[#1223] lens/tui: Add TUI app to explore metabase

Signed-off-by: Aleksey Savchuk <a.savchuk@yadro.com>

cmd/frostfs-lens/internal/meta/root.go

@@ -32,6 +32,7 @@ func init() {
 		inspectCMD,
 		listGraveyardCMD,
 		listGarbageCMD,
+		tuiCMD,
 	)
 }
 

cmd/frostfs-lens/internal/meta/tui.go

@@ -0,0 +1,82 @@
+package meta
+
+import (
+	"context"
+	"fmt"
+
+	common "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal"
+	schema "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal/schema/metabase"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal/tui"
+	"github.com/rivo/tview"
+	"github.com/spf13/cobra"
+	"go.etcd.io/bbolt"
+)
+
+var tuiCMD = &cobra.Command{
+	Use:   "explore",
+	Short: "Metabase exploration with a terminal UI",
+	Long: `Launch a terminal UI to explore metabase and search for data.
+
+Available search filters:
+- cid  CID
+- oid  OID
+- addr CID/OID
+- attr key[/value]
+`,
+	Run: tuiFunc,
+}
+
+var initialPrompt string
+
+func init() {
+	common.AddComponentPathFlag(tuiCMD, &vPath)
+
+	tuiCMD.Flags().StringVar(
+		&initialPrompt,
+		"filter",
+		"",
+		"Filter prompt to start with, format 'tag:value [+ tag:value]...'",
+	)
+}
+
+func tuiFunc(cmd *cobra.Command, _ []string) {
+	common.ExitOnErr(cmd, runTUI(cmd))
+}
+
+func runTUI(cmd *cobra.Command) error {
+	db, err := openDB(false)
+	if err != nil {
+		return fmt.Errorf("couldn't open database: %w", err)
+	}
+	defer db.Close()
+
+	// Need if app was stopped with Ctrl-C.
+	ctx, cancel := context.WithCancel(cmd.Context())
+	defer cancel()
+
+	app := tview.NewApplication()
+	ui := tui.NewUI(ctx, app, db, schema.MetabaseParser, nil)
+
+	_ = ui.AddFilter("cid", tui.CIDParser, "CID")
+	_ = ui.AddFilter("oid", tui.OIDParser, "OID")
+	_ = ui.AddCompositeFilter("addr", tui.AddressParser, "CID/OID")
+	_ = ui.AddCompositeFilter("attr", tui.AttributeParser, "key[/value]")
+
+	err = ui.WithPrompt(initialPrompt)
+	if err != nil {
+		return fmt.Errorf("invalid filter prompt: %w", err)
+	}
+
+	app.SetRoot(ui, true).SetFocus(ui)
+	return app.Run()
+}
+
+func openDB(writable bool) (*bbolt.DB, error) {
+	db, err := bbolt.Open(vPath, 0o600, &bbolt.Options{
+		ReadOnly: !writable,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return db, nil
+}

