lens: move write-cache get/list into fstree section

CHANGELOG.md

@@ -12,6 +12,7 @@ Changelog for NeoFS Node
 
 ### Changed
 - SN returns unsigned responses to requests with API >= `v2.22` (#3785)
+- Move lens `write-cache` `get`/`list` commands into `fstree` section in CLI (#3838)
 
 ### Removed
 

cmd/neofs-lens/internal/writecache/get.go → cmd/neofs-lens/internal/fstree/get.go

@@ -1,4 +1,4 @@
-package writecache
+package fstree
 
 import (
 	"fmt"
@@ -11,7 +11,7 @@ import (
 var getCMD = &cobra.Command{
 	Use:   "get",
 	Short: "Object inspection",
-	Long:  `Get specific object from a write-cache.`,
+	Long:  `Get specific object from FSTree.`,
 	Args:  cobra.NoArgs,
 	RunE:  getFunc,
 }
@@ -21,21 +21,22 @@ func init() {
 	common.AddComponentPathFlag(getCMD, &vPath)
 	common.AddOutputFileFlag(getCMD, &vOut)
 	common.AddPayloadOnlyFlag(getCMD, &vPayloadOnly)
+	AddDepthFlag(getCMD, &vDepth)
 }
 
 func getFunc(cmd *cobra.Command, _ []string) error {
-	wc, err := openWC()
+	fst, err := openFSTree()
 	if err != nil {
 		return err
 	}
-	defer wc.Close()
+	defer fst.Close()
 
 	addr, err := oid.DecodeAddressString(vAddress)
 	if err != nil {
 		return fmt.Errorf("invalid address: %w", err)
 	}
 
-	obj, err := wc.Get(addr)
+	obj, err := fst.Get(addr)
 	if err != nil {
 		return fmt.Errorf("could not fetch object: %w", err)
 	}

cmd/neofs-lens/internal/writecache/list.go → cmd/neofs-lens/internal/fstree/list.go

@@ -1,4 +1,4 @@
-package writecache
+package fstree
 
 import (
 	"fmt"
@@ -12,33 +12,34 @@ import (
 var listCMD = &cobra.Command{
 	Use:   "list",
 	Short: "Object listing",
-	Long:  `List all objects stored in a write-cache.`,
+	Long:  `List all objects stored in FSTree.`,
 	Args:  cobra.NoArgs,
 	RunE:  listFunc,
 }
 
 func init() {
 	common.AddComponentPathFlag(listCMD, &vPath)
+	AddDepthFlag(listCMD, &vDepth)
 }
 
 func listFunc(cmd *cobra.Command, _ []string) error {
 	// other targets can be supported
 	w := cmd.OutOrStderr()
 
-	wAddr := func(addr oid.Address, _ []byte) error {
-		_, err := io.WriteString(w, fmt.Sprintf("%s\n", addr))
+	wAddr := func(addr oid.Address) error {
+		_, err := io.WriteString(w, addr.EncodeToString()+"\n")
 		return err
 	}
 
-	wc, err := openWC()
+	fst, err := openFSTree()
 	if err != nil {
 		return err
 	}
-	defer wc.Close()
+	defer fst.Close()
 
-	err = wc.Iterate(wAddr, true)
+	err = fst.IterateAddresses(wAddr, true)
 	if err != nil {
-		return fmt.Errorf("write-cache iterator failure: %w", err)
+		return fmt.Errorf("fstree iterator failure: %w", err)
 	}
 	return nil
 }

cmd/neofs-lens/internal/fstree/root.go

@@ -9,7 +9,11 @@ import (
 )
 
 var (
-	vPath string
+	vAddress     string
+	vPath        string
+	vOut         string
+	vPayloadOnly bool
+	vDepth       uint64
 )
 
 // Root defines root command for operations with FSTree.
@@ -20,13 +24,20 @@ var Root = &cobra.Command{
 
 func init() {
 	Root.AddCommand(cleanupCMD)
+	Root.AddCommand(getCMD)
+	Root.AddCommand(listCMD)
+}
+
+func AddDepthFlag(cmd *cobra.Command, depth *uint64) {
+	cmd.Flags().Uint64VarP(depth, "depth", "d", 4, "FSTree depth, for write-cache 1 must be used")
 }
 
 // openFSTree opens and returns fstree.FSTree located in vPath.
 func openFSTree() (*fstree.FSTree, error) {
 	fst := fstree.New(
 		fstree.WithPath(vPath),
 		fstree.WithPerm(0600),
+		fstree.WithDepth(vDepth),
 	)
 
 	var compressCfg compression.Config

cmd/neofs-lens/root.go

@@ -8,7 +8,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-lens/internal/meta"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-lens/internal/object"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-lens/internal/storage"
-	"github.com/nspcc-dev/neofs-node/cmd/neofs-lens/internal/writecache"
 	"github.com/nspcc-dev/neofs-node/misc"
 	"github.com/nspcc-dev/neofs-node/pkg/util/gendoc"
 	"github.com/spf13/cobra"
@@ -40,7 +39,6 @@ func init() {
 	command.Flags().Bool("version", false, "Application version")
 	command.AddCommand(
 		meta.Root,
-		writecache.Root,
 		storage.Root,
 		object.Root,
 		fstree.Root,