chore(client): optimize model build when no model serving api

client/starwhale/api/_impl/service.py

@@ -47,6 +47,9 @@ def add_api_instance(self, api_: Api) -> None:
         self.apis[api_.uri] = api_
 
     def get_spec(self) -> t.Any:
+        # fast path
+        if not self.apis:
+            return {}
         server = self._gen_gradio_server()
         return server.get_config_file()
 

client/tests/data/sdk/service/no_api.py

@@ -0,0 +1,11 @@
+import typing as t
+
+from starwhale import PipelineHandler, PPLResultIterator
+
+
+class NoApi(PipelineHandler):
+    def ppl(self, data: t.Any, **kw: t.Any) -> t.Any:
+        pass
+
+    def cmp(self, ppl_result: PPLResultIterator) -> t.Any:
+        pass

client/tests/sdk/test_service.py

@@ -31,6 +31,10 @@ def test_default_class(self):
         svc = StandaloneModel._get_service("default_class:MyDefaultClass", self.root)
         assert list(svc.apis.keys()) == ["ppl", "handler_foo", "cmp"]
 
+    def test_class_without_api(self):
+        svc = StandaloneModel._get_service("no_api:NoApi", self.root)
+        assert svc.get_spec() == {}
+
     def test_custom_service(self):
         svc = StandaloneModel._get_service("custom_service", self.root)
         assert list(svc.apis.keys()) == ["baz"]