This adds in the GYP files needed for our GYP build.

plugin/idl/codegen.py

Index: plugin/idl/codegen.py
===================================================================
--- plugin/idl/codegen.py	(revision 0)
+++ plugin/idl/codegen.py	(revision 0)
@@ -0,0 +1,36 @@
+#!/usr/bin/python2.4
+# Copyright 2009 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This file is just here so that we can modify the python path before
+# invoking nixysa.
+
+import subprocess
+import sys
+import os
+import os.path
+
+third_party = os.path.join('..', '..', '..', 'third_party')
+pythonpath = os.pathsep.join([os.path.join(third_party, 'gflags', 'python'),
+                              os.path.join(third_party, 'ply', 'files')])
+
+orig_pythonpath = os.environ.get('PYTHONPATH')
+if orig_pythonpath:
+  pythonpath = os.pathsep.join([pythonpath, orig_pythonpath])
+
+os.environ['PYTHONPATH'] = pythonpath
+
+nixysa = os.path.join(third_party, 'nixysa', 'files', 'codegen.py')
+status = subprocess.call([sys.executable, nixysa] + sys.argv[1:])
+sys.exit(status)