moved to internal package and added alias.go

Makefile

@@ -367,7 +367,7 @@ generate-manifests-core: $(CONTROLLER_GEN) $(KUSTOMIZE)
 		paths=./controllers/... \
 		paths=./webhooks/... \
 		paths=./$(EXP_DIR)/api/... \
-		paths=./$(EXP_DIR)/controllers/... \
+		paths=./$(EXP_DIR)/internal/... \
 		paths=./$(EXP_DIR)/addons/api/... \
 		paths=./$(EXP_DIR)/addons/internal/controllers/... \
 		crd:crdVersions=v1 \

docs/book/src/developer/providers/v1.0-to-v1.1.md

@@ -36,6 +36,7 @@ are kept in sync with the versions used by `sigs.k8s.io/controller-runtime`.
     * [exp/addons/controllers](https://github.com/kubernetes-sigs/cluster-api/pull/5639) 
     * [test/infrastructure/docker/controllers](https://github.com/kubernetes-sigs/cluster-api/pull/5595) 
     * [test/infrastructure/docker/exp/controllers](https://github.com/kubernetes-sigs/cluster-api/pull/5690) 
+    * [exp/controllers](https://github.com/kubernetes-sigs/cluster-api/pull/5651)
 
 ### Other
 

exp/controllers/alias.go

@@ -0,0 +1,41 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package controllers
+
+import (
+	"context"
+
+	machinepool "sigs.k8s.io/cluster-api/exp/internal/controllers"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/controller"
+)
+
+// MachinePoolReconciler reconciles a MachinePool object.
+type MachinePoolReconciler struct {
+	Client client.Client
+
+	// WatchFilterValue is the label value used to filter events prior to reconciliation.
+	WatchFilterValue string
+}
+
+func (r *MachinePoolReconciler) SetupWithManager(ctx context.Context, mgr ctrl.Manager, options controller.Options) error {
+	return (&machinepool.MachinePoolReconciler{
+		Client:           r.Client,
+		WatchFilterValue: r.WatchFilterValue,
+	}).SetupWithManager(ctx, mgr, options)
+}

exp/internal/controllers/doc.go

@@ -0,0 +1,18 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package controllers implements experimental controllers.
+package controllers