80 lines
2.1 KiB
Python
80 lines
2.1 KiB
Python
## Generic Parts
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# These functions are providing the functionality to load
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# arbitrary configuration files.
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#
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# They can be imported by other code (see `ldap_config.py` for an example).
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from os.path import abspath, isfile
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from os import scandir
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import importlib.util
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import sys
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def _filename(f):
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return f.name
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def _import(module_name, path, loaded_configurations):
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spec = importlib.util.spec_from_file_location('', path)
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module = importlib.util.module_from_spec(spec)
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spec.loader.exec_module(module)
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sys.modules[module_name] = module
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loaded_configurations.insert(0, module)
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print(f"🧬 loaded config '{path}'")
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def read_configurations(config_module, config_dir, main_config):
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loaded_configurations = []
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main_config_path = abspath(f'{config_dir}/{main_config}.py')
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if isfile(main_config_path):
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_import(f'{config_module}.{main_config}', main_config_path, loaded_configurations)
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else:
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print(f"⚠️ Main configuration '{main_config_path}' not found.")
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with scandir(config_dir) as it:
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for f in sorted(it, key=_filename):
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if not f.is_file():
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continue
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if f.name.startswith('__'):
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continue
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if not f.name.endswith('.py'):
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continue
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if f.name == f'{config_dir}.py':
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continue
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module_name = f"{config_module}.{f.name[:-len('.py')]}".replace(".", "_")
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_import(module_name, f.path, loaded_configurations)
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if len(loaded_configurations) == 0:
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print(f"‼️ No configuration files found in '{config_dir}'.")
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raise ImportError(f"No configuration files found in '{config_dir}'.")
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return loaded_configurations
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## Specific Parts
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# This section's code actually loads the various configuration files
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# into the module with the given name.
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# It contains the logic to resolve arbitrary configuration options by
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# levaraging dynamic programming using `__getattr__`.
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_loaded_configurations = read_configurations(
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config_dir = '/etc/netbox/config/',
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config_module = 'netbox.configuration',
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main_config = 'configuration')
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def __getattr__(name):
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for config in _loaded_configurations:
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try:
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return getattr(config, name)
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except:
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pass
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raise AttributeError
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