Fixed two problems when using under windows (#286)

* fix: Fixed an issue where an error would occur when using aerich in windows if the profile contained Chinese characters

* fix: Automatically delete the empty migration directory of the app if the init-db operation fails

* feat: generate migration file in empty directory instead of abort with warning

* tests: fix test fail in ci

---------

Co-authored-by: Waket Zheng <waketzheng@gmail.com>

aerich/__init__.py

@@ -133,7 +133,12 @@ class Command:
         location = self.location
         app = self.app
         dirname = Path(location, app)
-        dirname.mkdir(parents=True)
+        if not dirname.exists():
+            dirname.mkdir(parents=True)
+        else:
+            # If directory is empty, go ahead, otherwise raise FileExistsError
+            for unexpected_file in dirname.glob("*"):
+                raise FileExistsError(str(unexpected_file))
 
         await Tortoise.init(config=self.tortoise_config)
         connection = get_app_connection(self.tortoise_config, app)

aerich/cli.py

@@ -40,7 +40,7 @@ async def cli(ctx: Context, config, app) -> None:
             raise UsageError(
                 "You need to run `aerich init` first to create the config file.", ctx=ctx
             )
-        content = config_path.read_text()
+        content = config_path.read_text("utf-8")
         doc: dict = tomlkit.parse(content)
         try:
             tool = cast(Dict[str, str], doc["tool"]["aerich"])