Implement a basic operator to reconcile the folder hierarchy from Unistore to Zanzana (#109705)

apps/iam/pkg/app/app.go

@@ -0,0 +1,63 @@
+package app
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/grafana/grafana-app-sdk/app"
+	"github.com/grafana/grafana-app-sdk/logging"
+	"github.com/grafana/grafana-app-sdk/simple"
+	foldersKind "github.com/grafana/grafana/apps/folder/pkg/apis/folder/v1beta1"
+	"github.com/grafana/grafana/apps/iam/pkg/reconcilers"
+)
+
+type AppConfig = reconcilers.AppConfig
+
+var appManifestData = app.ManifestData{
+	AppName: "iam-folder-reconciler",
+	Group:   "iam.grafana.app",
+}
+
+func Provider(appCfg AppConfig) app.Provider {
+	return simple.NewAppProvider(app.NewEmbeddedManifest(appManifestData), appCfg, New)
+}
+
+func New(cfg app.Config) (app.App, error) {
+	folderReconciler, err := reconcilers.NewFolderReconciler(cfg)
+	if err != nil {
+		return nil, fmt.Errorf("unable to create FolderReconciler: %w", err)
+	}
+
+	logging.DefaultLogger.Info("FolderReconciler created")
+
+	config := simple.AppConfig{
+		Name:       cfg.ManifestData.AppName,
+		KubeConfig: cfg.KubeConfig,
+		InformerConfig: simple.AppInformerConfig{
+			ErrorHandler: func(ctx context.Context, err error) {
+				// FIXME: add your own error handling here
+				logging.FromContext(ctx).With("error", err).Error("Informer processing error")
+			},
+		},
+		UnmanagedKinds: []simple.AppUnmanagedKind{
+			{
+				Kind:       foldersKind.FolderKind(),
+				Reconciler: folderReconciler,
+				ReconcileOptions: simple.BasicReconcileOptions{
+					Namespace: cfg.SpecificConfig.(AppConfig).FolderReconcilerNamespace,
+				},
+			},
+		},
+	}
+
+	// Create the App
+	a, err := simple.NewApp(config)
+	if err != nil {
+		return nil, err
+	}
+
+	// Validate the capabilities against the provided manifest to make sure there isn't a mismatch
+	err = a.ValidateManifest(cfg.ManifestData)
+
+	return a, err
+}