win ninja: Refactor manifest generate and embed to be 1-pass

pylib/gyp/common.py

 # Copyright (c) 2012 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 __future__ import with_statement
 
 import errno
 import filecmp
 import os.path
 import re
@@ skipping 373 matching lines @@
             os.remove(filename)
           os.rename(self.tmp_path, filename)
       except Exception:
         # Don't leave turds behind.
         os.unlink(self.tmp_path)
         raise
 
   return Writer()
 
 
+def EnsureDirExists(path):
+  """Make sure the directory for |path| exists."""
+  try:
+    os.makedirs(os.path.dirname(path))
+  except OSError:
+    pass
+
+
 def GetFlavor(params):
   """Returns |params.flavor| if it's set, the system's default flavor else."""
   flavors = {
     'cygwin': 'win',
     'win32': 'win',
     'darwin': 'mac',
   }
 
   if 'flavor' in params:
     return params['flavor']
@@ skipping 100 matching lines @@
       return
     visited.add(node)
     visiting.add(node)
     for neighbor in get_edges(node):
       Visit(neighbor)
     visiting.remove(node)
     ordered_nodes.insert(0, node)
   for node in sorted(graph):
     Visit(node)
   return ordered_nodes