cmd/frostfs-lens/internal/tui/buckets.go

@@ -0,0 +1,257 @@
+package tui
+
+import (
+	"context"
+	"sync"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal/schema/common"
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+type BucketsView struct {
+	*tview.Box
+
+	mu sync.Mutex
+
+	view         *tview.TreeView
+	nodeToUpdate *tview.TreeNode
+
+	ui     *UI
+	filter *Filter
+}
+
+type bucketNode struct {
+	bucket *Bucket
+	filter *Filter
+}
+
+func NewBucketsView(ui *UI, filter *Filter) *BucketsView {
+	return &BucketsView{
+		Box:    tview.NewBox(),
+		view:   tview.NewTreeView(),
+		ui:     ui,
+		filter: filter,
+	}
+}
+
+func (v *BucketsView) Mount(_ context.Context) error {
+	root := tview.NewTreeNode(".")
+	root.SetExpanded(false)
+	root.SetSelectable(false)
+	root.SetReference(&bucketNode{
+		bucket: &Bucket{NextParser: v.ui.rootParser},
+		filter: v.filter,
+	})
+
+	v.nodeToUpdate = root
+
+	v.view.SetRoot(root)
+	v.view.SetCurrentNode(root)
+
+	return nil
+}
+
+func (v *BucketsView) Update(ctx context.Context) error {
+	if v.nodeToUpdate == nil {
+		return nil
+	}
+	defer func() { v.nodeToUpdate = nil }()
+
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	ready := make(chan struct{})
+	errCh := make(chan error)
+
+	tmp := tview.NewTreeNode(v.nodeToUpdate.GetText())
+	tmp.SetReference(v.nodeToUpdate.GetReference())
+
+	node := v.nodeToUpdate.GetReference().(*bucketNode)
+
+	go func() {
+		defer close(ready)
+
+		hasBuckets, err := HasBuckets(ctx, v.ui.db, node.bucket.Path)
+		if err != nil {
+			errCh <- err
+		}
+
+		// Show the selected bucket's records instead.
+		if !hasBuckets && node.bucket.NextParser != nil {
+			v.ui.moveNextPage(NewRecordsView(v.ui, node.bucket, node.filter))
+		}
+
+		if v.nodeToUpdate.IsExpanded() {
+			return
+		}
+
+		err = v.loadNodeChildren(ctx, tmp, node.filter)
+		if err != nil {
+			errCh <- err
+		}
+	}()
+
+	select {
+	case <-ctx.Done():
+	case <-ready:
+		v.mu.Lock()
+		v.nodeToUpdate.SetChildren(tmp.GetChildren())
+		v.nodeToUpdate.SetExpanded(!v.nodeToUpdate.IsExpanded())
+		v.mu.Unlock()
+	case err := <-errCh:
+		return err
+	}
+
+	return nil
+}
+
+func (v *BucketsView) Unmount() {
+}
+
+func (v *BucketsView) Draw(screen tcell.Screen) {
+	x, y, width, height := v.GetInnerRect()
+	v.view.SetRect(x, y, width, height)
+
+	v.view.Draw(screen)
+}
+
+func (v *BucketsView) loadNodeChildren(
+	ctx context.Context, node *tview.TreeNode, filter *Filter,
+) error {
+	parentBucket := node.GetReference().(*bucketNode).bucket
+
+	path := parentBucket.Path
+	parser := parentBucket.NextParser
+
+	buffer, err := LoadBuckets(ctx, v.ui.db, path, v.ui.loadBufferSize)
+	if err != nil {
+		return err
+	}
+
+	for item := range buffer {
+		if item.err != nil {
+			return item.err
+		}
+		bucket := item.val
+
+		bucket.Entry, bucket.NextParser, err = parser(bucket.Name, nil)
+		if err != nil {
+			return err
+		}
+
+		satisfies, err := v.bucketSatisfiesFilter(ctx, bucket, filter)
+		if err != nil {
+			return err
+		}
+		if !satisfies {
+			continue
+		}
+
+		child := tview.NewTreeNode(bucket.Entry.String()).
+			SetSelectable(true).
+			SetExpanded(false).
+			SetReference(&bucketNode{
+				bucket: bucket,
+				filter: filter.Apply(bucket.Entry),
+			})
+
+		node.AddChild(child)
+	}
+
+	return nil
+}
+
+func (v *BucketsView) bucketSatisfiesFilter(
+	ctx context.Context, bucket *Bucket, filter *Filter,
+) (bool, error) {
+	// Does the current bucket satisfies the filter?
+	filter = filter.Apply(bucket.Entry)
+
+	if filter.Result() == common.Yes {
+		return true, nil
+	}
+
+	if filter.Result() == common.No {
+		return false, nil
+	}
+
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	// Check the current bucket's nested buckets if exist
+	bucketsBuffer, err := LoadBuckets(ctx, v.ui.db, bucket.Path, v.ui.loadBufferSize)
+	if err != nil {
+		return false, err
+	}
+
+	for item := range bucketsBuffer {
+		if item.err != nil {
+			return false, item.err
+		}
+		b := item.val
+
+		b.Entry, b.NextParser, err = bucket.NextParser(b.Name, nil)
+		if err != nil {
+			return false, err
+		}
+
+		satisfies, err := v.bucketSatisfiesFilter(ctx, b, filter)
+		if err != nil {
+			return false, err
+		}
+		if satisfies {
+			return true, nil
+		}
+	}
+
+	// Check the current bucket's nested records if exist
+	recordsBuffer, err := LoadRecords(ctx, v.ui.db, bucket.Path, v.ui.loadBufferSize)
+	if err != nil {
+		return false, err
+	}
+
+	for item := range recordsBuffer {
+		if item.err != nil {
+			return false, item.err
+		}
+		r := item.val
+
+		r.Entry, _, err = bucket.NextParser(r.Key, r.Value)
+		if err != nil {
+			return false, err
+		}
+
+		if filter.Apply(r.Entry).Result() == common.Yes {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}
+
+func (v *BucketsView) InputHandler() func(event *tcell.EventKey, setFocus func(p tview.Primitive)) {
+	return v.WrapInputHandler(func(event *tcell.EventKey, _ func(tview.Primitive)) {
+		currentNode := v.view.GetCurrentNode()
+		if currentNode == nil {
+			return
+		}
+
+		switch event.Key() {
+		case tcell.KeyEnter:
+			// Expand or collapse the selected bucket's nested buckets,
+			// otherwise, navigate to that bucket's records.
+			v.nodeToUpdate = currentNode
+		case tcell.KeyCtrlR:
+			// Navigate to the selected bucket's records.
+			bucketNode := currentNode.GetReference().(*bucketNode)
+			v.ui.moveNextPage(NewRecordsView(v.ui, bucketNode.bucket, bucketNode.filter))
+		case tcell.KeyCtrlD:
+			// Navigate to the selected bucket's detailed view.
+			bucketNode := currentNode.GetReference().(*bucketNode)
+			v.ui.moveNextPage(NewDetailedView(bucketNode.bucket.Entry.DetailedString()))
+		default:
+			v.view.InputHandler()(event, func(tview.Primitive) {})
+		}
+	})
+}

