Enable deprecation warnings on external code

edk2 invocables consume and execute external code. This includes the
settings file and the plugins.  These changes enable deprecation
warnings for those imported modules so that developers can see when they
are using deprecated code.

edk2toolext/edk2_invocable.py

@@ -21,6 +21,7 @@
 import logging
 import os
 import sys
+import warnings
 from random import choice
 from string import ascii_letters
 from textwrap import dedent
@@ -391,6 +392,9 @@ def ParseCommandLineOptions(self):
             print(e)
             sys.exit(2)
 
+        # Turn on Deprecation warnings for code in the module
+        warnings.filterwarnings("default", category=DeprecationWarning, module=self.PlatformModule.__name__)
+
         # instantiate the second argparser that will get passed around
         parserObj = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter,)
 

edk2toolext/environment/plugin_manager.py

@@ -11,6 +11,7 @@
 import logging
 import os
 import sys
+import warnings
 
 from edk2toolext.environment import shell_environment
 
@@ -101,6 +102,9 @@ def _load(self, PluginDescriptor):
             if py_module_dir not in sys.path:
                 sys.path.append(py_module_dir)
 
+            # Turn on Deprecation warnings for code in the plugin
+            warnings.filterwarnings("default", category=DeprecationWarning, module=module.__name__)
+
             spec.loader.exec_module(module)
         except Exception:
             exc_info = sys.exc_info()