On Windows, fail if there are missing files specified in the project.

gyp_skia

 #!/usr/bin/python
 
 # Copyright 2011 The Android Open Source Project
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script is a wrapper which invokes gyp with the correct --depth argument,
 # and supports the automatic regeneration of build files if all.gyp is
 # changed (Linux-only).
@@ skipping 108 matching lines @@
 
   # Tell gyp to write the build files into output_dir.
   args.extend(['--generator-output', os.path.abspath(get_output_dir())])
 
   # Tell ninja to write its output into the same directory.
   args.extend(['-Goutput_dir=.'])
 
   # By default, we build 'most' instead of 'all' or 'everything'. See skia.gyp.
   args.extend(['-Gdefault_target=most'])
 
+  # Fail if any files specified in the project are missing
+  if sys.platform.startswith('win'):
+    ENVVAR_GYP_GENERATOR_FLAGS = 'GYP_GENERATOR_FLAGS'

[epoger, 2014/06/04 17:09:44]

please move this definition to the top near ENVVAR_GYP_GENERATORS

+    gyp_generator_flags = os.getenv(ENVVAR_GYP_GENERATOR_FLAGS, '')
+    if not 'msvs_error_on_missing_sources' in gyp_generator_flags:
+      os.environ[ENVVAR_GYP_GENERATOR_FLAGS] = (
+          gyp_generator_flags + ' msvs_error_on_missing_sources=1')
+      
   print 'Updating projects from gyp files...'
   sys.stdout.flush()
 
   if '--dry-run' in args:
     args.remove('--dry-run')
     print gyp_source_dir, ' '.join(args)
   else:
     # Off we go...
     sys.exit(gyp.main(args))