Added existence check to the reload directory(ies)

docs/deployment.md

@@ -35,7 +35,7 @@ Options:
   --uds TEXT                      Bind to a UNIX domain socket.
   --fd INTEGER                    Bind to socket from this file descriptor.
   --reload                        Enable auto-reload.
-  --reload-dir TEXT               Set reload directories explicitly, instead
+  --reload-dir PATH               Set reload directories explicitly, instead
                                   of using the current working directory.
   --reload-delay FLOAT            Delay between previous and next check if
                                   application needs to be. Defaults to 0.25s.

docs/index.md

@@ -108,7 +108,7 @@ Options:
   --uds TEXT                      Bind to a UNIX domain socket.
   --fd INTEGER                    Bind to socket from this file descriptor.
   --reload                        Enable auto-reload.
-  --reload-dir TEXT               Set reload directories explicitly, instead
+  --reload-dir PATH               Set reload directories explicitly, instead
                                   of using the current working directory.
   --reload-delay FLOAT            Delay between previous and next check if
                                   application needs to be. Defaults to 0.25s.

uvicorn/main.py

@@ -77,6 +77,7 @@ def print_version(ctx: click.Context, param: click.Parameter, value: bool) -> No
     multiple=True,
     help="Set reload directories explicitly, instead of using the current working"
     " directory.",
+    type=click.Path(exists=True),
 )
 @click.option(
     "--reload-delay",