CrOS: Convert MediaTransferProtocolDaemonClient to use protobufs.

tools/protoc_wrapper/protoc_wrapper.py

+#!/usr/bin/env python
+# Copyright (c) 2012 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.
+
+"""A simple wrapper for protoc to add includes in generated cpp headers."""
+
+import subprocess
+import sys
+
+PROTOC_INCLUDE_POINT = '// @@protoc_insertion_point(includes)\n'
+
+def ModifyHeader(header_file, extra_header):
+  """Adds |extra_header| to |header_file|. Returns 0 on success.
+
+  |extra_header| is the name of the header file to include.
+  |header_file| is a generated protobuf cpp header.
+  """
+  include_point_found = False
+  header_contents = []
+  with open(header_file) as f:
+    for line in f:
+      header_contents.append(line)
+      if line == PROTOC_INCLUDE_POINT:
+        extra_header_msg = '#include "%s"\n' % extra_header
+        header_contents.append(extra_header_msg)
+        include_point_found = True;
+  if not include_point_found:
+    return 1
+
+  with open(header_file, 'wb') as f:
+    f.write(''.join(header_contents))
+  return 0
+
+
+def main(argv):
+  # Expected to be called as:
+  # protoc_wrapper header_to_include:/path/to/cpp.pb.h /path/to/protoc \
+  #    [protoc args]
+  if len(argv) < 3:
+    return 1
+
+  # Parse the first argument:
+  combined_wrapper_arg = argv[1]
+  if combined_wrapper_arg.count(':') > 1:
+    return 1
+  (extra_header, generated_header) = combined_wrapper_arg.split(':')
+  if not generated_header:
+    return 1
+
+  # Run what is hopefully protoc.
+  try:
+    ret = subprocess.call(argv[2:])
+    if ret != 0:
+      return ret
+  except:
+    return 1
+
+  # protoc succeeded, check to see if the generated cpp header needs editing.
+  if not extra_header:
+    return 0
+  return ModifyHeader(generated_header, extra_header)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))