From f3bcd190b06c59d1a8c2fe16e982444363886f35 Mon Sep 17 00:00:00 2001
From: ktr <ktr@syfm.me>
Date: Sun, 17 Jan 2021 15:50:47 +0900
Subject: [PATCH] revert the chages which migrates terminal library from
 nsf/termbox-go to gdamore/tcell (#47)

---
 .github/workflows/main.yml                    |   2 +-
 .golangci.yml                                 |   2 +-
 example_test.go                               |  24 +-
 fuzzing_test.go                               | 111 ++++-----
 fuzzyfinder.go                                | 230 +++++-------------
 fuzzyfinder_test.go                           | 188 +++++---------
 go.mod                                        |   8 +-
 go.sum                                        | 126 +++++-----
 helper_test.go                                |   5 +-
 mock.go                                       | 174 +------------
 mock_test.go                                  |  67 -----
 tcell.go                                      |  49 +++-
 .../fixtures/testfind-arrow_left-right.golden |   4 +-
 .../testfind-arrow_left_backspace.golden      |  11 -
 .../fixtures/testfind-arrow_up-down.golden    |   6 +-
 testdata/fixtures/testfind-backspace.golden   |   4 +-
 testdata/fixtures/testfind-backspace2.golden  |   4 +-
 ...ace_doesnt_change_x_if_cursorx_is_0.golden |   6 +-
 .../fixtures/testfind-backspace_empty.golden  |   6 +-
 testdata/fixtures/testfind-ctrl-e.golden      |   4 +-
 testdata/fixtures/testfind-ctrl-u.golden      |   4 +-
 testdata/fixtures/testfind-ctrl-w.golden      |   4 +-
 ...ty.golden => testfind-ctrl-w_emtpy.golden} |   6 +-
 testdata/fixtures/testfind-delete.golden      |   4 +-
 .../fixtures/testfind-delete_empty.golden     |   6 +-
 testdata/fixtures/testfind-initial.golden     |   6 +-
 testdata/fixtures/testfind-input_glow.golden  |   6 +-
 testdata/fixtures/testfind-input_lo.golden    |   6 +-
 testdata/fixtures/testfind-long_item.golden   |   6 +-
 testdata/fixtures/testfind-paging.golden      |   6 +-
 .../fixtures/testfind-tab_doesnt_work.golden  |   6 +-
 testdata/fixtures/testfind_hotreload.golden   |   6 +-
 32 files changed, 361 insertions(+), 736 deletions(-)
 delete mode 100644 testdata/fixtures/testfind-arrow_left_backspace.golden
 rename testdata/fixtures/{testfind-ctrl-w_empty.golden => testfind-ctrl-w_emtpy.golden} (67%)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e0e2cc8..2e9fa0b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -30,7 +30,7 @@ jobs:
       run: go build
 
     - name: Test
-      run: go test -v -coverpkg ./... -covermode atomic -coverprofile coverage.txt -tags fuzz -numCases 3000 -numEvents 10 ./...
+      run: go test -v -coverpkg ./... -covermode atomic -coverprofile coverage.txt -tags fuzz -numCases 3000 -numEvents 300 ./...
 
     - name: Lint
       uses: golangci/golangci-lint-action@v2
diff --git a/.golangci.yml b/.golangci.yml
index d14663d..493d1bc 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -37,13 +37,13 @@ linters:
     - nolintlint
     - rowserrcheck
     - errorlint
-    - exhaustivestruct
     - exportloopref
     - gci
   disable:
     - gosimple
     - unused
     - scopelint
+    - exhaustivestruct
 
 issues:
   exclude:
diff --git a/example_test.go b/example_test.go
index 7b97286..a029944 100644
--- a/example_test.go
+++ b/example_test.go
@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"io/ioutil"
 
-	"github.com/gdamore/tcell/v2"
 	fuzzyfinder "github.com/ktr0731/go-fuzzyfinder"
+	"github.com/nsf/termbox-go"
 )
 
 func ExampleFind() {
@@ -70,14 +70,24 @@ func ExampleFindMulti() {
 }
 
 func ExampleTerminalMock() {
-	// Initialize a mocked terminal.
-	term := fuzzyfinder.UseMockedTerminalV2()
-	keys := "foo"
-	for _, r := range keys {
-		term.InjectKey(tcell.KeyRune, r, tcell.ModNone)
+	keys := func(str string) []termbox.Event {
+		s := []rune(str)
+		e := make([]termbox.Event, 0, len(s))
+		for _, r := range s {
+			e = append(e, termbox.Event{Type: termbox.EventKey, Ch: r})
+		}
+		return e
 	}
-	term.InjectKey(tcell.KeyEsc, rune(tcell.KeyEsc), tcell.ModNone)
 
+	// Initialize a mocked terminal.
+	term := fuzzyfinder.UseMockedTerminal()
+	// Set the window size and events.
+	term.SetSize(60, 10)
+	term.SetEvents(append(
+		keys("foo"),
+		termbox.Event{Type: termbox.EventKey, Key: termbox.KeyEsc})...)
+
+	// Call fuzzyfinder.Find.
 	slice := []string{"foo", "bar", "baz"}
 	_, _ = fuzzyfinder.Find(slice, func(i int) string { return slice[i] })
 
diff --git a/fuzzing_test.go b/fuzzing_test.go
index cb1fdb1..3f3711a 100644
--- a/fuzzing_test.go
+++ b/fuzzing_test.go
@@ -11,56 +11,57 @@ import (
 	"sync"
 	"testing"
 
