Matthias Blankertz
c931c8fe8e
Load a config.json file from the root of the littlefs flash filesystem. Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
# SPDX-License-Identifier: MIT
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# Copyright (c) 2025 Matthias Blankertz <matthias@blankertz.org>
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from errno import ENOENT
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import json
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import os
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class Configuration:
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DEFAULT_CONFIG = {
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}
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def __init__(self, config_path='/config.json'):
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self.config_path = config_path
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try:
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with open(self.config_path, 'r') as conf_file:
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self.config = json.load(conf_file)
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except OSError as ex:
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if ex.errno == ENOENT:
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self.config = Configuration.DEFAULT_CONFIG
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self._save()
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else:
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raise
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except ValueError as ex:
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print(f"Warning: Could not load configuration {self.config_path}:\n{ex}")
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self._move_config_to_backup()
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self.config = Configuration.DEFAULT_CONFIG
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def _move_config_to_backup(self):
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# Remove old backup
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try:
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os.remove(self.config_path + '.bup')
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os.rename(self.config_path, self.config_path + '.bup')
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except OSError as ex:
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if ex.errno != ENOENT:
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raise
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os.sync()
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def _save(self):
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with open(self.config_path + '.new', 'w') as conf_file:
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json.dump(self.config, conf_file)
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self._move_config_to_backup()
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os.rename(self.config_path + '.new', self.config_path)
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os.sync()
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