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#!/usr/bin/python
# Copyright (C) 2018 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Drives mojom typemapping generator.
Usage:
% python libchrome_tools/mojom_generate_type_mappings.py \
--output ${output_type_mapping_file_path} \
${list of .typemap files}
"""
import argparse
import os
import subprocess
import sys
from build import gn_helpers
_GENERATE_TYPE_MAPPINGS_PATH = os.path.join(
os.path.dirname(__file__),
'../mojo/public/tools/bindings/generate_type_mappings.py')
def _read_typemap_config(path):
"""Reads .typemap file.
Args:
path: File path to the .typemap location.
Returns:
A dictionary holding values in .typemap file.
"""
with open(path) as f:
# gn_helpers does not handle comment lines.
content = [line for line in f if not line.strip().startswith('#')]
return gn_helpers.FromGNArgs(''.join(content))
def _generate_type_mappings(input_paths, output):
"""Generates __type_mappings file from given .typemap files.
Builds a command line to run generate_type_mappings.py, and executes it.
Args:
input_paths: a list of file paths for .typemap files.
output: a path to output __type_mappings file.
"""
command = [sys.executable, _GENERATE_TYPE_MAPPINGS_PATH, '--output', output]
# TODO(hidehiko): Add dependency handling.
for path in input_paths:
typemap_config = _read_typemap_config(path)
command.append('--start-typemap')
for public_header in typemap_config.get('public_headers', []):
command.append('public_headers=' + public_header)
for traits_header in typemap_config.get('traits_headers', []):
command.append('traits_headers=' + traits_header)
for type_mapping in typemap_config.get('type_mappings', []):
command.append('type_mappings=' + type_mapping)
subprocess.check_call(command)
def _parse_args():
parser = argparse.ArgumentParser()
parser.add_argument('--output', help='Output file path')
parser.add_argument('input_paths', metavar="INPUT-PATH", nargs='+',
help='Input typemap files.')
return parser.parse_args()
def main():
args = _parse_args()
_generate_type_mappings(args.input_paths, args.output)
if __name__ == '__main__':
main()
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