Fix the way arguments are passed from CLI to UI

Author: vchan

sqlmesh/cli/main.py

@@ -471,8 +471,12 @@ def ui(
 
     os.environ["PROJECT_PATH"] = str(ctx.obj.path)
     if ctx.parent:
-        os.environ["CONFIG"] = ctx.parent.params.get("config") or ""
-        os.environ["GATEWAY"] = ctx.parent.params.get("gateway") or ""
+        config = ctx.parent.params.get("config")
+        gateway = ctx.parent.params.get("gateway")
+        if config:
+            os.environ["CONFIG"] = config
+        if gateway:
+            os.environ["GATEWAY"] = gateway
     uvicorn.run(
         "web.server.main:app",
         host=host,

web/server/settings.py

@@ -2,6 +2,7 @@
 
 import asyncio
 import logging
+import typing as t
 from functools import lru_cache
 from pathlib import Path
 
@@ -26,7 +27,7 @@
 class Settings(BaseSettings):
     project_path: Path = Path("examples/sushi")
     config: str = ""
-    gateway: str = ""
+    gateway: t.Optional[str] = None
 
 
 @lru_cache()