-	"github.com/gdamore/tcell/v2"
-
 	fuzz "github.com/google/gofuzz"
 	fuzzyfinder "github.com/ktr0731/go-fuzzyfinder"
+	"github.com/nsf/termbox-go"
 )
 
 type fuzzKey struct {
-	key  tcell.Key
+	key  termbox.Key
 	name string
 }
 
 var (
 	letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789一花二乃三玖四葉五月")
-	tbkeys  = []tcell.Key{
-		tcell.KeyCtrlA,
-		tcell.KeyCtrlB,
-		tcell.KeyCtrlE,
-		tcell.KeyCtrlF,
-		tcell.KeyBackspace,
-		tcell.KeyTab,
-		tcell.KeyCtrlJ,
-		tcell.KeyCtrlK,
-		tcell.KeyCtrlN,
-		tcell.KeyCtrlP,
-		tcell.KeyCtrlU,
-		tcell.KeyCtrlW,
-		tcell.KeyBackspace2,
-		tcell.KeyUp,
-		tcell.KeyDown,
-		tcell.KeyLeft,
-		tcell.KeyRight,
+	tbkeys  = []termbox.Key{
+		termbox.KeyCtrlA,
+		termbox.KeyCtrlB,
+		termbox.KeyCtrlE,
+		termbox.KeyCtrlF,
+		termbox.KeyBackspace,
+		termbox.KeyTab,
+		termbox.KeyCtrlJ,
+		termbox.KeyCtrlK,
+		termbox.KeyCtrlN,
+		termbox.KeyCtrlP,
+		termbox.KeyCtrlU,
+		termbox.KeyCtrlW,
+		termbox.KeySpace,
+		termbox.KeyBackspace2,
+		termbox.KeyArrowUp,
+		termbox.KeyArrowDown,
+		termbox.KeyArrowLeft,
+		termbox.KeyArrowRight,
 	}
-	keyMap = map[tcell.Key]string{
-		tcell.KeyCtrlA:      "A",
-		tcell.KeyCtrlB:      "B",
-		tcell.KeyCtrlE:      "E",
-		tcell.KeyCtrlF:      "F",
-		tcell.KeyBackspace:  "backspace",
-		tcell.KeyTab:        "tab",
-		tcell.KeyCtrlJ:      "J",
-		tcell.KeyCtrlK:      "K",
-		tcell.KeyCtrlN:      "N",
-		tcell.KeyCtrlP:      "P",
-		tcell.KeyCtrlU:      "U",
-		tcell.KeyCtrlW:      "W",
-		tcell.KeyBackspace2: "backspace2",
-		tcell.KeyUp:         "up",
-		tcell.KeyDown:       "down",
-		tcell.KeyLeft:       "left",
-		tcell.KeyRight:      "right",
+	keyMap = map[termbox.Key]string{
+		termbox.KeyCtrlA:      "A",
+		termbox.KeyCtrlB:      "B",
+		termbox.KeyCtrlE:      "E",
+		termbox.KeyCtrlF:      "F",
+		termbox.KeyBackspace:  "backspace",
+		termbox.KeyTab:        "tab",
+		termbox.KeyCtrlJ:      "J",
+		termbox.KeyCtrlK:      "K",
+		termbox.KeyCtrlN:      "N",
+		termbox.KeyCtrlP:      "P",
+		termbox.KeyCtrlU:      "U",
+		termbox.KeyCtrlW:      "W",
+		termbox.KeySpace:      "space",
+		termbox.KeyBackspace2: "backspace2",
+		termbox.KeyArrowUp:    "up",
+		termbox.KeyArrowDown:  "down",
+		termbox.KeyArrowLeft:  "left",
+		termbox.KeyArrowRight: "right",
 	}
 )
 
@@ -68,14 +69,14 @@ var (
 	out       = flag.String("fuzzout", "fuzz.out", "fuzzing error cases")
 	hotReload = flag.Bool("hotreload", false, "enable hot-reloading")
 	numCases  = flag.Int("numCases", 30, "number of test cases")
-	numEvents = flag.Int("numEvents", 10, "number of events")
+	numEvents = flag.Int("numEvents", 100, "number of events")
 )
 
 // TestFuzz executes fuzzing tests.
 //
 // Example:
 //
-//   go test -tags fuzz -run TestFuzz -numCases 10 -numEvents 10
+//   go test -tags fuzz -run TestFuzz -numCases 1000 -numEvents 100
 //
 func TestFuzz(t *testing.T) {
 	f, err := os.Create(*out)
@@ -86,32 +87,25 @@ func TestFuzz(t *testing.T) {
 
 	fuzz := fuzz.New()
 
-	min := func(a, b int) int {
-		if a < b {
-			return a
-		}
-		return b
-	}
-
 	for i := 0; i < rand.Intn(*numCases)+10; i++ {
-		// number of events in tcell.SimulationScreen is limited 10
-		n := rand.Intn(min(*numEvents, 10))
-		events := make([]tcell.Event, n)
+		n := rand.Intn(*numEvents) + 10
+		events := make([]termbox.Event, n)
 		for i := 0; i < n; i++ {
 			if rand.Intn(10) > 3 {
 				events[i] = ch(letters[rand.Intn(len(letters)-1)])
 			} else {
-				k := tbkeys[rand.Intn(len(tbkeys)-1)]
-				events[i] = key(input{k, rune(k), tcell.ModNone})
+				events[i] = key(tbkeys[rand.Intn(len(tbkeys)-1)])
 			}
 		}
 
 		var name string
 		for _, e := range events {
-			if e.(*tcell.EventKey).Rune() != 0 {
-				name += string(e.(*tcell.EventKey).Rune())
+			if e.Key == termbox.KeySpace {
+				name += " "
+			} else if e.Ch != 0 {
+				name += string(e.Ch)
 			} else {
-				name += "[" + keyMap[e.(*tcell.EventKey).Key()] + "]"
+				name += "[" + keyMap[e.Key] + "]"
 			}
 		}
 
@@ -128,9 +122,8 @@ func TestFuzz(t *testing.T) {
 			tracks := tracks
 
 			f, term := fuzzyfinder.NewWithMockedTerminal()
-			events = append(events, key(input{tcell.KeyEsc, rune(tcell.KeyEsc), tcell.ModNone}))
-
-			term.SetEventsV2(events...)
+			events = append(events, key(termbox.KeyEsc))
+			term.SetEvents(events...)
 
 			var (
 				iface     interface{}
diff --git a/fuzzyfinder.go b/fuzzyfinder.go
index 0974760..2fb196d 100644
--- a/fuzzyfinder.go
+++ b/fuzzyfinder.go
@@ -15,10 +15,9 @@ import (
 	"unicode"
 	"unicode/utf8"
 
