run tasks with unlinked testcontainers genserver,

this will die when the beam process exits
fixes #197

Author: jarlah

lib/mix/tasks/testcontainers/run.ex

@@ -21,7 +21,7 @@ defmodule Mix.Tasks.Testcontainers.Run do
       {:ok, _} = Application.ensure_all_started(app)
     end)
 
-    {:ok, _} = Testcontainers.start_link()
+    {:ok, _} = Testcontainers.start()
 
     {opts, rest_args, _} =
       OptionParser.parse(args,
@@ -41,25 +41,24 @@ defmodule Mix.Tasks.Testcontainers.Run do
         [] -> {"test", []}
       end
 
-    run_sub_task_and_exit(database, sub_task, sub_task_args, db_volume)
-  end
+    IO.puts("Starting database container: #{database}")
+    IO.puts("Using database volume: #{db_volume || "none"}")
 
-  @spec run_sub_task_and_exit(String.t(), String.t(), list(String.t()), String.t() | nil) :: no_return()
-  defp run_sub_task_and_exit(database, sub_task, sub_task_args, db_volume) do
-    {container, env} = setup_container(database, db_volume)
+    {_container, env} = setup_container(database, db_volume)
 
-    IO.puts("Starting in-process mix task: #{sub_task} #{Enum.join(sub_task_args, " ")}")
+    run_sub_task_and_exit(sub_task, sub_task_args, env)
+  end
 
-    System.at_exit(fn _ ->
-      try do
-        Testcontainers.stop_container(container.container_id)
-      catch
-        _, _ -> :ok
-      end
-    end)
+  @spec run_sub_task_and_exit(String.t(), list(String.t()), list({String.t(), String.t()})) :: no_return()
+  defp run_sub_task_and_exit(sub_task, sub_task_args, env) do
+
+    IO.puts("Starting mix task: #{sub_task} #{Enum.join(sub_task_args, " ")}")
 
     Enum.each(env, fn {k, v} -> System.put_env(k, v) end)
-    Mix.Task.run(sub_task, sub_task_args)
+
+    :ok = Mix.Task.run(sub_task, sub_task_args)
+
+    IO.puts("Task finished: #{sub_task} #{Enum.join(sub_task_args, " ")}")
   end
 
   defp setup_container(database, db_volume) do

lib/testcontainers.ex

@@ -22,10 +22,24 @@ defmodule Testcontainers do
 
   @timeout 300_000
 
+  @doc """
+  Starts the Testcontainers application.
+
+  This will terminate when the calling process exits, for ex a task.
+  """
   def start_link(options \\ []) do
     GenServer.start_link(__MODULE__, options, name: Keyword.get(options, :name, __MODULE__))
   end
 
+  @doc """
+  Starts the Testcontainers application.
+
+  This will NOT terminate when the calling process exits, for ex a task.
+  """
+  def start(options \\ []) do
+    GenServer.start(__MODULE__, options, name: Keyword.get(options, :name, __MODULE__))
+  end
+
   @impl true
   def init(options \\ []) do
     Process.flag(:trap_exit, true)

lib/util/constants.ex

@@ -2,7 +2,7 @@ defmodule Testcontainers.Constants do
   @moduledoc false
 
   def library_name, do: :testcontainers
-  def library_version, do: "1.13.2"
+  def library_version, do: "1.13.3"
   def ryuk_version, do: "0.11.0"
   def container_label, do: "org.testcontainers"
   def container_lang_label, do: "org.testcontainers.lang"

mix.exs

@@ -2,7 +2,7 @@ defmodule TestcontainersElixir.MixProject do
   use Mix.Project
 
   @app :testcontainers
-  @version "1.13.2"
+  @version "1.13.3"
   @source_url "https://github.com/testcontainers/testcontainers-elixir"
 
   def project do