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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.
"""Generate java source files from protobuf files.
This is a helper file for the genproto_java action in protoc_java.gypi.
It performs the following steps:
1. Deletes all old sources (ensures deleted classes are not part of new jars).
2. Creates source directory.
3. Generates Java files using protoc (output into either --java-out-dir or
--srcjar).
4. Creates a new stamp file.
"""
import os
import optparse
import shutil
import subprocess
import sys
sys.path.append(os.path.join(os.path.dirname(__file__), "android", "gyp"))
from util import build_utils
def main(argv):
parser = optparse.OptionParser()
build_utils.AddDepfileOption(parser)
parser.add_option("--protoc", help="Path to protoc binary.")
parser.add_option("--proto-path", help="Path to proto directory.")
parser.add_option("--java-out-dir",
help="Path to output directory for java files.")
parser.add_option("--srcjar", help="Path to output srcjar.")
parser.add_option("--stamp", help="File to touch on success.")
parser.add_option("--nano",
help="Use to generate nano protos.", action='store_true')
options, args = parser.parse_args(argv)
build_utils.CheckOptions(options, parser, ['protoc', 'proto_path'])
if not options.java_out_dir and not options.srcjar:
print('One of --java-out-dir or --srcjar must be specified.')
return 1
with build_utils.TempDir() as temp_dir:
if options.nano:
# Specify arguments to the generator.
generator_args = ['optional_field_style=reftypes',
'store_unknown_fields=true']
out_arg = '--javanano_out=' + ','.join(generator_args) + ':' + temp_dir
else:
out_arg = '--java_out=' + temp_dir
# Check if all proto files (which are listed in the args) are opting to
# use the lite runtime, otherwise we'd have to include the much heavier
# regular proto runtime in Chrome.
# TODO(jkrcal): Replace this check by '--java_lite_out=' for the out_arg
# above once this works on the master branch of the protobuf library,
# expected in version 4.0 (see https://crbug.com/800281).
for proto_file in args:
if not 'LITE_RUNTIME' in open(proto_file).read():
raise Exception(
'Chrome only supports lite protos. Please add "optimize_for = '
'LITE_RUNTIME" to your proto file to enable the lite runtime.')
# Generate Java files using protoc.
build_utils.CheckOutput(
[options.protoc, '--proto_path', options.proto_path, out_arg]
+ args)
if options.java_out_dir:
build_utils.DeleteDirectory(options.java_out_dir)
shutil.copytree(temp_dir, options.java_out_dir)
else:
build_utils.ZipDir(options.srcjar, temp_dir)
if options.depfile:
assert options.srcjar
deps = args + [options.protoc]
build_utils.WriteDepfile(options.depfile, options.srcjar, deps)
if options.stamp:
build_utils.Touch(options.stamp)
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
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