Use System.no_halt(true)

bandit.exs

@@ -21,8 +21,4 @@ bandit = {Bandit, plug: Router, scheme: :http, port: 4000}
 require Logger
 Logger.info("starting #{inspect(bandit)}")
 {:ok, _} = Supervisor.start_link([bandit], strategy: :one_for_one)
-
-# unless running from IEx, sleep idenfinitely so we can serve requests
-unless IEx.started?() do
-  Process.sleep(:infinity)
-end
+System.no_halt(true)

exshome.exs

@@ -33,7 +33,7 @@ Application.put_all_env(
 
 Calendar.put_time_zone_database(Tz.TimeZoneDatabase)
 
-System.no_halt(true)
 Mix.install([{:exshome, "0.1.7"}])
 
 {:ok, _} = Application.ensure_all_started(:exshome)
+System.no_halt(true)

gen_stage.exs

@@ -56,8 +56,4 @@ defmodule Main do
 end
 
 Main.main()
-
-# Unless running from IEx, sleep indefinitely so stages keep running
-unless IEx.started?() do
-  Process.sleep(:infinity)
-end
+System.no_halt(true)

phoenix.exs

@@ -45,4 +45,4 @@ defmodule SamplePhoenix.Endpoint do
 end
 
 {:ok, _} = Supervisor.start_link([SamplePhoenix.Endpoint], strategy: :one_for_one)
-Process.sleep(:infinity)
+System.no_halt(true)

phoenix_live_view.exs

@@ -81,4 +81,4 @@ defmodule SamplePhoenix.Endpoint do
 end
 
 {:ok, _} = Supervisor.start_link([SamplePhoenix.Endpoint], strategy: :one_for_one)
-Process.sleep(:infinity)
+System.no_halt(true)

plug_cowboy.exs

@@ -21,8 +21,4 @@ plug_cowboy = {Plug.Cowboy, plug: Router, scheme: :http, port: 4000}
 require Logger
 Logger.info("starting #{inspect(plug_cowboy)}")
 {:ok, _} = Supervisor.start_link([plug_cowboy], strategy: :one_for_one)
-
-# unless running from IEx, sleep idenfinitely so we can serve requests
-unless IEx.started?() do
-  Process.sleep(:infinity)
-end
+System.no_halt(true)

scenic.exs

@@ -26,11 +26,6 @@ defmodule Main do
     ]
 
     {:ok, _} = Supervisor.start_link(children, strategy: :one_for_one)
-
-    # unless running from IEx, sleep idenfinitely so the GUI keeps running
-    unless IEx.started?() do
-      Process.sleep(:infinity)
-    end
   end
 end
 
@@ -74,3 +69,4 @@ defmodule Example.Scene.Home do
 end
 
 Main.main()
+System.no_halt(true)