cmd/frostfs-lens/internal/tui/db.go

@@ -0,0 +1,160 @@
+package tui
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"go.etcd.io/bbolt"
+)
+
+type Item[T any] struct {
+	val T
+	err error
+}
+
+func resolvePath(tx *bbolt.Tx, path [][]byte) (*bbolt.Bucket, error) {
+	if len(path) == 0 {
+		return nil, errors.New("can't find bucket without path")
+	}
+
+	name := path[0]
+	bucket := tx.Bucket(name)
+	if bucket == nil {
+		return nil, fmt.Errorf("no bucket with name %s", name)
+	}
+	for _, name := range path[1:] {
+		bucket = bucket.Bucket(name)
+		if bucket == nil {
+			return nil, fmt.Errorf("no bucket with name %s", name)
+		}
+	}
+	return bucket, nil
+}
+
+func load[T any](
+	ctx context.Context, db *bbolt.DB, path [][]byte, bufferSize int,
+	filter func(key, value []byte) bool, transform func(key, value []byte) T,
+) (<-chan Item[T], error) {
+	buffer := make(chan Item[T], bufferSize)
+
+	go func() {
+		defer close(buffer)
+
+		err := db.View(func(tx *bbolt.Tx) error {
+			var cursor *bbolt.Cursor
+			if len(path) == 0 {
+				cursor = tx.Cursor()
+			} else {
+				bucket, err := resolvePath(tx, path)
+				if err != nil {
+					buffer <- Item[T]{err: fmt.Errorf("can't find bucket: %w", err)}
+					return nil
+				}
+				cursor = bucket.Cursor()
+			}
+
+			key, value := cursor.First()
+			for {
+				if key == nil {
+					return nil
+				}
+				if filter != nil && !filter(key, value) {
+					key, value = cursor.Next()
+					continue
+				}
+
+				select {
+				case <-ctx.Done():
+					return nil
+				case buffer <- Item[T]{val: transform(key, value)}:
+					key, value = cursor.Next()
+				}
+			}
+		})
+		if err != nil {
+			buffer <- Item[T]{err: err}
+		}
+	}()
+
+	return buffer, nil
+}
+
+func LoadBuckets(
+	ctx context.Context, db *bbolt.DB, path [][]byte, bufferSize int,
+) (<-chan Item[*Bucket], error) {
+	buffer, err := load(
+		ctx, db, path, bufferSize,
+		func(_, value []byte) bool {
+			return value == nil
+		},
+		func(key, _ []byte) *Bucket {
+			base := make([][]byte, 0, len(path))
+			base = append(base, path...)
+
+			return &Bucket{
+				Name: key,
+				Path: append(base, key),
+			}
+		},
+	)
+	if err != nil {
+		return nil, fmt.Errorf("can't start iterating bucket: %w", err)
+	}
+
+	return buffer, nil
+}
+
+func LoadRecords(
+	ctx context.Context, db *bbolt.DB, path [][]byte, bufferSize int,
+) (<-chan Item[*Record], error) {
+	buffer, err := load(
+		ctx, db, path, bufferSize,
+		func(_, value []byte) bool {
+			return value != nil
+		},
+		func(key, value []byte) *Record {
+			base := make([][]byte, 0, len(path))
+			base = append(base, path...)
+
+			return &Record{
+				Key:   key,
+				Value: value,
+				Path:  append(base, key),
+			}
+		},
+	)
+	if err != nil {
+		return nil, fmt.Errorf("can't start iterating bucket: %w", err)
+	}
+
+	return buffer, nil
+}
+
+// HasBuckets checks if a bucket has nested buckets. It relies on assumption
+// that a bucket can have either nested buckets or records but not both.
+func HasBuckets(ctx context.Context, db *bbolt.DB, path [][]byte) (bool, error) {
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	buffer, err := load(
+		ctx, db, path, 1,
+		nil,
+		func(_, value []byte) []byte { return value },
+	)
+	if err != nil {
+		return false, err
+	}
+
+	x, ok := <-buffer
+	if !ok {
+		return false, nil
+	}
+	if x.err != nil {
+		return false, err
+	}
+	if x.val != nil {
+		return false, err
+	}
+	return true, nil
+}

cmd/frostfs-lens/internal/tui/detailed.go

@@ -0,0 +1,24 @@
+package tui
+
+import (
+	"context"
+
+	"github.com/rivo/tview"
+)
+
+type DetailedView struct {
+	*tview.TextView
+}
+
+func NewDetailedView(detailed string) *DetailedView {
+	v := &DetailedView{
+		TextView: tview.NewTextView(),
+	}
+	v.SetDynamicColors(true)
+	v.SetText(detailed)
+	return v
+}
+
+func (v *DetailedView) Mount(_ context.Context) error  { return nil }
+func (v *DetailedView) Update(_ context.Context) error { return nil }
+func (v *DetailedView) Unmount()                       {}

cmd/frostfs-lens/internal/tui/filter.go

@@ -0,0 +1,44 @@
+package tui
+
+import (
+	"maps"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal/schema/common"
+)
+
+type Filter struct {
+	values  map[string]any
+	results map[string]common.FilterResult
+}
+
+func NewFilter(values map[string]any) *Filter {
+	f := &Filter{
+		values:  maps.Clone(values),
+		results: make(map[string]common.FilterResult),
+	}
+	for tag := range values {
+		f.results[tag] = common.No
+	}
+	return f
+}
+
+func (f *Filter) Apply(e common.SchemaEntry) *Filter {
+	filter := &Filter{
+		values:  f.values,
+		results: maps.Clone(f.results),
+	}
+
+	for tag, value := range filter.values {
+		filter.results[tag] = max(filter.results[tag], e.Filter(tag, value))
+	}
+
+	return filter
+}
+
+func (f *Filter) Result() common.FilterResult {
+	current := common.Yes
+	for _, r := range f.results {
+		current = min(r, current)
+	}
+	return current
+}

cmd/frostfs-lens/internal/tui/input.go

@@ -0,0 +1,77 @@
+package tui
+
+import (
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+type InputFieldWithHistory struct {
+	*tview.InputField
+	history        []string
+	historyLimit   int
+	historyPointer int
+	currentContent string
+}
+
+func NewInputFieldWithHistory(historyLimit int) *InputFieldWithHistory {
+	return &InputFieldWithHistory{
+		InputField:   tview.NewInputField(),
+		historyLimit: historyLimit,
+	}
+}
+
+func (f *InputFieldWithHistory) AddToHistory(s string) {
+	// Stop scrolling history on history change, need to start scrolling again.
+	defer func() { f.historyPointer = len(f.history) }()
+
+	// Used history data for search prompt, so just make that data recent.
+	if f.historyPointer != len(f.history) && s == f.history[f.historyPointer] {
+		f.history = append(f.history[:f.historyPointer], f.history[f.historyPointer+1:]...)
+		f.history = append(f.history, s)
+	}
+
+	if len(f.history) == f.historyLimit {
+		f.history = f.history[1:]
+	}
+	f.history = append(f.history, s)
+}
+
+func (f *InputFieldWithHistory) InputHandler() func(event *tcell.EventKey, setFocus func(p tview.Primitive)) {
+	return f.WrapInputHandler(func(event *tcell.EventKey, _ func(tview.Primitive)) {
+		switch event.Key() {
+		case tcell.KeyDown:
+			if len(f.history) == 0 {
+				return
+			}
+			// Need to start iterating before.
+			if f.historyPointer == len(f.history) {
+				return
+			}
+			// Iterate to most recent prompts.
+			f.historyPointer++
+			// Stop iterating over history.
+			if f.historyPointer == len(f.history) {
+				f.InputField.SetText(f.currentContent)
+				return
+			}
+			f.InputField.SetText(f.history[f.historyPointer])
+		case tcell.KeyUp:
+			if len(f.history) == 0 {
+				return
+			}
+			// Start iterating over history.
+			if f.historyPointer == len(f.history) {
+				f.currentContent = f.InputField.GetText()
+			}
+			// End of history.
+			if f.historyPointer == 0 {
+				return
+			}
+			// Iterate to least recent prompts.
+			f.historyPointer--
+			f.InputField.SetText(f.history[f.historyPointer])
+		default:
+			f.InputField.InputHandler()(event, func(tview.Primitive) {})
+		}
+	})
+}

