Fix: error type.

Author: ya7010

cmdcomp/config.py

@@ -6,6 +6,7 @@
 import yaml
 from pydantic import RootModel
 
+from cmdcomp.exception import ConfigFileExtensionError
 from cmdcomp.v1.config import V1Config
 from cmdcomp.v2.config import V2Config
 
@@ -17,8 +18,8 @@ class Config(RootModel):
 
 
 def load(file: BinaryIO) -> Config:
-    _, extention = os.path.splitext(file.name)
-    match extention:
+    _, extension = os.path.splitext(file.name)
+    match extension:
         case ".json":
             data = json.load(file)
 
@@ -29,6 +30,6 @@ def load(file: BinaryIO) -> Config:
             data = tomllib.load(file)
 
         case _:
-            raise Exception(f"Unsupported config file type `{extention}`.")
+            raise ConfigFileExtensionError(extension)
 
     return Config.model_validate(data)

cmdcomp/exception.py

@@ -1,6 +1,14 @@
 from typing import Never
 
 
+class ConfigFileExtensionError(Exception):
+    def __init__(self, extension: str) -> None:
+        self._extension = extension
+
+    def __str__(self) -> str:
+        return f'config file extension "{self._extension}" is not supported.'
+
+
 class NeverReach(Exception):
     def __init__(self, value: Never) -> None:
         self._value = value