-	"github.com/gdamore/tcell/v2"
 	"github.com/ktr0731/go-fuzzyfinder/matching"
 	runewidth "github.com/mattn/go-runewidth"
-	"github.com/micmonay/keybd_event"
+	"github.com/nsf/termbox-go"
 	"github.com/pkg/errors"
 )
 
@@ -71,16 +70,11 @@ type finder struct {
 
 func (f *finder) initFinder(items []string, matched []matching.Matched, opt opt) error {
 	if f.term == nil {
-		screen, err := tcell.NewScreen()
-		if err != nil {
-			return errors.Wrap(err, "failed to new screen")
-		}
-		f.term = &termImpl{
-			screen: screen,
-		}
-		if err := f.term.Init(); err != nil {
-			return errors.Wrap(err, "failed to initialize screen")
-		}
+		f.term = &termImpl{}
+	}
+
+	if err := f.term.init(); err != nil {
+		return errors.Wrap(err, "failed to initialize termbox")
 	}
 
 	f.opt = &opt
@@ -97,7 +91,7 @@ func (f *finder) initFinder(items []string, matched []matching.Matched, opt opt)
 		f.drawTimer = time.AfterFunc(0, func() {
 			f._draw()
 			f._drawPreview()
-			f.term.Show()
+			f.term.flush()
 		})
 		f.drawTimer.Stop()
 	}
@@ -116,8 +110,8 @@ func (f *finder) updateItems(items []string, matched []matching.Matched) {
 
 // _draw is used from draw with a timer.
 func (f *finder) _draw() {
-	width, height := f.term.Size()
-	f.term.Clear()
+	width, height := f.term.size()
+	_ = f.term.clear(termbox.ColorDefault, termbox.ColorDefault)
 
 	maxWidth := width
 	if f.opt.previewFunc != nil {
@@ -129,34 +123,21 @@ func (f *finder) _draw() {
 
 	//nolint:staticcheck
 	for _, r := range []rune(f.opt.promptString) {
-		style := tcell.StyleDefault.
-			Foreground(tcell.ColorBlue).
-			Background(tcell.ColorDefault)
-
-		f.term.SetContent(promptLinePad, height-1, r, nil, style)
+		f.term.setCell(promptLinePad, height-1, r, termbox.ColorBlue, termbox.ColorDefault)
 		promptLinePad++
 	}
 	var r rune
 	var w int
 	for _, r = range f.state.input {
-		style := tcell.StyleDefault.
-			Foreground(tcell.ColorDefault).
-			Background(tcell.ColorDefault).
-			Bold(true)
-
 		// Add a space between '>' and runes.
-		f.term.SetContent(promptLinePad+w, height-1, r, nil, style)
+		f.term.setCell(promptLinePad+w, height-1, r, termbox.ColorDefault|termbox.AttrBold, termbox.ColorDefault)
 		w += runewidth.RuneWidth(r)
 	}
-	f.term.ShowCursor(promptLinePad+f.state.cursorX, height-1)
+	f.term.setCursor(promptLinePad+f.state.cursorX, height-1)
 
 	// Number line
 	for i, r := range fmt.Sprintf("%d/%d", len(f.state.matched), len(f.state.items)) {
-		style := tcell.StyleDefault.
-			Foreground(tcell.ColorYellow).
-			Background(tcell.ColorDefault)
-
-		f.term.SetContent(2+i, height-2, r, nil, style)
+		f.term.setCell(2+i, height-2, r, termbox.ColorYellow, termbox.ColorDefault)
 	}
 
 	// Item lines
@@ -172,66 +153,44 @@ func (f *finder) _draw() {
 			break
 		}
 		if i == f.state.cursorY {
-			style := tcell.StyleDefault.
-				Foreground(tcell.ColorRed).
-				Background(tcell.ColorBlack)
-
-			f.term.SetContent(0, height-3-i, '>', nil, style)
-			f.term.SetContent(1, height-3-i, ' ', nil, style)
+			f.term.setCell(0, height-3-i, '>', termbox.ColorRed, termbox.ColorBlack)
+			f.term.setCell(1, height-3-i, ' ', termbox.ColorRed, termbox.ColorBlack)
 		}
 
 		if f.opt.multi {
 			if _, ok := f.state.selection[m.Idx]; ok {
-				style := tcell.StyleDefault.
-					Foreground(tcell.ColorRed).
-					Background(tcell.ColorBlack)
-
-				f.term.SetContent(1, height-3-i, '>', nil, style)
+				f.term.setCell(1, height-3-i, '>', termbox.ColorRed, termbox.ColorBlack)
 			}
 		}
 
 		var posIdx int
 		w := 2
 		for j, r := range []rune(f.state.items[m.Idx]) {
-			style := tcell.StyleDefault.
-				Foreground(tcell.ColorDefault).
-				Background(tcell.ColorDefault)
+			fg := termbox.ColorDefault
+			bg := termbox.ColorDefault
 			// Highlight selected strings.
-			hasHighlighted := false
 			if posIdx < len(f.state.input) {
 				from, to := m.Pos[0], m.Pos[1]
 				if !(from == -1 && to == -1) && (from <= j && j <= to) {
 					if unicode.ToLower(f.state.input[posIdx]) == unicode.ToLower(r) {
-						style = tcell.StyleDefault.
-							Foreground(tcell.ColorGreen).
-							Background(tcell.ColorDefault)
-						hasHighlighted = true
+						fg |= termbox.ColorGreen
 						posIdx++
 					}
 				}
 			}
 			if i == f.state.cursorY {
-				if hasHighlighted {
-					style = tcell.StyleDefault.
-						Foreground(tcell.ColorDarkCyan).
-						Bold(true).
-						Background(tcell.ColorBlack)
-				} else {
-					style = tcell.StyleDefault.
-						Foreground(tcell.ColorYellow).
-						Bold(true).
-						Background(tcell.ColorBlack)
-				}
+				fg |= termbox.AttrBold | termbox.ColorYellow
+				bg = termbox.ColorBlack
 			}
 
 			rw := runewidth.RuneWidth(r)
 			// Shorten item cells.
 			if w+rw+2 > maxWidth {
-				f.term.SetContent(w, height-3-i, '.', nil, style)
-				f.term.SetContent(w+1, height-3-i, '.', nil, style)
+				f.term.setCell(w, height-3-i, '.', fg, bg)
+				f.term.setCell(w+1, height-3-i, '.', fg, bg)
 				break
 			} else {
-				f.term.SetContent(w, height-3-i, r, nil, style)
+				f.term.setCell(w, height-3-i, r, fg, bg)
 				w += rw
 			}
 		}
@@ -243,7 +202,7 @@ func (f *finder) _drawPreview() {
 		return
 	}
 