cmd/frostfs-lens/internal/tui/loading.go

@@ -0,0 +1,72 @@
+package tui
+
+import (
+	"context"
+	"fmt"
+	"sync/atomic"
+	"time"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+type LoadingBar struct {
+	*tview.Box
+	view           *tview.TextView
+	secondsElapsed atomic.Int64
+	needDrawFunc   func()
+	reset          func()
+}
+
+func NewLoadingBar(needDrawFunc func()) *LoadingBar {
+	b := &LoadingBar{
+		Box:          tview.NewBox(),
+		view:         tview.NewTextView(),
+		needDrawFunc: needDrawFunc,
+	}
+	b.view.SetBackgroundColor(tview.Styles.PrimaryTextColor)
+	b.view.SetTextColor(b.GetBackgroundColor())
+
+	return b
+}
+
+func (b *LoadingBar) Start(ctx context.Context) {
+	ctx, b.reset = context.WithCancel(ctx)
+
+	go func() {
+		ticker := time.NewTicker(1 * time.Second)
+		defer ticker.Stop()
+
+		b.secondsElapsed.Store(0)
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-ticker.C:
+				b.secondsElapsed.Add(1)
+				b.needDrawFunc()
+			}
+		}
+	}()
+}
+
+func (b *LoadingBar) Stop() {
+	b.reset()
+}
+
+func (b *LoadingBar) Draw(screen tcell.Screen) {
+	seconds := b.secondsElapsed.Load()
+
+	var time string
+	switch {
+	case seconds < 60:
+		time = fmt.Sprintf("%ds", seconds)
+	default:
+		time = fmt.Sprintf("%dm%ds", seconds/60, seconds%60)
+	}
+	b.view.SetText(fmt.Sprintf(" Loading... %s (press Escape to cancel) ", time))
+
+	x, y, width, _ := b.GetInnerRect()
+	b.view.SetRect(x, y, width, 1)
+	b.view.Draw(screen)
+}

