Makes copy_ex handle directories

build/android/gyp/copy_ex.py

 #!/usr/bin/env python
 #
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Copies files to a directory."""
 
 import optparse
+import os
 import shutil
 import sys
 
 from util import build_utils
 
 
+def _get_all_files(base):
+  """Returns a list of all the files in |base|. Each entry is relative to the
+  last path entry of |base|."""
+  result = []
+  dirname = os.path.dirname(base)
+  for root, _, files in os.walk(base):
+    result.extend([os.path.join(root[len(dirname):], f) for f in files])
+  return result
+
+
 def main(args):
   args = build_utils.ExpandFileArgs(args)
 
   parser = optparse.OptionParser()
   build_utils.AddDepfileOption(parser)
 
   parser.add_option('--dest', help='Directory to copy files to.')
   parser.add_option('--files', action='append',
                     help='List of files to copy.')
   parser.add_option('--clear', action='store_true',
                     help='If set, the destination directory will be deleted '
                     'before copying files to it. This is highly recommended to '
                     'ensure that no stale files are left in the directory.')
   parser.add_option('--stamp', help='Path to touch on success.')
 
   options, _ = parser.parse_args(args)
 
   if options.clear:
     build_utils.DeleteDirectory(options.dest)
     build_utils.MakeDirectory(options.dest)
 
   files = []
   for file_arg in options.files:
     files += build_utils.ParseGypList(file_arg)
 
+  deps = []
+
   for f in files:
-    shutil.copy(f, options.dest)
+    if os.path.isdir(f):
+      if not options.clear:
+        print ('To avoid stale files you must use --clear when copying '
+               'directories')
+        sys.exit(-1)
+      shutil.copytree(f, os.path.join(options.dest, os.path.basename(f)))
+      deps.extend(_get_all_files(f))
+    else:
+      shutil.copy(f, options.dest)
+      deps.append(f)
 
   if options.depfile:
     build_utils.WriteDepfile(
         options.depfile,
-        files + build_utils.GetPythonDependencies())
+        deps + build_utils.GetPythonDependencies())
 
   if options.stamp:
     build_utils.Touch(options.stamp)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))