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