cmd/frostfs-lens/internal/tui/records.go

@@ -0,0 +1,271 @@
+package tui
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"math"
+	"sync"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal/schema/common"
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+type updateType int
+
+const (
+	other updateType = iota
+	moveToPrevPage
+	moveToNextPage
+	moveUp
+	moveDown
+	moveHome
+	moveEnd
+)
+
+type RecordsView struct {
+	*tview.Box
+
+	mu sync.RWMutex
+
+	onUnmount func()
+
+	bucket  *Bucket
+	records []*Record
+
+	buffer chan *Record
+
+	firstRecordIndex    int
+	lastRecordIndex     int
+	selectedRecordIndex int
+
+	updateType updateType
+
+	ui     *UI
+	filter *Filter
+}
+
+func NewRecordsView(ui *UI, bucket *Bucket, filter *Filter) *RecordsView {
+	return &RecordsView{
+		Box:    tview.NewBox(),
+		bucket: bucket,
+		ui:     ui,
+		filter: filter,
+	}
+}
+
+func (v *RecordsView) Mount(ctx context.Context) error {
+	if v.onUnmount != nil {
+		return errors.New("try to mount already mounted component")
+	}
+
+	ctx, v.onUnmount = context.WithCancel(ctx)
+
+	tempBuffer, err := LoadRecords(ctx, v.ui.db, v.bucket.Path, v.ui.loadBufferSize)
+	if err != nil {
+		return err
+	}
+
+	v.buffer = make(chan *Record, v.ui.loadBufferSize)
+	go func() {
+		defer close(v.buffer)
+
+		for item := range tempBuffer {
+			if item.err != nil {
+				v.ui.stopOnError(err)
+				break
+			}
+			record := item.val
+
+			record.Entry, _, err = v.bucket.NextParser(record.Key, record.Value)
+			if err != nil {
+				v.ui.stopOnError(err)
+				break
+			}
+
+			if v.filter.Apply(record.Entry).Result() != common.Yes {
+				continue
+			}
+
+			v.buffer <- record
+		}
+	}()
+
+	return nil
+}
+
+func (v *RecordsView) Unmount() {
+	if v.onUnmount == nil {
+		panic("try to unmount not mounted component")
+	}
+	v.onUnmount()
+	v.onUnmount = nil
+}
+
+func (v *RecordsView) Update(ctx context.Context) error {
+	_, _, _, recordsPerPage := v.GetInnerRect()
+	firstRecordIndex, lastRecordIndex, selectedRecordIndex := v.getNewIndexes()
+
+loop:
+	for len(v.records) < lastRecordIndex {
+		select {
+		case <-ctx.Done():
+			return nil
+		case record, ok := <-v.buffer:
+			if !ok {
+				break loop
+			}
+			v.records = append(v.records, record)
+		}
+	}
+
+	// Set the update type to its default value after some specific key event
+	// has been handled.
+	v.updateType = other
+
+	firstRecordIndex = max(0, min(firstRecordIndex, len(v.records)-recordsPerPage))
+	lastRecordIndex = min(firstRecordIndex+recordsPerPage, len(v.records))
+	selectedRecordIndex = min(selectedRecordIndex, lastRecordIndex-1)
+
+	v.mu.Lock()
+	v.firstRecordIndex = firstRecordIndex
+	v.lastRecordIndex = lastRecordIndex
+	v.selectedRecordIndex = selectedRecordIndex
+	v.mu.Unlock()
+
+	return nil
+}
+
+func (v *RecordsView) getNewIndexes() (int, int, int) {
+	v.mu.RLock()
+	firstRecordIndex := v.firstRecordIndex
+	lastRecordIndex := v.lastRecordIndex
+	selectedRecordIndex := v.selectedRecordIndex
+	v.mu.RUnlock()
+
+	_, _, _, recordsPerPage := v.GetInnerRect()
+
+	switch v.updateType {
+	case moveUp:
+		if selectedRecordIndex != firstRecordIndex {
+			selectedRecordIndex--
+			break
+		}
+		firstRecordIndex = max(0, firstRecordIndex-1)
+		lastRecordIndex = min(firstRecordIndex+recordsPerPage, len(v.records))
+		selectedRecordIndex = firstRecordIndex
+	case moveToPrevPage:
+		if selectedRecordIndex != firstRecordIndex {
+			selectedRecordIndex = firstRecordIndex
+			break
+		}
+		firstRecordIndex = max(0, firstRecordIndex-recordsPerPage)
+		lastRecordIndex = firstRecordIndex + recordsPerPage
+		selectedRecordIndex = firstRecordIndex
+	case moveDown:
+		if selectedRecordIndex != lastRecordIndex-1 {
+			selectedRecordIndex++
+			break
+		}
+		firstRecordIndex++
+		lastRecordIndex++
+		selectedRecordIndex++
+	case moveToNextPage:
+		if selectedRecordIndex != lastRecordIndex-1 {
+			selectedRecordIndex = lastRecordIndex - 1
+			break
+		}
+		firstRecordIndex += recordsPerPage
+		lastRecordIndex = firstRecordIndex + recordsPerPage
+		selectedRecordIndex = lastRecordIndex - 1
+	case moveHome:
+		firstRecordIndex = 0
+		lastRecordIndex = firstRecordIndex + recordsPerPage
+		selectedRecordIndex = 0
+	case moveEnd:
+		lastRecordIndex = math.MaxInt32
+		firstRecordIndex = lastRecordIndex - recordsPerPage
+		selectedRecordIndex = lastRecordIndex - 1
+	default:
+		lastRecordIndex = firstRecordIndex + recordsPerPage
+	}
+
+	return firstRecordIndex, lastRecordIndex, selectedRecordIndex
+}
+
+func (v *RecordsView) GetInnerRect() (int, int, int, int) {
+	x, y, width, height := v.Box.GetInnerRect()
+
+	// Left padding.
+	x = min(x+3, x+width-1)
+	width = max(width-3, 0)
+
+	return x, y, width, height
+}
+
+func (v *RecordsView) Draw(screen tcell.Screen) {
+	v.mu.RLock()
+	firstRecordIndex := v.firstRecordIndex
+	lastRecordIndex := v.lastRecordIndex
+	selectedRecordIndex := v.selectedRecordIndex
+	records := v.records
+	v.mu.RUnlock()
+
+	v.DrawForSubclass(screen, v)
+
+	x, y, width, height := v.GetInnerRect()
+	if height == 0 {
+		return
+	}
+
+	// No records in that bucket.
+	if firstRecordIndex == lastRecordIndex {
+		tview.Print(
+			screen, "Empty Bucket", x, y, width, tview.AlignCenter, tview.Styles.PrimaryTextColor,
+		)
+		return
+	}
+
+	for index := firstRecordIndex; index < lastRecordIndex; index++ {
+		result := records[index].Entry
+		text := result.String()
+
+		if index == selectedRecordIndex {
+			text = fmt.Sprintf("[:white]%s[:-]", text)
+			tview.Print(screen, text, x, y, width, tview.AlignLeft, tview.Styles.PrimitiveBackgroundColor)
+		} else {
+			tview.Print(screen, text, x, y, width, tview.AlignLeft, tview.Styles.PrimaryTextColor)
+		}
+
+		y++
+	}
+}
+
+func (v *RecordsView) InputHandler() func(event *tcell.EventKey, _ func(p tview.Primitive)) {
+	return v.WrapInputHandler(func(event *tcell.EventKey, _ func(p tview.Primitive)) {
+		switch m, k := event.Modifiers(), event.Key(); {
+		case m == 0 && k == tcell.KeyPgUp:
+			v.updateType = moveToPrevPage
+		case m == 0 && k == tcell.KeyPgDn:
+			v.updateType = moveToNextPage
+		case m == 0 && k == tcell.KeyUp:
+			v.updateType = moveUp
+		case m == 0 && k == tcell.KeyDown:
+			v.updateType = moveDown
+		case m == 0 && k == tcell.KeyHome:
+			v.updateType = moveHome
+		case m == 0 && k == tcell.KeyEnd:
+			v.updateType = moveEnd
+		case k == tcell.KeyEnter:
+			v.mu.RLock()
+			selectedRecordIndex := v.selectedRecordIndex
+			records := v.records
+			v.mu.RUnlock()
+			if len(records) != 0 {
+				current := records[selectedRecordIndex]
+				v.ui.moveNextPage(NewDetailedView(current.Entry.DetailedString()))
+			}
+		}
+	})
+}

cmd/frostfs-lens/internal/tui/types.go

@@ -0,0 +1,18 @@
+package tui
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal/schema/common"
+)
+
+type Bucket struct {
+	Name       []byte
+	Path       [][]byte
+	Entry      common.SchemaEntry
+	NextParser common.Parser
+}
+
+type Record struct {
+	Key, Value []byte
+	Path       [][]byte
+	Entry      common.SchemaEntry
+}

