build/protoc_java.py

   1 #!/usr/bin/env python
   2 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 """Generate java source files from protobufs
   7
   8 Usage:
   9     protoc_java.py {protoc} {proto_path} {java_out} {stamp_file} {proto_files}
  10
  11 This is a helper file for the genproto_java action in protoc_java.gypi.
  12
  13 It performs the following steps:
  14 1. Deletes all old sources (ensures deleted classes are not part of new jars).
  15 2. Creates source directory.
  16 3. Generates Java files using protoc.
  17 4. Creates a new stamp file.
  18 """
  19
  20 import os
  21 import shutil
  22 import subprocess
  23 import sys
  24
  25 def main(argv):
  26   if len(argv) < 5:
  27     usage()
  28     return 1
  29
  30   protoc_path, proto_path, java_out, stamp_file = argv[1:5]
  31   proto_files = argv[5:]
  32
  33   # Delete all old sources
  34   if os.path.exists(java_out):
  35     shutil.rmtree(java_out)
  36
  37   # Create source directory
  38   os.makedirs(java_out)
  39
  40   # Generate Java files using protoc
  41   ret = subprocess.call(
  42       [protoc_path, '--proto_path', proto_path, '--java_out', java_out]
  43       + proto_files)
  44
  45   if ret == 0:
  46     # Create a new stamp file
  47     with file(stamp_file, 'a'):
  48       os.utime(stamp_file, None)
  49
  50   return ret
  51
  52 def usage():
  53   print(__doc__);
  54
  55 if __name__ == '__main__':
  56   sys.exit(main(sys.argv))