-	width, height := f.term.Size()
+	width, height := f.term.size()
 	var idx int
 	if len(f.state.matched) == 0 {
 		idx = -1
@@ -268,12 +227,7 @@ func (f *finder) _drawPreview() {
 		default:
 			r = '─'
 		}
-
-		style := tcell.StyleDefault.
-			Foreground(tcell.ColorBlack).
-			Background(tcell.ColorDefault)
-
-		f.term.SetContent(i, 0, r, nil, style)
+		f.term.setCell(i, 0, r, termbox.ColorBlack, termbox.ColorDefault)
 	}
 	// bottom line
 	for i := width / 2; i < width; i++ {
@@ -286,12 +240,7 @@ func (f *finder) _drawPreview() {
 		default:
 			r = '─'
 		}
-
-		style := tcell.StyleDefault.
-			Foreground(tcell.ColorBlack).
-			Background(tcell.ColorDefault)
-
-		f.term.SetContent(i, height-1, r, nil, style)
+		f.term.setCell(i, height-1, r, termbox.ColorBlack, termbox.ColorDefault)
 	}
 	// Start with h=1 to exclude each corner rune.
 	const vline = '│'
@@ -302,25 +251,15 @@ func (f *finder) _drawPreview() {
 			switch {
 			// Left vertical line.
 			case i == width/2:
-				style := tcell.StyleDefault.
-					Foreground(tcell.ColorBlack).
-					Background(tcell.ColorDefault)
-				f.term.SetContent(i, h, vline, nil, style)
+				f.term.setCell(i, h, vline, termbox.ColorBlack, termbox.ColorDefault)
 				w += wvline
 			// Right vertical line.
 			case i == width-1:
-				style := tcell.StyleDefault.
-					Foreground(tcell.ColorBlack).
-					Background(tcell.ColorDefault)
-				f.term.SetContent(i, h, vline, nil, style)
+				f.term.setCell(i, h, vline, termbox.ColorBlack, termbox.ColorDefault)
 				w += wvline
 			// Spaces between left and right vertical lines.
 			case w == width/2+wvline, w == width-1-wvline:
-				style := tcell.StyleDefault.
-					Foreground(tcell.ColorDefault).
-					Background(tcell.ColorDefault)
-
-				f.term.SetContent(w, h, ' ', nil, style)
+				f.term.setCell(w, h, ' ', termbox.ColorDefault, termbox.ColorDefault)
 				w++
 			default: // Preview text
 				if h-1 >= len(prevLines) {
@@ -335,21 +274,13 @@ func (f *finder) _drawPreview() {
 				}
 				rw := runewidth.RuneWidth(l[j])
 				if w+rw > width-1-2 {
-					style := tcell.StyleDefault.
-						Foreground(tcell.ColorDefault).
-						Background(tcell.ColorDefault)
-
-					f.term.SetContent(w, h, '.', nil, style)
-					f.term.SetContent(w+1, h, '.', nil, style)
-
+					f.term.setCell(w, h, '.', termbox.ColorDefault, termbox.ColorDefault)
+					f.term.setCell(w+1, h, '.', termbox.ColorDefault, termbox.ColorDefault)
 					w += 2
 					continue
 				}
 
-				style := tcell.StyleDefault.
-					Foreground(tcell.ColorDefault).
-					Background(tcell.ColorDefault)
-				f.term.SetContent(w, h, l[j], nil, style)
+				f.term.setCell(w, h, l[j], termbox.ColorDefault, termbox.ColorDefault)
 				w += rw
 			}
 		}
@@ -364,7 +295,7 @@ func (f *finder) draw(d time.Duration) {
 		// Don't use goroutine scheduling.
 		f._draw()
 		f._drawPreview()
-		f.term.Show()
+		f.term.flush()
 	} else {
 		f.drawTimer.Reset(d)
 	}
@@ -386,16 +317,16 @@ func (f *finder) readKey() error {
 		}
 	}()
 
-	e := f.term.PollEvent()
+	e := f.term.pollEvent()
 	f.stateMu.Lock()
 	defer f.stateMu.Unlock()
 
-	switch e := e.(type) {
-	case *tcell.EventKey:
-		switch e.Key() {
-		case tcell.KeyEsc, tcell.KeyCtrlC, tcell.KeyCtrlD:
+	switch e.Type {
+	case termbox.EventKey:
+		switch e.Key {
+		case termbox.KeyEsc, termbox.KeyCtrlC, termbox.KeyCtrlD:
 			return ErrAbort
-		case tcell.KeyBackspace, tcell.KeyBackspace2:
+		case termbox.KeyBackspace, termbox.KeyBackspace2:
 			if len(f.state.input) == 0 {
 				return nil
 			}
@@ -406,32 +337,32 @@ func (f *finder) readKey() error {
 			f.state.cursorX -= runewidth.RuneWidth(f.state.input[x-1])
 			f.state.x--
 			f.state.input = append(f.state.input[:x-1], f.state.input[x:]...)
-		case tcell.KeyDelete:
+		case termbox.KeyDelete:
 			if f.state.x == len(f.state.input) {
 				return nil
 			}
 			x := f.state.x
 