cmd/frostfs-lens/internal/tui/ui.go

@@ -0,0 +1,548 @@
+package tui
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+	"sync/atomic"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal/schema/common"
+	"github.com/davecgh/go-spew/spew"
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+	"go.etcd.io/bbolt"
+)
+
+type Config struct {
+	LoadBufferSize      int
+	SearchHistorySize   int
+	LoadingIndicatorLag time.Duration
+}
+
+var DefaultConfig = Config{
+	LoadBufferSize:      100,
+	SearchHistorySize:   100,
+	LoadingIndicatorLag: 500 * time.Millisecond,
+}
+
+type Primitive interface {
+	tview.Primitive
+
+	Mount(ctx context.Context) error
+	Update(ctx context.Context) error
+	Unmount()
+}
+
+type UI struct {
+	*tview.Box
+
+	// Need to use context while updating pages those read data from a database.
+	// Context should be shared among all mount and updates. Current TUI library
+	// doesn't use contexts at all, so I do that feature by myself.
+	//nolint:containedctx
+	ctx    context.Context
+	onStop func()
+
+	app *tview.Application
+	db  *bbolt.DB
+
+	pageHistory []Primitive
+	mountedPage Primitive
+
+	pageToMount Primitive
+
+	pageStub tview.Primitive
+
+	infoBar    *tview.TextView
+	searchBar  *InputFieldWithHistory
+	loadingBar *LoadingBar
+	helpBar    *tview.TextView
+
+	searchErrorBar *tview.TextView
+
+	isSearching    bool
+	isLoading      atomic.Bool
+	isShowingError bool
+	isShowingHelp  bool
+
+	loadBufferSize int
+
+	rootParser common.Parser
+
+	loadingIndicatorLag time.Duration
+
+	cancelLoading func()
+
+	filters          map[string]func(string) (any, error)
+	compositeFilters map[string]func(string) (map[string]any, error)
+	filterHints      map[string]string
+}
+
+func NewUI(
+	ctx context.Context,
+	app *tview.Application,
+	db *bbolt.DB,
+	rootParser common.Parser,
+	cfg *Config,
+) *UI {
+	spew.Config.DisableMethods = true
+
+	if cfg == nil {
+		cfg = &DefaultConfig
+	}
+
+	ui := &UI{
+		Box: tview.NewBox(),
+
+		app:        app,
+		db:         db,
+		rootParser: rootParser,
+
+		filters:          make(map[string]func(string) (any, error)),
+		compositeFilters: make(map[string]func(string) (map[string]any, error)),
+		filterHints:      make(map[string]string),
+
+		loadBufferSize:      cfg.LoadBufferSize,
+		loadingIndicatorLag: cfg.LoadingIndicatorLag,
+	}
+
+	ui.ctx, ui.onStop = context.WithCancel(ctx)
+
+	backgroundColor := ui.GetBackgroundColor()
+	textColor := tview.Styles.PrimaryTextColor
+
+	inverseBackgroundColor := textColor
+	inverseTextColor := backgroundColor
+
+	alertTextColor := tcell.ColorRed
+
+	ui.pageStub = tview.NewBox()
+
+	ui.infoBar = tview.NewTextView()
+	ui.infoBar.SetBackgroundColor(inverseBackgroundColor)
+	ui.infoBar.SetTextColor(inverseTextColor)
+	ui.infoBar.SetText(
+		fmt.Sprintf(" %s (press h for help, q to quit) ", db.Path()),
+	)
+
+	ui.searchBar = NewInputFieldWithHistory(cfg.SearchHistorySize)
+	ui.searchBar.SetFieldBackgroundColor(backgroundColor)
+	ui.searchBar.SetFieldTextColor(textColor)
+	ui.searchBar.SetLabelColor(textColor)
+	ui.searchBar.Focus(nil)
+	ui.searchBar.SetLabel("/")
+
+	ui.searchErrorBar = tview.NewTextView()
+	ui.searchErrorBar.SetBackgroundColor(backgroundColor)
+	ui.searchErrorBar.SetTextColor(alertTextColor)
+
+	ui.helpBar = tview.NewTextView()
+	ui.helpBar.SetBackgroundColor(inverseBackgroundColor)
+	ui.helpBar.SetTextColor(inverseTextColor)
+	ui.helpBar.SetText(" Press Enter for next page or Escape to exit help ")
+
+	ui.loadingBar = NewLoadingBar(ui.triggerDraw)
+
+	ui.pageToMount = NewBucketsView(ui, NewFilter(nil))
+
+	return ui
+}
+
+func (ui *UI) checkFilterExists(typ string) bool {
+	if _, ok := ui.filters[typ]; ok {
+		return true
+	}
+	if _, ok := ui.compositeFilters[typ]; ok {
+		return true
+	}
+	return false
+}
+
+func (ui *UI) AddFilter(
+	typ string,
+	parser func(string) (any, error),
+	helpHint string,
+) error {
+	if ui.checkFilterExists(typ) {
+		return fmt.Errorf("filter %s already exists", typ)
+	}
+	ui.filters[typ] = parser
+	ui.filterHints[typ] = helpHint
+	return nil
+}
+
+func (ui *UI) AddCompositeFilter(
+	typ string,
+	parser func(string) (map[string]any, error),
+	helpHint string,
+) error {
+	if ui.checkFilterExists(typ) {
+		return fmt.Errorf("filter %s already exists", typ)
+	}
+	ui.compositeFilters[typ] = parser
+	ui.filterHints[typ] = helpHint
+	return nil
+}
+
+func (ui *UI) stopOnError(err error) {
+	if err != nil {
+		ui.onStop()
+		ui.app.QueueEvent(tcell.NewEventError(err))
+	}
+}
+
+func (ui *UI) stop() {
+	ui.onStop()
+	ui.app.Stop()
+}
+
+func (ui *UI) movePrevPage() {
+	if len(ui.pageHistory) != 0 {
+		ui.mountedPage.Unmount()
+		ui.mountedPage = ui.pageHistory[len(ui.pageHistory)-1]
+		ui.pageHistory = ui.pageHistory[:len(ui.pageHistory)-1]
+		ui.triggerDraw()
+	}
+}
+
+func (ui *UI) moveNextPage(page Primitive) {
+	ui.pageToMount = page
+	ui.triggerDraw()
+}
+
+func (ui *UI) triggerDraw() {
+	go ui.app.QueueUpdateDraw(func() {})
+}
+
+func (ui *UI) Draw(screen tcell.Screen) {
+	if ui.isLoading.Load() {
+		ui.draw(screen)
+		return
+	}
+
+	ui.isLoading.Store(true)
+
+	ctx, cancel := context.WithCancel(ui.ctx)
+
+	ready := make(chan struct{})
+	go func() {
+		ui.load(ctx)
+
+		cancel()
+		close(ready)
+		ui.isLoading.Store(false)
+	}()
+
+	select {
+	case <-ready:
+	case <-time.After(ui.loadingIndicatorLag):
+		ui.loadingBar.Start(ui.ctx)
+		ui.cancelLoading = cancel
+
+		go func() {
+			<-ready
+			ui.loadingBar.Stop()
+			ui.triggerDraw()
+		}()
+	}
+
+	ui.draw(screen)
+}
+
+func (ui *UI) load(ctx context.Context) {
+	if ui.mountedPage == nil && ui.pageToMount == nil {
+		ui.stop()
+		return
+	}
+
+	if ui.pageToMount != nil {
+		ui.mountAndUpdate(ctx)
+	} else {
+		ui.update(ctx)
+	}
+}
+
+func (ui *UI) draw(screen tcell.Screen) {
+	ui.DrawForSubclass(screen, ui)
+	x, y, width, height := ui.GetInnerRect()
+
+	var (
+		pageToDraw tview.Primitive
+		barToDraw  tview.Primitive
+	)
+
+	switch {
+	case ui.isShowingHelp:
+		pageToDraw = ui.pageStub
+	case ui.mountedPage != nil:
+		pageToDraw = ui.mountedPage
+	default:
+		pageToDraw = ui.pageStub
+	}
+
+	pageToDraw.SetRect(x, y, width, height-1)
+	pageToDraw.Draw(screen)
+
+	// Search bar uses cursor and we need to hide it when another bar is drawn.
