app/liteyuki/config.py
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添加新的配置加载器,支持从YAML、TOML、JSON和环境变量加载配置,并修改默认主机地址
2024-12-02 21:46:29 +08:00

179 lines
5.3 KiB
Python

"""
该模块用于常用配置文件的加载
多配置文件编写原则:
1. 尽量不要冲突: 一个键不要多次出现
2. 分工明确: 每个配置文件给一个或一类服务提供配置
3. 扁平化编写: 配置文件尽量扁平化,不要出现过多的嵌套
4. 注意冲突时的优先级: 项目目录下的配置文件优先级高于config目录下的配置文件
5. 请不要将需要动态加载的内容写入配置文件,你应该使用其他储存方式
"""
import os
import json
import copy
import toml
import yaml
from typing import Any
from liteyuki.log import logger
_SUPPORTED_CONFIG_FORMATS = (".yaml", ".yml", ".json", ".toml")
def flat_config(config: dict[str, Any]) -> dict[str, Any]:
"""
扁平化配置文件
{a:{b:{c:1}}} -> {"a.b.c": 1}
Args:
config: 配置项目
Returns:
扁平化后的配置文件,但也包含原有的键值对
"""
new_config = copy.deepcopy(config)
for key, value in config.items():
if isinstance(value, dict):
for k, v in flat_config(value).items():
new_config[f"{key}.{k}"] = v
return new_config
def load_from_yaml(file_: str) -> dict[str, Any]:
"""
Load config from yaml file
"""
logger.debug(f"Loading YAML config from {file_}")
config = yaml.safe_load(open(file_, "r", encoding="utf-8"))
return flat_config(config if config is not None else {})
def load_from_json(file_: str) -> dict[str, Any]:
"""
Load config from json file
"""
logger.debug(f"Loading JSON config from {file_}")
config = json.load(open(file_, "r", encoding="utf-8"))
return flat_config(config if config is not None else {})
def load_from_toml(file_: str) -> dict[str, Any]:
"""
Load config from toml file
"""
logger.debug(f"Loading TOML config from {file_}")
config = toml.load(open(file_, "r", encoding="utf-8"))
return flat_config(config if config is not None else {})
def load_from_files(*files: str, no_warning: bool = False) -> dict[str, Any]:
"""
从指定文件加载配置项,会自动识别文件格式
默认执行扁平化选项
"""
config = {}
for file in files:
if os.path.exists(file):
if file.endswith((".yaml", "yml")):
config.update(load_from_yaml(file))
elif file.endswith(".json"):
config.update(load_from_json(file))
elif file.endswith(".toml"):
config.update(load_from_toml(file))
else:
if not no_warning:
logger.warning(f"Unsupported config file format: {file}")
else:
if not no_warning:
logger.warning(f"Config file not found: {file}")
return config
def load_configs_from_dirs(
*directories: str, no_waring: bool = False
) -> dict[str, Any]:
"""
从目录下加载配置文件,不递归
按照读取文件的优先级反向覆盖
默认执行扁平化选项
"""
config = {}
for directory in directories:
if not os.path.exists(directory):
if not no_waring:
logger.warning(f"Directory not found: {directory}")
continue
for file in os.listdir(directory):
if file.endswith(_SUPPORTED_CONFIG_FORMATS):
config.update(
load_from_files(os.path.join(directory, file), no_warning=no_waring)
)
return config
def load_config_in_default(no_waring: bool = False) -> dict[str, Any]:
"""
从一个标准的轻雪项目加载配置文件
项目目录下的config.*和config目录下的所有配置文件
项目目录下的配置文件优先
Args:
no_waring: 是否关闭警告
"""
config = load_configs_from_dirs("config", no_waring=no_waring)
config.update(
load_from_files(
"config.yaml",
"config.toml",
"config.json",
"config.yml",
no_warning=no_waring,
)
)
return config
# new config loader
class Loader:
def __init__(self):
self.config = {}
def load_from_yaml(self, fp: str) -> "Loader":
"""从yaml文件加载配置
Args:
fp
"""
with open(fp, 'r') as file:
self.config.update(yaml.safe_load(file))
return self
def load_from_toml(self, fp: str) -> "Loader":
"""从toml文件加载配置"""
with open(fp, 'r') as file:
self.config.update(toml.load(file))
return self
def load_from_json(self, fp: str) -> "Loader":
"""从json文件加载配置"""
with open(fp, 'r') as file:
self.config.update(json.load(file))
return self
def load_from_env(self, prefix: str = "") -> "Loader":
"""从环境变量加载配置"""
for key, value in os.environ.items():
if key.startswith(prefix):
self.config[key[len(prefix):]] = value
return self
def merge(self, loader: "Loader") -> "Loader":
"""合并两个Loader键值对树"""
self.config.update(loader.config)
return self
def get(self, key: str, default: Any = None) -> Any:
"""获取配置值"""
return self.config.get(key, default)
def __repr__(self) -> str:
return f"Loader(config={self.config})"