only run elixir code

ignore, for example, editor swapfiles

lib/watcher.ex

@@ -13,16 +13,18 @@ defmodule Watcher do
   end
 
   defp reload(file) do
-    try do
+    if Path.extname(file) == ".ex" do
-      file
+      try do
-      |> normalize
+        file
-      |> Code.load_file
+        |> normalize
-      |> Enum.map(&(elem(&1, 0)))
+        |> Code.load_file
-      |> Enum.find(&Runner.koan?/1)
+        |> Enum.map(&(elem(&1, 0)))
-      |> Runner.modules_to_run
+        |> Enum.find(&Runner.koan?/1)
-      |> Runner.run
+        |> Runner.modules_to_run
-    rescue
+        |> Runner.run
-      e -> Display.show_compile_error(e)
+      rescue
+        e -> Display.show_compile_error(e)
+      end
     end
   end