chore: add logging around migration cli (#107046)

pkg/cmd/grafana-cli/commands/datamigrations/to_unified_storage.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/urfave/cli/v2"
 	"k8s.io/apimachinery/pkg/runtime/schema"
 
 	authlib "github.com/grafana/authlib/types"
@@ -16,6 +17,7 @@ import (
 	dashboard "github.com/grafana/grafana/apps/dashboard/pkg/apis/dashboard/v1beta1"
 	folders "github.com/grafana/grafana/apps/folder/pkg/apis/folder/v1beta1"
 	"github.com/grafana/grafana/pkg/apimachinery/identity"
+	"github.com/grafana/grafana/pkg/cmd/grafana-cli/logger"
 	"github.com/grafana/grafana/pkg/cmd/grafana-cli/utils"
 	"github.com/grafana/grafana/pkg/infra/db"
 	"github.com/grafana/grafana/pkg/infra/tracing"
@@ -52,8 +54,10 @@ func ToUnifiedStorage(c utils.CommandLine, cfg *setting.Cfg, sqlStore db.DB) err
 		},
 		LargeObjects: nil, // TODO... from config
 		Progress: func(count int, msg string) {
-			if count < 1 || time.Since(last) > time.Second {
-				fmt.Printf("[%4d] %s\n", count, msg)
+			const minInterval = time.Second
+			shouldPrint := count < 1 || time.Since(last) > minInterval
+			if shouldPrint {
+				logger.Info(fmt.Sprintf("[%4d] %s", count, msg))
 				last = time.Now()
 			}
 		},
@@ -67,7 +71,10 @@ func ToUnifiedStorage(c utils.CommandLine, cfg *setting.Cfg, sqlStore db.DB) err
 	migrator := legacy.NewDashboardAccess(
 		legacysql.NewDatabaseProvider(sqlStore),
 		authlib.OrgNamespaceFormatter,
-		nil, provisioning, nil, sort.ProvideService(),
+		nil, // no dashboards.Store
+		provisioning,
+		nil, // no librarypanels.Service
+		sort.ProvideService(),
 	)
 
 	if c.Bool("non-interactive") {
@@ -80,12 +87,13 @@ func ToUnifiedStorage(c utils.CommandLine, cfg *setting.Cfg, sqlStore db.DB) err
 		opts.BlobStore = client
 		rsp, err := migrator.Migrate(ctx, opts)
 		if err != nil {
-			return err
+			msg := fmt.Sprintf("Failed to migrate legacy resources: %+v", err)
+			return cli.Exit(msg, 1)
 		}
-		fmt.Printf("Unified storage export: %s\n", time.Since(start))
+		logger.Info("Migrated legacy resources successfully in", time.Since(start))
 		if rsp != nil {
 			jj, _ := json.MarshalIndent(rsp, "", "  ")
-			fmt.Printf("%s\n", string(jj))
+			logger.Info("Migration summary:", string(jj))
 		}
 		return nil
 	}