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97 lines
3.8 KiB
Python
97 lines
3.8 KiB
Python
#!/usr/bin/env python
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#
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# Copyright 2019 Espressif Systems (Shanghai) PTE LTD
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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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from __future__ import print_function, unicode_literals
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import argparse
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import json
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import sys
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from io import open
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def _prepare_source_files(env_dict):
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"""
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Prepares source files which are sourced from the main Kconfig because upstream kconfiglib doesn't support sourcing
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a file list. The inputs are the same environment variables which are used by kconfiglib:
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- COMPONENT_KCONFIGS,
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- COMPONENT_KCONFIGS_SOURCE_FILE,
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- COMPONENT_KCONFIGS_PROJBUILD,
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- COMPONENT_KCONFIGS_PROJBUILD_SOURCE_FILE.
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The outputs are written into files pointed by the value of
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- COMPONENT_KCONFIGS_SOURCE_FILE,
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- COMPONENT_KCONFIGS_PROJBUILD_SOURCE_FILE,
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After running this function, COMPONENT_KCONFIGS_SOURCE_FILE and COMPONENT_KCONFIGS_PROJBUILD_SOURCE_FILE will
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contain a list of source statements based on the content of COMPONENT_KCONFIGS and COMPONENT_KCONFIGS_PROJBUILD,
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respectively. For example, if COMPONENT_KCONFIGS="var1 var2 var3" and
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COMPONENT_KCONFIGS_SOURCE_FILE="/path/file.txt" then the content of file /path/file.txt will be:
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source "var1"
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source "var2"
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source "var3"
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"""
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def _dequote(var):
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return var[1:-1] if len(var) > 0 and (var[0], var[-1]) == ('"',) * 2 else var
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def _write_source_file(config_var, config_file):
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new_content = '\n'.join(['source "{}"'.format(path) for path in _dequote(config_var).split()])
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try:
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with open(config_file, 'r', encoding='utf-8') as f:
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old_content = f.read()
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except Exception:
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# File doesn't exist or other issue
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old_content = None
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# "None" ensures that it won't be equal to new_content when it is empty string because files need to be
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# created for empty environment variables as well
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if new_content != old_content:
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# write or rewrite file only if it is necessary
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with open(config_file, 'w', encoding='utf-8') as f:
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f.write(new_content)
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try:
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_write_source_file(env_dict['COMPONENT_KCONFIGS'], env_dict['COMPONENT_KCONFIGS_SOURCE_FILE'])
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_write_source_file(env_dict['COMPONENT_KCONFIGS_PROJBUILD'], env_dict['COMPONENT_KCONFIGS_PROJBUILD_SOURCE_FILE'])
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except KeyError as e:
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print('Error:', e, 'is not defined!')
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sys.exit(1)
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(description='Kconfig Source File Generator')
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parser.add_argument('--env', action='append', default=[],
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help='Environment value', metavar='NAME=VAL')
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parser.add_argument('--env-file', type=argparse.FileType('r'),
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help='Optional file to load environment variables from. Contents '
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'should be a JSON object where each key/value pair is a variable.')
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args = parser.parse_args()
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try:
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env = dict([(name, value) for (name, value) in (e.split('=', 1) for e in args.env)])
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except ValueError:
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print('--env arguments must each contain =.')
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sys.exit(1)
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if args.env_file is not None:
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env.update(json.load(args.env_file))
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_prepare_source_files(env)
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