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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 the action script for the proto_java_library template.
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.
"""
from __future__ import print_function
import argparse
import os
import shutil
import subprocess
import sys
sys.path.append(os.path.join(os.path.dirname(__file__), 'android', 'gyp'))
from util import build_utils
def _HasJavaPackage(proto_lines):
return any(line.strip().startswith('option java_package')
for line in proto_lines)
def _EnforceJavaPackage(proto_srcs):
for proto_path in proto_srcs:
with open(proto_path) as in_proto:
if not _HasJavaPackage(in_proto.readlines()):
raise Exception('Proto files for java must contain a "java_package" '
'line: {}'.format(proto_path))
def main(argv):
parser = argparse.ArgumentParser()
build_utils.AddDepfileOption(parser)
parser.add_argument('--protoc', required=True, help='Path to protoc binary.')
parser.add_argument('--proto-path',
required=True,
help='Path to proto directory.')
parser.add_argument('--java-out-dir',
help='Path to output directory for java files.')
parser.add_argument('--srcjar', help='Path to output srcjar.')
parser.add_argument('--stamp', help='File to touch on success.')
parser.add_argument(
'--import-dir',
action='append',
default=[],
help='Extra import directory for protos, can be repeated.')
parser.add_argument('protos', nargs='+', help='proto source files')
options = parser.parse_args(argv)
if not options.java_out_dir and not options.srcjar:
raise Exception('One of --java-out-dir or --srcjar must be specified.')
_EnforceJavaPackage(options.protos)
with build_utils.TempDir() as temp_dir:
out_arg = '--java_out=lite:' + temp_dir
proto_path_args = ['--proto_path', options.proto_path]
for path in options.import_dir:
proto_path_args += ["--proto_path", path]
# Generate Java files using protoc.
build_utils.CheckOutput(
[options.protoc] + proto_path_args + [out_arg] + options.protos,
# protoc generates superfluous warnings about LITE_RUNTIME deprecation
# even though we are using the new non-deprecated method.
stderr_filter=lambda output: build_utils.FilterLines(
output, '|'.join([r'optimize_for = LITE_RUNTIME', r'java/lite\.md'])
))
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 = options.protos + [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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