File size: 6,974 Bytes
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import json
import os
from pathlib import Path
from typing import Any
PROJECT_ROOT = Path(__file__).resolve().parent.parent
CONFIG_PATH_ENV_NAMES = (
"S1_DR_CONFIG_JSON",
"DR_SKILLS_CONFIG_JSON",
"CONFIG_JSON_PATH",
)
class ConfigSource:
def get(self, key: str, default: Any = None) -> Any:
raise NotImplementedError
class JsonConfigSource(ConfigSource):
def __init__(self, paths: list[Path]):
self.paths = paths
self._loaded = False
self._data: dict[str, Any] = {}
self.loaded_path: Path | None = None
def _load(self) -> None:
if self._loaded:
return
self._loaded = True
for path in self.paths:
if not path or not path.is_file():
continue
with path.open("r", encoding="utf-8") as handle:
data = json.load(handle)
if not isinstance(data, dict):
raise ValueError(f"JSON config must be an object: {path}")
self._data = data
self.loaded_path = path
return
def get(self, key: str, default: Any = None) -> Any:
self._load()
return self._data.get(key, default)
class EnvConfigSource(ConfigSource):
def __init__(self, defaults: dict[str, Any]):
self.defaults = defaults
def get(self, key: str, default: Any = None) -> Any:
for env_name in _env_names_for_key(key):
raw_value = os.environ.get(env_name)
if raw_value is None:
continue
expected = self.defaults.get(key, default)
return _coerce_value(raw_value, expected)
return default
class PythonConfigSource(ConfigSource):
def __init__(self, module_name: str):
self.module_name = module_name
self._module = None
def _load_module(self, force_reload: bool = False):
if self._module is None:
self._module = importlib.import_module(self.module_name)
elif force_reload:
self._module = importlib.reload(self._module)
return self._module
def reload_module(self):
module = self._load_module()
stale_keys = [
name
for name, value in module.__dict__.items()
if name.isupper() and not name.startswith("_") and not callable(value)
]
for name in stale_keys:
module.__dict__.pop(name, None)
self._module = importlib.reload(module)
return self._module
def get(self, key: str, default: Any = None) -> Any:
module = self._load_module()
return getattr(module, key, default)
def keys(self) -> tuple[str, ...]:
module = self._load_module()
return tuple(
name
for name, value in module.__dict__.items()
if name.isupper() and not name.startswith("_") and not callable(value)
)
class ConfigManager:
def __init__(self) -> None:
self._defaults_source = PythonConfigSource("utils.config")
self._defaults_source.reload_module()
self._keys = self._defaults_source.keys()
self._defaults = self._load_defaults()
self._sources = [
JsonConfigSource(_discover_json_paths()),
EnvConfigSource(self._defaults),
self._defaults_source,
]
@property
def keys(self) -> tuple[str, ...]:
return self._keys
def _load_defaults(self) -> dict[str, Any]:
defaults: dict[str, Any] = {}
for key in self._keys:
defaults[key] = self._defaults_source.get(key)
return defaults
def get(self, key: str) -> Any:
fallback = self._defaults.get(key)
for source in self._sources:
value = source.get(key, None)
if value is not None:
return value
return fallback
def as_dict(self) -> dict[str, Any]:
return {key: self.get(key) for key in self._keys}
def _discover_json_paths() -> list[Path]:
paths: list[Path] = []
seen: set[Path] = set()
for env_name in CONFIG_PATH_ENV_NAMES:
raw_path = os.environ.get(env_name)
if raw_path:
candidate = Path(raw_path).expanduser()
if not candidate.is_absolute():
candidate = PROJECT_ROOT / candidate
candidate = candidate.resolve(strict=False)
if candidate not in seen:
paths.append(candidate)
seen.add(candidate)
for candidate in (
PROJECT_ROOT / "config.local.json",
PROJECT_ROOT / "config.json",
PROJECT_ROOT / "utils" / "config" / "config.local.json",
PROJECT_ROOT / "utils" / "config" / "config.json",
):
candidate = candidate.resolve(strict=False)
if candidate not in seen:
paths.append(candidate)
seen.add(candidate)
return paths
def _env_names_for_key(key: str) -> tuple[str, ...]:
return (
key,
f"S1_DR_{key}",
f"DR_SKILLS_{key}",
)
def _coerce_value(raw_value: str, expected: Any) -> Any:
if expected is None:
return _parse_json_like(raw_value)
if isinstance(expected, bool):
lowered = raw_value.strip().lower()
if lowered in {"1", "true", "yes", "on"}:
return True
if lowered in {"0", "false", "no", "off"}:
return False
return bool(raw_value)
if isinstance(expected, int) and not isinstance(expected, bool):
return int(raw_value)
if isinstance(expected, float):
return float(raw_value)
if isinstance(expected, list):
parsed = _parse_json_like(raw_value)
if isinstance(parsed, list):
return parsed
return [item.strip() for item in raw_value.split(",") if item.strip()]
if isinstance(expected, dict):
parsed = _parse_json_like(raw_value)
if not isinstance(parsed, dict):
raise ValueError("Expected a JSON object for config override")
return parsed
return raw_value
def _parse_json_like(raw_value: str) -> Any:
value = raw_value.strip()
if not value:
return raw_value
if value[0] in "[{\"" or value in {"true", "false", "null"}:
try:
return json.loads(value)
except json.JSONDecodeError:
return raw_value
try:
return json.loads(value)
except json.JSONDecodeError:
return raw_value
_CONFIG_MANAGER = ConfigManager()
CONFIG_KEYS = _CONFIG_MANAGER.keys
def get_config_keys() -> tuple[str, ...]:
return _CONFIG_MANAGER.keys
def get_config_value(key: str) -> Any:
return _CONFIG_MANAGER.get(key)
def get_config_dict() -> dict[str, Any]:
return _CONFIG_MANAGER.as_dict()
def reload_config() -> dict[str, Any]:
global _CONFIG_MANAGER, CONFIG_KEYS
_CONFIG_MANAGER = ConfigManager()
CONFIG_KEYS = _CONFIG_MANAGER.keys
return get_config_dict()
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