Attempt to invoke the code signer differently

indra/newview/viewer_manifest.py

@@ -395,9 +395,14 @@ def package_finish(self):
         self.run_command('"' + proper_windows_path(NSIS_path) + '" ' + self.dst_path_of(tempfile))
         # self.remove(self.dst_path_of(tempfile))
         # If we're on a build machine, sign the code using our Authenticode certificate. JC
-        sign_py = 'C:\\buildscripts\\code-signing\\sign.py'
+        sign_py = os.path.expandvars("${SIGN}")
+        if not sign_py or sign_py == "${SIGN}":
+            sign_py = 'C:\\buildscripts\\code-signing\\sign.py'
+        python = os.path.expandvars("${PYTHON}")
+        if not python or python == "${PYTHON}":
+            python = 'python'
         if os.path.exists(sign_py):
-            self.run_command(sign_py + ' ' + self.dst_path_of(installer_file))
+            self.run_command("%s %s %s" % (python, sign_py self.dst_path_of(installer_file)))
         else:
             print "Skipping code signing,", sign_py, "does not exist"
         self.created_path(self.dst_path_of(installer_file))