Ensure optional Phoenix is optional (#39)

lib/mix/tasks/temple.gen.html.ex

@@ -1,4 +1,5 @@
-defmodule Mix.Tasks.Temple.Gen.Html do
+if Code.ensure_loaded?(Mix.Phoenix) do
+  defmodule Mix.Tasks.Temple.Gen.Html do
     @shortdoc "Generates controller, views, and context for an HTML resource in Temple"
 
     @moduledoc """
@@ -153,9 +154,15 @@ defmodule Mix.Tasks.Temple.Gen.Html do
          Path.join([web_prefix, "templates", web_path, schema.singular, "new.html.exs"])},
         {:eex, "show.html.exs",
          Path.join([web_prefix, "templates", web_path, schema.singular, "show.html.exs"])},
-      {:eex, "view.ex", Path.join([web_prefix, "views", web_path, "#{schema.singular}_view.ex"])},
+        {:eex, "view.ex",
+         Path.join([web_prefix, "views", web_path, "#{schema.singular}_view.ex"])},
         {:eex, "controller_test.exs",
-       Path.join([test_prefix, "controllers", web_path, "#{schema.singular}_controller_test.exs"])}
+         Path.join([
+           test_prefix,
+           "controllers",
+           web_path,
+           "#{schema.singular}_controller_test.exs"
+         ])}
       ]
     end
 
@@ -252,4 +259,5 @@ defmodule Mix.Tasks.Temple.Gen.Html do
     defp error(field) do
       ~s{partial error_tag(form, #{inspect(field)})}
     end
+  end
 end

lib/mix/tasks/temple.gen.layout.ex

@@ -1,4 +1,5 @@
-defmodule Mix.Tasks.Temple.Gen.Layout do
+if Code.ensure_loaded?(Mix.Phoenix) do
+  defmodule Mix.Tasks.Temple.Gen.Layout do
     use Mix.Task
 
     @shortdoc "Generates a default Phoenix layout file in Temple"
@@ -26,4 +27,5 @@ defmodule Mix.Tasks.Temple.Gen.Layout do
     defp temple_paths do
       [".", :temple]
     end
+  end
 end