 			f.state.input = append(f.state.input[:x], f.state.input[x+1:]...)
-		case tcell.KeyEnter:
+		case termbox.KeyEnter:
 			return errEntered
-		case tcell.KeyLeft, tcell.KeyCtrlB:
+		case termbox.KeyArrowLeft, termbox.KeyCtrlB:
 			if f.state.x > 0 {
 				f.state.cursorX -= runewidth.RuneWidth(f.state.input[f.state.x-1])
 				f.state.x--
 			}
-		case tcell.KeyRight, tcell.KeyCtrlF:
+		case termbox.KeyArrowRight, termbox.KeyCtrlF:
 			if f.state.x < len(f.state.input) {
 				f.state.cursorX += runewidth.RuneWidth(f.state.input[f.state.x])
 				f.state.x++
 			}
-		case tcell.KeyCtrlA:
+		case termbox.KeyCtrlA:
 			f.state.cursorX = 0
 			f.state.x = 0
-		case tcell.KeyCtrlE:
+		case termbox.KeyCtrlE:
 			f.state.cursorX = runewidth.StringWidth(string(f.state.input))
 			f.state.x = len(f.state.input)
-		case tcell.KeyCtrlW:
+		case termbox.KeyCtrlW:
 			in := f.state.input[:f.state.x]
 			inStr := string(in)
 			pos := strings.LastIndex(strings.TrimRightFunc(inStr, unicode.IsSpace), " ")
@@ -446,26 +377,26 @@ func (f *finder) readKey() error {
 			f.state.input = newIn
 			f.state.cursorX = runewidth.StringWidth(string(newIn))
 			f.state.x = len(newIn)
-		case tcell.KeyCtrlU:
+		case termbox.KeyCtrlU:
 			f.state.input = f.state.input[f.state.x:]
 			f.state.cursorX = 0
 			f.state.x = 0
-		case tcell.KeyUp, tcell.KeyCtrlK, tcell.KeyCtrlP:
+		case termbox.KeyArrowUp, termbox.KeyCtrlK, termbox.KeyCtrlP:
 			if f.state.y+1 < len(f.state.matched) {
 				f.state.y++
 			}
-			_, height := f.term.Size()
+			_, height := f.term.size()
 			if f.state.cursorY+1 < height-2 && f.state.cursorY+1 < len(f.state.matched) {
 				f.state.cursorY++
 			}
-		case tcell.KeyDown, tcell.KeyCtrlJ, tcell.KeyCtrlN:
+		case termbox.KeyArrowDown, termbox.KeyCtrlJ, termbox.KeyCtrlN:
 			if f.state.y > 0 {
 				f.state.y--
 			}
 			if f.state.cursorY-1 >= 0 {
 				f.state.cursorY--
 			}
-		case tcell.KeyTab:
+		case termbox.KeyTab:
 			if !f.opt.multi {
 				return nil
 			}
@@ -483,8 +414,11 @@ func (f *finder) readKey() error {
 				f.state.cursorY--
 			}
 		default:
-			if e.Rune() != 0 {
-				width, _ := f.term.Size()
+			if e.Key == termbox.KeySpace {
+				e.Ch = ' '
+			}
+			if e.Ch != 0 {
+				width, _ := f.term.size()
 				maxLineWidth := width - 2 - 1
 				if len(f.state.input)+1 > maxLineWidth {
 					// Discard inputted rune.
@@ -492,15 +426,17 @@ func (f *finder) readKey() error {
 				}
 
 				x := f.state.x
-				f.state.input = append(f.state.input[:x], append([]rune{e.Rune()}, f.state.input[x:]...)...)
-				f.state.cursorX += runewidth.RuneWidth(e.Rune())
+				f.state.input = append(f.state.input[:x], append([]rune{e.Ch}, f.state.input[x:]...)...)
+				f.state.cursorX += runewidth.RuneWidth(e.Ch)
 				f.state.x++
 			}
 		}
-	case *tcell.EventResize:
-		f.term.Clear()
+	case termbox.EventResize:
+		// To get the actual window size, clear all buffers.
+		// See termbox.Clear's documentation for more details.
+		_ = f.term.clear(termbox.ColorDefault, termbox.ColorDefault)
 
-		width, height := f.term.Size()
+		width, height := f.term.size()
 		itemAreaHeight := height - 2 - 1
 		if itemAreaHeight >= 0 && f.state.cursorY > itemAreaHeight {
 			f.state.cursorY = itemAreaHeight
@@ -620,10 +556,7 @@ func (f *finder) find(slice interface{}, itemFunc func(i int) string, opts []Opt
 	if err := f.initFinder(items, matched, opt); err != nil {
 		return nil, errors.Wrap(err, "failed to initialize the fuzzy finder")
 	}
-
-	if !isInTesting() {
-		defer f.term.Fini()
-	}
+	defer f.term.close()
 
 	close(inited)
 
@@ -643,10 +576,6 @@ func (f *finder) find(slice interface{}, itemFunc func(i int) string, opts []Opt
 		f.draw(10 * time.Millisecond)
 
 		err := f.readKey()
-		// hack for earning time to filter exec
-		if isInTesting() {
-			time.Sleep(50 * time.Millisecond)
-		}
 		switch {
 		case errors.Is(err, ErrAbort):
 			return nil, ErrAbort
@@ -678,21 +607,6 @@ func (f *finder) find(slice interface{}, itemFunc func(i int) string, opts []Opt
 	}
 }
 
-// This method avoid tcell bug https://github.com/gdamore/tcell/issues/194
-// Additional EOL event is sent to ensure, consequent events, are correctly handled.
-func sendExtraEventFix() error {
-	kb, err := keybd_event.NewKeyBonding()
-	if err != nil {
-		return err
-	}
-	kb.SetKeys(keybd_event.VK_ENTER)
-	err = kb.Launching()
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
 // Find displays a UI that provides fuzzy finding against the provided slice.
 // The argument slice must be of a slice type. If not, Find returns
 // an error. itemFunc is called by the length of slice. previewFunc is called
@@ -709,12 +623,6 @@ func Find(slice interface{}, itemFunc func(i int) string, opts ...Option) (int,
 
 func (f *finder) Find(slice interface{}, itemFunc func(i int) string, opts ...Option) (int, error) {
 	res, err := f.find(slice, itemFunc, opts)
-	if !isInTesting() {
-		if err := sendExtraEventFix(); err != nil {
-			return 0, err
-		}
-	}
-
 	if err != nil {
 		return 0, err
 	}
@@ -729,13 +637,7 @@ func FindMulti(slice interface{}, itemFunc func(i int) string, opts ...Option) (
 
 func (f *finder) FindMulti(slice interface{}, itemFunc func(i int) string, opts ...Option) ([]int, error) {
 	opts = append(opts, withMulti())
-	res, err := f.find(slice, itemFunc, opts)
-	if !isInTesting() {
-		if err := sendExtraEventFix(); err != nil {
-			return nil, err
-		}
-	}
-	return res, err
+	return f.find(slice, itemFunc, opts)
 }
 
 func isInTesting() bool {
diff --git a/fuzzyfinder_test.go b/fuzzyfinder_test.go
index fc0f7ec..7ebc564 100644
--- a/fuzzyfinder_test.go
+++ b/fuzzyfinder_test.go
@@ -12,9 +12,9 @@ import (
 	"testing"
 	"time"
 
