Teach ninja to handle output directories outside the source dir.

pylib/gyp/generator/make.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.
 
 # Notes:
 #
 # This is all roughly based on the Makefile system used by the Linux
 # kernel, but is a non-recursive make -- we put the entire dependency
 # graph in front of make and let it figure it out.
 #
@@ skipping 601 matching lines @@
     return path
   if os.path.isabs(path):
     return path
   return srcdir_prefix + path
 
 
 def QuoteSpaces(s, quote=r'\ '):
   return s.replace(' ', quote)
 
 
-def InvertRelativePath(path):
-  """Given a relative path like foo/bar, return the inverse relative path:
-  the path from the relative path back to the origin dir.
-
-  E.g. os.path.normpath(os.path.join(path, InvertRelativePath(path)))
-  should always produce the empty string."""
-
-  if not path:
-    return path
-  # Only need to handle relative paths into subdirectories for now.
-  assert '..' not in path, path
-  depth = len(path.split(os.path.sep))
-  return os.path.sep.join(['..'] * depth)
-
-
 # Map from qualified target to path to output.
 target_outputs = {}
 # Map from qualified target to any linkable output.  A subset
 # of target_outputs.  E.g. when mybinary depends on liba, we want to
 # include liba in the linker line; when otherbinary depends on
 # mybinary, we just want to build mybinary first.
 target_link_deps = {}
 
 
 class MakefileWriter:
@@ skipping 763 matching lines @@
     target_postbuilds = {}
     if self.type != 'none':
       for configname in sorted(configs.keys()):
         config = configs[configname]
         if self.flavor == 'mac':
           ldflags = self.xcode_settings.GetLdflags(configname,
               generator_default_variables['PRODUCT_DIR'],
               lambda p: Sourceify(self.Absolutify(p)))
 
           # TARGET_POSTBUILDS_$(BUILDTYPE) is added to postbuilds later on.
-          gyp_to_build = InvertRelativePath(self.path)
+          gyp_to_build = gyp.common.InvertRelativePath(self.path)
           target_postbuild = self.xcode_settings.GetTargetPostbuilds(
               configname,
               QuoteSpaces(os.path.normpath(os.path.join(gyp_to_build,
                                                         self.output))),
               QuoteSpaces(os.path.normpath(os.path.join(gyp_to_build,
                                                         self.output_binary))))
           if target_postbuild:
             target_postbuilds[configname] = target_postbuild
         else:
           ldflags = config.get('ldflags', [])
@@ skipping 713 matching lines @@
     root_makefile.write("endif\n")
   root_makefile.write('\n')
 
   if (not generator_flags.get('standalone')
       and generator_flags.get('auto_regeneration', True)):
     WriteAutoRegenerationRule(params, root_makefile, makefile_name, build_files)
 
   root_makefile.write(SHARED_FOOTER)
 
   root_makefile.close()