Extract start function for options

lib/meditate.ex

@@ -7,7 +7,7 @@ defmodule Mix.Tasks.Meditate do
     Code.compiler_options(ignore_module_conflict: true)
     Watcher.start
 
-    Options.parse(args)
+    Options.start(args)
     Runner.run
 
     :timer.sleep(:infinity)

lib/options.ex

@@ -3,12 +3,8 @@ defmodule Options do
     clear_screen: false
   }
 
-  def parse(args) do
+  def start(args) do
-    options = Enum.reduce(args, @defaults, fn(arg, acc) ->
+    Agent.start_link(fn -> parse(args) end, name: __MODULE__)
-      Map.merge(acc, parse_argument(arg))
-    end)
-
-    Agent.start_link(fn -> options end, name: __MODULE__)
   end
 
   def clear_screen? do
@@ -17,6 +13,12 @@ defmodule Options do
     end)
   end
 
+  defp parse(args) do
+    Enum.reduce(args, @defaults, fn(arg, acc) ->
+      Map.merge(acc, parse_argument(arg))
+    end)
+  end
+
   def parse_argument("--clear-screen"), do: %{ clear_screen: true}
   def parse_argument(_), do: %{}
 end

test/options_test.exs

@@ -2,17 +2,17 @@ defmodule OptionTest do
   use ExUnit.Case, async: true
 
   test "has default options" do
-    Options.parse([])
+    Options.start([])
     refute Options.clear_screen?
   end
 
   test "override clearing of screen" do
-    Options.parse(["--clear-screen"])
+    Options.start(["--clear-screen"])
     assert Options.clear_screen?
   end
 
   test "ignores unknown options" do
-    options = Options.parse(["--foo"])
+    Options.start(["--foo"])
     refute Options.clear_screen?
   end
 end