chore: tidy codes

Signed-off-by: Jack Cherng <jfcherng@gmail.com>

boot.py

@@ -1,7 +1,7 @@
 def reload_plugin() -> None:
     import sys
 
-    # remove all previously loaded plugin modules.
+    # remove all previously loaded plugin modules
     prefix = f"{__package__}."
     for module_name in tuple(filter(lambda m: m.startswith(prefix) and m != __name__, sys.modules)):
         del sys.modules[module_name]

plugin/constants.py

@@ -1,3 +1,5 @@
 from __future__ import annotations
 
+assert __package__
+
 PLUGIN_NAME = __package__.partition(".")[0]

plugin/helpers.py

@@ -44,7 +44,7 @@ def enabled_app_context_menu_sets() -> Generator[AppContextMenuSet, None, None]:
 
 
 def parse_app_and_target(app_name: str, target_name: str) -> AppContextMenuSet:
-    if not (app_info := APP_INFOS.get(app_name, None)):
+    if not (app_info := APP_INFOS.get(app_name)):
         raise ValueError
 
     if target_name == "_all_":

plugin/types.py

@@ -2,6 +2,7 @@
 
 from dataclasses import dataclass
 from pathlib import Path
+from typing import Literal
 
 import sublime
 
@@ -25,11 +26,10 @@ def app_dir(self) -> Path | None:
             # convention
             if (default := Path(R"C:\Program Files\Sublime Merge")).is_dir():
                 return default
-            return None
         return None
 
 
 @dataclass
 class MenuTarget:
-    type: str
+    type: Literal["file", "directory", "directory_background"]
     reg_key: str