OVMS3-idf/tools/kconfig_new/prepare_kconfig_files.py

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