-	"github.com/gdamore/tcell/v2"
 	"github.com/google/go-cmp/cmp"
 	fuzzyfinder "github.com/ktr0731/go-fuzzyfinder"
+	"github.com/nsf/termbox-go"
 	"github.com/pkg/errors"
 )
 
@@ -119,85 +119,38 @@ func TestReal(t *testing.T) {
 
 func TestFind(t *testing.T) {
 	cases := map[string]struct {
-		events []tcell.Event
+		events []termbox.Event
 	}{
-		"initial":    {},
-		"input lo":   {runes("lo")},
-		"input glow": {runes("glow")},
-		"arrow up-down": {keys([]input{
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyDown, rune(tcell.KeyDown), tcell.ModNone},
-		}...)},
-		"arrow left-right": {append(runes("ゆるふわ樹海"), keys([]input{
-			{tcell.KeyLeft, rune(tcell.KeyLeft), tcell.ModNone},
-			{tcell.KeyLeft, rune(tcell.KeyLeft), tcell.ModNone},
-			{tcell.KeyRight, rune(tcell.KeyRight), tcell.ModNone},
-		}...)...)},
-		"backspace": {append(runes("adr .-"), keys([]input{
-			{tcell.KeyBackspace, rune(tcell.KeyBackspace), tcell.ModNone},
-			{tcell.KeyBackspace, rune(tcell.KeyBackspace), tcell.ModNone},
-		}...)...)},
-		"backspace empty": {keys(input{tcell.KeyBackspace2, rune(tcell.KeyBackspace2), tcell.ModNone})},
-		"backspace2": {append(runes("オレンジ"), keys([]input{
-			{tcell.KeyBackspace2, rune(tcell.KeyBackspace2), tcell.ModNone},
-			{tcell.KeyBackspace2, rune(tcell.KeyBackspace2), tcell.ModNone},
-		}...)...)},
-		"arrow left backspace": {append(runes("オレンジ"), keys([]input{
-			{tcell.KeyLeft, rune(tcell.KeyLeft), tcell.ModNone},
-			{tcell.KeyBackspace, rune(tcell.KeyBackspace), tcell.ModNone},
-		}...)...)},
-		"delete": {append(runes("オレンジ"), keys([]input{
-			{tcell.KeyCtrlA, 'A', tcell.ModCtrl},
-			{tcell.KeyDelete, rune(tcell.KeyDelete), tcell.ModNone},
-		}...)...)},
-		"delete empty": {keys([]input{
-			{tcell.KeyCtrlA, 'A', tcell.ModCtrl},
-			{tcell.KeyDelete, rune(tcell.KeyDelete), tcell.ModNone},
-		}...)},
-		"ctrl-e": {append(runes("恋をしたのは"), keys([]input{
-			{tcell.KeyCtrlA, 'A', tcell.ModCtrl},
-			{tcell.KeyCtrlE, 'E', tcell.ModCtrl},
-		}...)...)},
-		"ctrl-w":       {append(runes("ハロ / ハワユ"), keys(input{tcell.KeyCtrlW, 'W', tcell.ModCtrl})...)},
-		"ctrl-w empty": {keys(input{tcell.KeyCtrlW, 'W', tcell.ModCtrl})},
-		"ctrl-u": {append(runes("恋をしたのは"), keys([]input{
-			{tcell.KeyLeft, rune(tcell.KeyLeft), tcell.ModNone},
-			{tcell.KeyCtrlU, 'U', tcell.ModCtrl},
-			{tcell.KeyRight, rune(tcell.KeyRight), tcell.ModNone},
-		}...)...)},
-		"long item": {keys([]input{
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-		}...)},
-		"paging": {keys([]input{
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-		}...)},
-		"tab doesn't work": {keys(input{tcell.KeyTab, rune(tcell.KeyTab), tcell.ModNone})},
-		"backspace doesnt change x if cursorX is 0": {append(runes("a"), keys([]input{
-			{tcell.KeyCtrlA, 'A', tcell.ModCtrl},
-			{tcell.KeyBackspace, rune(tcell.KeyBackspace), tcell.ModNone},
-			{tcell.KeyCtrlF, 'F', tcell.ModCtrl},
-		}...)...)},
+		"initial":          {},
+		"input lo":         {runes("lo")},
+		"input glow":       {runes("glow")},
+		"arrow up-down":    {keys(termbox.KeyArrowUp, termbox.KeyArrowUp, termbox.KeyArrowDown)},
+		"arrow left-right": {append(runes("ゆるふわ樹海ガール"), keys(termbox.KeyArrowLeft, termbox.KeyArrowLeft, termbox.KeyArrowLeft, termbox.KeyArrowRight)...)},
+		"backspace":        {append(runes("adrenaline!!! -TV Ver.-"), keys(termbox.KeyBackspace, termbox.KeyBackspace, termbox.KeyArrowLeft, termbox.KeyArrowLeft, termbox.KeyBackspace)...)},
+		"backspace empty":  {keys(termbox.KeyBackspace2, termbox.KeyBackspace2)},
+		"backspace2":       {append(runes("オレンジ"), keys(termbox.KeyBackspace2, termbox.KeyBackspace2)...)},
+		"delete":           {append(runes("オレンジ"), keys(termbox.KeyCtrlA, termbox.KeyDelete)...)},
+		"delete empty":     {keys(termbox.KeyCtrlA, termbox.KeyDelete)},
+		"ctrl-e":           {append(runes("恋をしたのは"), keys(termbox.KeyCtrlA, termbox.KeyCtrlE)...)},
+		"ctrl-w":           {append(runes("ハロ / ハワユ"), key(termbox.KeyCtrlW))},
+		"ctrl-w emtpy":     {keys(termbox.KeyCtrlW)},
+		"ctrl-u":           {append(runes("恋をしたのは"), keys(termbox.KeyArrowLeft, termbox.KeyCtrlU, termbox.KeyArrowRight)...)},
+		"long item":        {keys(termbox.KeyArrowUp, termbox.KeyArrowUp, termbox.KeyArrowUp)},
+		"paging":           {keys(termbox.KeyArrowUp, termbox.KeyArrowUp, termbox.KeyArrowUp, termbox.KeyArrowUp, termbox.KeyArrowUp, termbox.KeyArrowUp, termbox.KeyArrowUp, termbox.KeyArrowUp)},
+		"tab doesn't work": {keys(termbox.KeyTab)},
+		"backspace doesnt change x if cursorX is 0": {append(runes("a"), keys(termbox.KeyCtrlA, termbox.KeyBackspace, termbox.KeyCtrlF)...)},
 	}
 
