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 protobuf files.
   7
   8 This is a helper file for the genproto_java action in protoc_java.gypi.
   9
  10 It performs the following steps:
  11 1. Deletes all old sources (ensures deleted classes are not part of new jars).
  12 2. Creates source directory.
  13 3. Generates Java files using protoc (output into either --java-out-dir or
  14    --srcjar).
  15 4. Creates a new stamp file.
  16 """
  17
  18 import os
  19 import optparse
  20 import shutil
  21 import subprocess
  22 import sys
  23
  24 sys.path.append(os.path.join(os.path.dirname(__file__), "android", "gyp"))
  25 from util import build_utils
  26
  27 def main(argv):
  28   parser = optparse.OptionParser()
  29   build_utils.AddDepfileOption(parser)
  30   parser.add_option("--protoc", help="Path to protoc binary.")
  31   parser.add_option("--proto-path", help="Path to proto directory.")
  32   parser.add_option("--java-out-dir",
  33       help="Path to output directory for java files.")
  34   parser.add_option("--srcjar", help="Path to output srcjar.")
  35   parser.add_option("--stamp", help="File to touch on success.")
  36   options, args = parser.parse_args(argv)
  37
  38   build_utils.CheckOptions(options, parser, ['protoc', 'proto_path'])
  39   if not options.java_out_dir and not options.srcjar:
  40     print 'One of --java-out-dir or --srcjar must be specified.'
  41     return 1
  42
  43   with build_utils.TempDir() as temp_dir:
  44     # Specify arguments to the generator.
  45     generator_args = ['optional_field_style=reftypes',
  46                       'store_unknown_fields=true']
  47     out_arg = '--javanano_out=' + ','.join(generator_args) + ':' + temp_dir
  48     # Generate Java files using protoc.
  49     build_utils.CheckOutput(
  50         [options.protoc, '--proto_path', options.proto_path, out_arg]
  51         + args)
  52
  53     if options.java_out_dir:
  54       build_utils.DeleteDirectory(options.java_out_dir)
  55       shutil.copytree(temp_dir, options.java_out_dir)
  56     else:
  57       build_utils.ZipDir(options.srcjar, temp_dir)
  58
  59   if options.depfile:
  60     build_utils.WriteDepfile(
  61         options.depfile,
  62         args + [options.protoc] + build_utils.GetPythonDependencies())
  63
  64   if options.stamp:
  65     build_utils.Touch(options.stamp)
  66
  67 if __name__ == '__main__':
  68   sys.exit(main(sys.argv[1:]))