+	screen.HideCursor()
+
+	switch {
+	case ui.isLoading.Load():
+		barToDraw = ui.loadingBar
+	case ui.isSearching:
+		barToDraw = ui.searchBar
+	case ui.isShowingError:
+		barToDraw = ui.searchErrorBar
+	case ui.isShowingHelp:
+		barToDraw = ui.helpBar
+	default:
+		barToDraw = ui.infoBar
+	}
+
+	barToDraw.SetRect(x, y+height-1, width, 1)
+	barToDraw.Draw(screen)
+}
+
+func (ui *UI) mountAndUpdate(ctx context.Context) {
+	defer func() {
+		// Operation succeeded or was canceled, either way reset page to mount.
+		ui.pageToMount = nil
+	}()
+
+	// Mount should use app global context.
+	//nolint:contextcheck
+	err := ui.pageToMount.Mount(ui.ctx)
+	if err != nil {
+		ui.stopOnError(err)
+		return
+	}
+
+	x, y, width, height := ui.GetInnerRect()
+	ui.pageToMount.SetRect(x, y, width, height-1)
+
+	s := loadOp(ctx, ui.pageToMount.Update)
+	if s.err != nil {
+		ui.pageToMount.Unmount()
+		ui.stopOnError(s.err)
+		return
+	}
+	// Update was canceled.
+	if !s.done {
+		ui.pageToMount.Unmount()
+		return
+	}
+
+	if ui.mountedPage != nil {
+		ui.pageHistory = append(ui.pageHistory, ui.mountedPage)
+	}
+	ui.mountedPage = ui.pageToMount
+}
+
+func (ui *UI) update(ctx context.Context) {
+	x, y, width, height := ui.GetInnerRect()
+	ui.mountedPage.SetRect(x, y, width, height-1)
+
+	s := loadOp(ctx, ui.mountedPage.Update)
+	if s.err != nil {
+		ui.stopOnError(s.err)
+		return
+	}
+}
+
+type status struct {
+	done bool
+	err  error
+}
+
+func loadOp(ctx context.Context, op func(ctx context.Context) error) status {
+	errCh := make(chan error)
+	go func() {
+		errCh <- op(ctx)
+	}()
+
+	select {
+	case <-ctx.Done():
+		return status{done: false, err: nil}
+	case err := <-errCh:
+		return status{done: true, err: err}
+	}
+}
+
+func (ui *UI) InputHandler() func(event *tcell.EventKey, setFocus func(p tview.Primitive)) {
+	return ui.WrapInputHandler(func(event *tcell.EventKey, _ func(tview.Primitive)) {
+		switch {
+		case ui.isLoading.Load():
+			ui.handleInputOnLoading(event)
+		case ui.isShowingHelp:
+			ui.handleInputOnShowingHelp(event)
+		case ui.isShowingError:
+			ui.handleInputOnShowingError()
+		case ui.isSearching:
+			ui.handleInputOnSearching(event)
+		default:
+			ui.handleInput(event)
+		}
+	})
+}
+
+func (ui *UI) handleInput(event *tcell.EventKey) {
+	m, k, r := event.Modifiers(), event.Key(), event.Rune()
+
+	switch {
+	case k == tcell.KeyEsc:
+		ui.movePrevPage()
+	case m == 0 && k == tcell.KeyRune && r == 'h':
+		ui.isShowingHelp = true
+	case m == 0 && k == tcell.KeyRune && r == '/':
+		ui.isSearching = true
+	case m == 0 && k == tcell.KeyRune && r == 'q':
+		ui.stop()
+	default:
+		if ui.mountedPage != nil {
+			ui.mountedPage.InputHandler()(event, func(tview.Primitive) {})
+		}
+	}
+}
+
+func (ui *UI) handleInputOnLoading(event *tcell.EventKey) {
+	switch k, r := event.Key(), event.Rune(); {
+	case k == tcell.KeyEsc:
+		ui.cancelLoading()
+	case k == tcell.KeyRune && r == 'q':
+		ui.stop()
+	}
+}
+
+func (ui *UI) handleInputOnShowingError() {
+	ui.isShowingError = false
+	ui.isSearching = true
+}
+
+func (ui *UI) handleInputOnShowingHelp(event *tcell.EventKey) {
+	k, r := event.Key(), event.Rune()
+
+	switch {
+	case k == tcell.KeyEsc:
+		ui.isShowingHelp = false
+	case k == tcell.KeyRune && r == 'q':
+		ui.stop()
+	default:
+	}
+}
+
+func (ui *UI) handleInputOnSearching(event *tcell.EventKey) {
+	m, k := event.Modifiers(), event.Key()
+
+	switch {
+	case k == tcell.KeyEnter:
+		prompt := ui.searchBar.GetText()
+
+		res, err := ui.processPrompt(prompt)
+		if err != nil {
+			ui.isShowingError = true
+			ui.isSearching = false
+			ui.searchErrorBar.SetText(err.Error() + " (press any key to continue)")
+			return
+		}
+
+		switch ui.mountedPage.(type) {
+		case *BucketsView:
+			ui.moveNextPage(NewBucketsView(ui, res))
+		case *RecordsView:
+			bucket := ui.mountedPage.(*RecordsView).bucket
+			ui.moveNextPage(NewRecordsView(ui, bucket, res))
+		}
+
+		if ui.searchBar.GetText() != "" {
+			ui.searchBar.AddToHistory(ui.searchBar.GetText())
+		}
+
+		ui.searchBar.SetText("")
+		ui.isSearching = false
+	case k == tcell.KeyEsc:
+		ui.isSearching = false
+	case (k == tcell.KeyBackspace2 || m&tcell.ModCtrl != 0 && k == tcell.KeyETB) && len(ui.searchBar.GetText()) == 0:
+		ui.isSearching = false
+	default:
+		ui.searchBar.InputHandler()(event, func(tview.Primitive) {})
+	}
+
+	ui.Box.MouseHandler()
+}
+
+func (ui *UI) WithPrompt(prompt string) error {
+	filter, err := ui.processPrompt(prompt)
+	if err != nil {
+		return err
+	}
+
+	ui.pageToMount = NewBucketsView(ui, filter)
+
+	if prompt != "" {
+		ui.searchBar.AddToHistory(prompt)
+	}
+
+	return nil
+}
+
+func (ui *UI) processPrompt(prompt string) (filter *Filter, err error) {
+	if prompt == "" {
+		return NewFilter(nil), nil
+	}
+
+	filterMap := make(map[string]any)
+
+	for _, filterString := range strings.Split(prompt, "+") {
+		parts := strings.Split(filterString, ":")
+		if len(parts) != 2 {
+			return nil, errors.New("expected 'tag:value [+ tag:value]...'")
+		}
+
+		filterTag := strings.TrimSpace(parts[0])
+		filterValueString := strings.TrimSpace(parts[1])
+
+		if _, exists := filterMap[filterTag]; exists {
+			return nil, fmt.Errorf("duplicate filter tag '%s'", filterTag)
+		}
+
+		parser, ok := ui.filters[filterTag]
+		if ok {
+			filterValue, err := parser(filterValueString)
+			if err != nil {
+				return nil, fmt.Errorf("can't parse '%s' filter value: %w", filterTag, err)
+			}
+
+			filterMap[filterTag] = filterValue
+			continue
+		}
+
+		compositeParser, ok := ui.compositeFilters[filterTag]
+		if ok {
+			compositeFilterValue, err := compositeParser(filterValueString)
+			if err != nil {
+				return nil, fmt.Errorf(
+					"can't parse '%s' filter value '%s': %w",
+					filterTag, filterValueString, err,
+				)
+			}
+
+			for tag, value := range compositeFilterValue {
+				if _, exists := filterMap[tag]; exists {
+					return nil, fmt.Errorf(
+						"found duplicate filter tag '%s' while processing composite filter with tag '%s'",
+						tag, filterTag,
+					)
+				}
+
+				filterMap[tag] = value
+			}
+			continue
+		}
+
+		return nil, fmt.Errorf("unknown filter tag '%s'", filterTag)
+	}
+
+	return NewFilter(filterMap), nil
+}