 	for name, c := range cases {
 		c := c
 
 		t.Run(name, func(t *testing.T) {
+			c := c
 			events := c.events
 
 			f, term := fuzzyfinder.NewWithMockedTerminal()
-			events = append(events, key(input{tcell.KeyEsc, rune(tcell.KeyEsc), tcell.ModNone}))
-			term.SetEventsV2(events...)
+			events = append(events, key(termbox.KeyEsc))
+			term.SetEvents(events...)
 
 			assertWithGolden(t, func(t *testing.T) string {
 				_, err := f.Find(
@@ -217,8 +170,7 @@ func TestFind(t *testing.T) {
 					t.Fatalf("Find must return ErrAbort, but got '%s'", err)
 				}
 
-				res := term.GetResult()
-				return res
+				return term.GetResult()
 			})
 		})
 	}
@@ -226,8 +178,8 @@ func TestFind(t *testing.T) {
 
 func TestFind_hotReload(t *testing.T) {
 	f, term := fuzzyfinder.NewWithMockedTerminal()
-	events := append(runes("adrena"), keys(input{tcell.KeyEsc, rune(tcell.KeyEsc), tcell.ModNone})...)
-	term.SetEventsV2(events...)
+	events := append(runes("adrena"), keys(termbox.KeyEsc)...)
+	term.SetEvents(events...)
 
 	var mu sync.Mutex
 	assertWithGolden(t, func(t *testing.T) string {
@@ -255,18 +207,17 @@ func TestFind_hotReload(t *testing.T) {
 			t.Fatalf("Find must return ErrAbort, but got '%s'", err)
 		}
 
-		res := term.GetResult()
-		return res
+		return term.GetResult()
 	})
 }
 
 func TestFind_enter(t *testing.T) {
 	cases := map[string]struct {
-		events   []tcell.Event
+		events   []termbox.Event
 		expected int
 	}{
-		"initial":                      {events: keys(input{tcell.KeyTab, rune(tcell.KeyTab), tcell.ModNone}), expected: 0},
-		"mode smart to case-sensitive": {events: runes("JI"), expected: 7},
+		"initial":                      {events: keys(termbox.KeyTab), expected: 0},
+		"mode smart to case-sensitive": {events: runes("CHI"), expected: 7},
 	}
 
 	for name, c := range cases {
@@ -276,8 +227,8 @@ func TestFind_enter(t *testing.T) {
 			events := c.events
 
 			f, term := fuzzyfinder.NewWithMockedTerminal()
-			events = append(events, key(input{tcell.KeyEnter, rune(tcell.KeyEnter), tcell.ModNone}))
-			term.SetEventsV2(events...)
+			events = append(events, key(termbox.KeyEnter))
+			term.SetEvents(events...)
 
 			idx, err := f.Find(
 				tracks,
@@ -285,7 +236,6 @@ func TestFind_enter(t *testing.T) {
 					return tracks[i].Name
 				},
 			)
-
 			if err != nil {
 				t.Fatalf("Find must not return an error, but got '%s'", err)
 			}
@@ -316,29 +266,16 @@ func TestFind_error(t *testing.T) {
 
 func TestFindMulti(t *testing.T) {
 	cases := map[string]struct {
-		events   []tcell.Event
+		events   []termbox.Event
 		expected []int
 		abort    bool
 	}{
-		"input glow": {events: runes("glow"), expected: []int{0}},
-		"select two items": {events: keys([]input{
-			{tcell.KeyTab, rune(tcell.KeyTab), tcell.ModNone},
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyTab, rune(tcell.KeyTab), tcell.ModNone},
-		}...), expected: []int{0, 1}},
-		"select two items with another order": {events: keys([]input{
-			{tcell.KeyUp, rune(tcell.KeyUp), tcell.ModNone},
-			{tcell.KeyTab, rune(tcell.KeyTab), tcell.ModNone},
-			{tcell.KeyTab, rune(tcell.KeyTab), tcell.ModNone},
-		}...), expected: []int{1, 0}},
-		"toggle": {events: keys([]input{
-			{tcell.KeyTab, rune(tcell.KeyTab), tcell.ModNone},
-			{tcell.KeyTab, rune(tcell.KeyTab), tcell.ModNone},
-		}...), expected: []int{0}},
-		"empty result": {events: runes("fffffff"), abort: true},
-		"resize window": {events: []tcell.Event{
-			tcell.NewEventResize(10, 10),
-		}, expected: []int{0}},
+		"input glow":                          {events: runes("glow"), expected: []int{0}},
+		"select two items":                    {events: keys(termbox.KeyTab, termbox.KeyArrowUp, termbox.KeyTab), expected: []int{0, 1}},
+		"select two items with another order": {events: keys(termbox.KeyArrowUp, termbox.KeyTab, termbox.KeyTab), expected: []int{1, 0}},
+		"toggle":                              {events: keys(termbox.KeyTab, termbox.KeyTab), expected: []int{0}},
+		"empty result":                        {events: runes("ffffffffffffff"), abort: true},
+		"resize window":                       {events: []termbox.Event{termbox.Event{Type: termbox.EventResize}}, expected: []int{0}},
 	}
 	for name, c := range cases {
 		c := c
@@ -347,8 +284,8 @@ func TestFindMulti(t *testing.T) {
 			events := c.events
 
 			f, term := fuzzyfinder.NewWithMockedTerminal()
-			events = append(events, key(input{tcell.KeyEnter, rune(tcell.KeyEnter), tcell.ModNone}))
-			term.SetEventsV2(events...)
+			events = append(events, key(termbox.KeyEnter))
+			term.SetEvents(events...)
 
