Don't allow empty string as first argument of action.

pylib/gyp/input.py

 # Copyright (c) 2011 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from compiler.ast import Const
 from compiler.ast import Dict
 from compiler.ast import Discard
 from compiler.ast import List
 from compiler.ast import Module
 from compiler.ast import Node
@@ skipping 2134 matching lines @@
   '''Validates the inputs to the actions in a target.'''
   target_name = target_dict.get('target_name')
   actions = target_dict.get('actions', [])
   for action in actions:
     action_name = action.get('action_name')
     if not action_name:
       raise Exception("Anonymous action in target %s.  "
                       "An action must have an 'action_name' field." %
                       target_name)
     inputs = action.get('inputs', [])
+    action_command = action.get('action')
+    if action_command:

[(unused - use chromium), 2012/02/23 01:55:19]

if action_command and not action-command[0]:
  raise...

+      if action_command[0] == '':
+        raise Exception("Empty action as command in target %s. " %
+                        target_name)
 
 
 def ValidateRunAsInTarget(target, target_dict, build_file):
   target_name = target_dict.get('target_name')
   run_as = target_dict.get('run_as')
   if not run_as:
     return
   if not isinstance(run_as, dict):
     raise Exception("The 'run_as' in target %s from file %s should be a "
                     "dictionary." %
@@ skipping 208 matching lines @@
     ValidateRunAsInTarget(target, target_dict, build_file)
     ValidateActionsInTarget(target, target_dict, build_file)
 
   # Generators might not expect ints.  Turn them into strs.
   TurnIntIntoStrInDict(data)
 
   # TODO(mark): Return |data| for now because the generator needs a list of
   # build files that came in.  In the future, maybe it should just accept
   # a list, and not the whole data dict.
   return [flat_list, targets, data]