cmd/frostfs-lens/internal/tui/util.go

@@ -0,0 +1,97 @@
+package tui
+
+import (
+	"errors"
+	"strings"
+
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/mr-tron/base58"
+)
+
+func CIDParser(s string) (any, error) {
+	data, err := base58.Decode(s)
+	if err != nil {
+		return nil, err
+	}
+	var id cid.ID
+	if err = id.Decode(data); err != nil {
+		return nil, err
+	}
+	return id, nil
+}
+
+func OIDParser(s string) (any, error) {
+	data, err := base58.Decode(s)
+	if err != nil {
+		return nil, err
+	}
+	var id oid.ID
+	if err = id.Decode(data); err != nil {
+		return nil, err
+	}
+	return id, nil
+}
+
+func AddressParser(s string) (map[string]any, error) {
+	m := make(map[string]any)
+
+	parts := strings.Split(s, "/")
+	if len(parts) != 2 {
+		return nil, errors.New("expected <cid>/<oid>")
+	}
+	cnr, err := CIDParser(parts[0])
+	if err != nil {
+		return nil, err
+	}
+	obj, err := OIDParser(parts[1])
+	if err != nil {
+		return nil, err
+	}
+
+	m["cid"] = cnr
+	m["oid"] = obj
+
+	return m, nil
+}
+
+func keyParser(s string) (any, error) {
+	if s == "" {
+		return nil, errors.New("empty attribute key")
+	}
+	return s, nil
+}
+
+func valueParser(s string) (any, error) {
+	if s == "" {
+		return nil, errors.New("empty attribute value")
+	}
+	return s, nil
+}
+
+func AttributeParser(s string) (map[string]any, error) {
+	m := make(map[string]any)
+
+	parts := strings.Split(s, "/")
+	if len(parts) != 1 && len(parts) != 2 {
+		return nil, errors.New("expected <key> or <key>/<value>")
+	}
+
+	key, err := keyParser(parts[0])
+	if err != nil {
+		return nil, err
+	}
+	m["key"] = key
+
+	if len(parts) == 1 {
+		return m, nil
+	}
+
+	value, err := valueParser(parts[1])
+	if err != nil {
+		return nil, err
+	}
+	m["value"] = value
+
+	return m, nil
+}

go.mod

@@ -32,6 +32,7 @@ require (
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/panjf2000/ants/v2 v2.9.0
 	github.com/prometheus/client_golang v1.19.0
+	github.com/rivo/tview v0.0.0-20240625185742-b0a7293b8130
 	github.com/spf13/cast v1.6.0
 	github.com/spf13/cobra v1.8.1
 	github.com/spf13/pflag v1.0.5
@@ -106,7 +107,7 @@ require (
 	github.com/prometheus/client_model v0.5.0 // indirect
 	github.com/prometheus/common v0.48.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
-	github.com/rivo/uniseg v0.4.4 // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/spaolacci/murmur3 v1.1.0 // indirect
 	github.com/spf13/afero v1.11.0 // indirect