refactor(led-driver): simplify websocket runtime and test layout

lib/utemplate/recompile.py

@@ -0,0 +1,21 @@
+# (c) 2014-2020 Paul Sokolovsky. MIT license.
+try:
+    from uos import stat, remove
+except:
+    from os import stat, remove
+from . import source
+
+
+class Loader(source.Loader):
+
+    def load(self, name):
+        o_path = self.pkg_path + self.compiled_path(name)
+        i_path = self.pkg_path + self.dir + "/" + name
+        try:
+            o_stat = stat(o_path)
+            i_stat = stat(i_path)
+            if i_stat[8] > o_stat[8]:
+                # input file is newer, remove output to force recompile
+                remove(o_path)
+        finally:
+            return super().load(name)