add config parser

config.yaml.exp

@@ -0,0 +1,8 @@
+---
+username: kassandra
+homeserver: https://matrix.org
+password: beware of greeks bearing gifts
+allert_rooms:
+  - "#troy:matrix.org"
+  - "#ithaca:matrix.org"
+...

setup.cfg

@@ -12,6 +12,7 @@ packages = kassandra
 python_requires = >=3.9.2
 package_dir = =src
 install_requires =
+    PyYAML>=5.4.1
 	matrix-bot @ git+https://gitea.auro.re/histausse/matrix-bot.git
 
 [options.package_data]

src/kassandra/__main__.py

@@ -0,0 +1,14 @@
+import argparse
+import asyncio
+
+from .config import load_config
+
+async def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-c", "--config", default="config.yaml")
+    args = parser.parse_args()
+    config = load_config(args.config)
+    print(config)
+
+if __name__ == "__main__":
+    asyncio.run(main())

src/kassandra/config.py

@@ -0,0 +1,22 @@
+"""
+Config related tools.
+"""
+
+import dataclasses
+import yaml
+
+@dataclasses.dataclass
+class Config:
+    username: str
+    homeserver: str
+    password: str
+    allert_rooms: list[str]
+
+def load_config(file:str)->Config:
+    """
+        Load the config from the config file.
+    """
+    with open(file, 'r') as f:
+        data = yaml.load(f, Loader=yaml.loader.SafeLoader)
+    return Config(**data)
+