Raise an error when a configuration dictionary contains invalid keys....

pylib/gyp/input.py

Index: pylib/gyp/input.py
===================================================================
--- pylib/gyp/input.py	(revision 826)
+++ pylib/gyp/input.py	(working copy)
@@ -95,6 +95,20 @@
 ]
 non_configuration_keys = []
 
+# Keys that do not belong inside a configuration dictionary.
+invalid_configuration_keys = [
+  'actions',
+  'all_dependent_settings',
+  'configurations',
+  'dependencies',
+  'direct_dependent_settings',
+  'libraries',
+  'link_settings',
+  'sources',
+  'target_name',
+  'type',
+]
+
 # Controls how the generator want the build file paths.
 absolute_build_file_paths = False
 
@@ -1784,7 +1798,16 @@
   for key in delete_keys:
     del target_dict[key]
 
+  # Check the configurations to see if they contain invalid keys.
+  for configuration in target_dict['configurations'].keys():
+    configuration_dict = target_dict['configurations'][configuration]
+    for key in configuration_dict.keys():
+      if key in invalid_configuration_keys:
+        raise KeyError, ('%s not allowed in the %s configuration, found in '
+                         'target %s' % (key, configuration, target))
 
+
+
 def ProcessListFiltersInDict(name, the_dict):
   """Process regular expression and exclusion-based filters on lists.