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#!/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 optparse
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):
parser = optparse.OptionParser()
parser.add_option('--include', dest='extra_header',
help='The extra header to include. This must be specified '
'along with --protobuf.')
parser.add_option('--protobuf', dest='generated_header',
help='The c++ protobuf header to add the extra header to. '
'This must be specified along with --include.')
(options, args) = parser.parse_args(sys.argv)
if len(args) < 2:
return 1
# Run what is hopefully protoc.
ret = subprocess.call(args[1:])
if ret != 0:
return ret
# protoc succeeded, check to see if the generated cpp header needs editing.
if not options.extra_header or not options.generated_header:
return 0
return ModifyHeader(options.generated_header, options.extra_header)
if __name__ == '__main__':
sys.exit(main(sys.argv))
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