fix: install Python dev deps via requirements-devstack.txt on tilt up

Add a local_resource that pip-installs devtools/requirements-devstack.txt
so tools like localbatch are available without manual setup. The localbatch
serve resource now depends on install-dev-deps so it waits for the install
to complete before starting.

Author: Nissan Pow

devtools/Tiltfile

@@ -181,15 +181,22 @@ local_resource(
     resource_deps=config_resources,
 )
 
+# ---------------------------------------------------------------------------
+# Python dev dependencies
+# ---------------------------------------------------------------------------
+local_resource(
+    name="install-dev-deps",
+    cmd="pip install -r devtools/requirements-devstack.txt",
+    deps=["devtools/requirements-devstack.txt"],
+    labels=["setup"],
+)
+
 # ---------------------------------------------------------------------------
 # Test image
 # ---------------------------------------------------------------------------
 local_resource(
     name="build-test-image",
-    cmd=(
-        "docker build -t metaflow-test:python3.9 docker/metaflow-test/ && " +
-        "minikube image load metaflow-test:python3.9"
-    ),
+    cmd="minikube image build -t metaflow-test:python3.9 docker/metaflow-test/",
     deps=["docker/metaflow-test/Dockerfile"],
     labels=["test"],
 )

devtools/requirements-devstack.txt

@@ -0,0 +1 @@
+localbatch

devtools/tilt/localbatch.tiltfile

@@ -35,7 +35,7 @@ def setup_localbatch(ctx):
             link("http://localhost:8000/docs",   "localbatch API docs"),
         ],
         labels=["localbatch"],
-        resource_deps=ctx.components["localbatch"],
+        resource_deps=ctx.components["localbatch"] + ["install-dev-deps"],
     )
 
     return new_result(