6 @@ defmodule Chronoscope.NTS do
   end
 
   def key_establishment(host, port) do
-    GenServer.call(Client, {:key_establishment, %{host: host, port: port}})
+    GenServer.call(Client, {:key_establishment, %{host: host, port: port}}, 10_000)
   end
 end

lib/chronoscope/nts/client.ex

@@ -68,8 +68,13 @@ defmodule Chronoscope.NTS.Client do
   end
 
   defp current_data(server, now) do
+    response =
+      Chronoscope.TaskSupervisor
+      |> Task.Supervisor.async(fn -> KeyEstablishmentClient.key_establishment(server) end)
+      |> Task.await(10_000)
+
     %{
-      key_establishment_response: KeyEstablishmentClient.key_establishment(server),
+      key_establishment_response: response,
       last_key_establishment: now
     }
   end

lib/mix/tasks/deploy.ex

@@ -0,0 +1,32 @@
+defmodule Mix.Tasks.Deploy do
+  use Mix.Task
+
+  @moduledoc """
+  Deploy this application to production.
+  """
+
+  @shortdoc "deploy to production"
+
+  @spec run([...]) :: any
+  def run([host]) do
+    System.cmd(
+      "rsync",
+      [
+        "--archive",
+        "--delete",
+        "--compress",
+        "--human-readable",
+        "--progress",
+        "--stats",
+        "--verbose",
+        "--exclude-from=.gitignore",
+        "--exclude=.git/",
+        "./",
+        "#{host}:chronoscope/"
+      ],
+      into: IO.stream()
+    )
+
+    System.cmd("ssh", [host, "cd chronoscope && buildah build -t chronoscope:latest && podman auto-update"], into: IO.stream())
+  end
+end