 			idxs, err := f.FindMulti(
 				tracks,
@@ -385,9 +322,7 @@ func BenchmarkFind(b *testing.B) {
 		b.ResetTimer()
 		for i := 0; i < b.N; i++ {
 			f, term := fuzzyfinder.NewWithMockedTerminal()
-			events := append(runes("adrele!!"), key(input{tcell.KeyEsc, rune(tcell.KeyEsc), tcell.ModNone}))
-			term.SetEventsV2(events...)
-
+			term.SetEvents(append(runes("adrele!!"), key(termbox.KeyEsc))...)
 			_, err := f.Find(
 				tracks,
 				func(i int) string {
@@ -411,9 +346,7 @@ func BenchmarkFind(b *testing.B) {
 		b.ResetTimer()
 		for i := 0; i < b.N; i++ {
 			f, term := fuzzyfinder.NewWithMockedTerminal()
-			events := append(runes("adrele!!"), key(input{tcell.KeyEsc, rune(tcell.KeyEsc), tcell.ModNone}))
-			term.SetEventsV2(events...)
-
+			term.SetEvents(append(runes("adrele!!"), key(termbox.KeyEsc))...)
 			_, err := f.Find(
 				&tracks,
 				func(i int) string {
@@ -434,33 +367,36 @@ func BenchmarkFind(b *testing.B) {
 	})
 }
 
-func runes(s string) []tcell.Event {
+func runes(s string) []termbox.Event {
 	r := []rune(s)
-	e := make([]tcell.Event, 0, len(r))
+	e := make([]termbox.Event, 0, len(r))
 	for _, r := range r {
 		e = append(e, ch(r))
 	}
 	return e
 }
 
-func ch(r rune) tcell.Event {
-	return key(input{tcell.KeyRune, r, tcell.ModNone})
+func ch(r rune) termbox.Event {
+	if r == ' ' {
+		return key(termbox.KeySpace)
+	}
+	return termbox.Event{
+		Type: termbox.EventKey,
+		Ch:   r,
+	}
 }
 
-func key(input input) tcell.Event {
-	return tcell.NewEventKey(input.key, input.ch, input.mod)
+func key(key termbox.Key) termbox.Event {
+	return termbox.Event{
+		Type: termbox.EventKey,
+		Key:  key,
+	}
 }
 
-func keys(inputs ...input) []tcell.Event {
-	k := make([]tcell.Event, 0, len(inputs))
-	for _, in := range inputs {
-		k = append(k, key(in))
+func keys(keys ...termbox.Key) []termbox.Event {
+	k := make([]termbox.Event, 0, len(keys))
+	for _, _key := range keys {
+		k = append(k, key(_key))
 	}
 	return k
 }
-
-type input struct {
-	key tcell.Key
-	ch  rune
-	mod tcell.ModMask
-}
diff --git a/go.mod b/go.mod
index 423d691..62c94f1 100644
--- a/go.mod
+++ b/go.mod
@@ -2,19 +2,13 @@ module github.com/ktr0731/go-fuzzyfinder
 
 require (
 	github.com/Songmu/gocredits v0.2.0
-	github.com/gdamore/tcell/v2 v2.1.0
 	github.com/golangci/golangci-lint v1.35.2
 	github.com/google/go-cmp v0.5.4
 	github.com/google/gofuzz v1.2.0
-	github.com/goreleaser/goreleaser v0.149.0 // indirect
-	github.com/kisielk/godepgraph v0.0.0-20190626013829-57a7e4a651a9 // indirect
-	github.com/ktr0731/bump v0.1.0 // indirect
-	github.com/matryer/moq v0.1.4 // indirect
+	github.com/goreleaser/goreleaser v0.149.0
 	github.com/mattn/go-runewidth v0.0.10
-	github.com/micmonay/keybd_event v1.1.0
 	github.com/nsf/termbox-go v0.0.0-20201124104050-ed494de23a00
 	github.com/pkg/errors v0.9.1
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 )
 
 go 1.13
diff --git a/go.sum b/go.sum
index 29ce6ef..cf73b94 100644
--- a/go.sum
+++ b/go.sum
@@ -24,14 +24,17 @@ cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNF
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
 cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
 cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0 h1:PQcPefKFdaIzjQFbiyOgAqyx8q5djaE7x9Sqe712DPA=
 cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0 h1:/May9ojXjRkPBNVrq+oWLqmWCkr4OU5uRY29bu0mRyQ=
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
 cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
 cloud.google.com/go/firestore v1.2.0/go.mod h1:iISCjWnTpnoJT1R287xRdjvQHJrxQOpeah4phb5D3h0=
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
 cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
 cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
+cloud.google.com/go/pubsub v1.3.1 h1:ukjixP1wl0LpnZ6LWtZJ0mX5tBmjp1f8Sqer8Z2OMUU=
 cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
 cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
 cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
@@ -74,6 +77,7 @@ github.com/Azure/go-autorest/autorest/date v0.2.0 h1:yW+Zlqf26583pE43KhfnhFcdmSW
 github.com/Azure/go-autorest/autorest/date v0.2.0/go.mod h1:vcORJHLJEh643/Ioh9+vPmf1Ij9AEBM5FuBIXLmIy0g=
 github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
 github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
+github.com/Azure/go-autorest/autorest/mocks v0.3.0 h1:qJumjCaCudz+OcqE9/XtEPfvtOjOmKaui4EOpFI6zZc=
 github.com/Azure/go-autorest/autorest/mocks v0.3.0/go.mod h1:a8FDP3DYzQ4RYfVAxAN3SVSiiO77gL2j2ronKKP0syM=
 github.com/Azure/go-autorest/autorest/to v0.3.0 h1:zebkZaadz7+wIQYgC7GXaz3Wb28yKYfVkkBKwc38VF8=
 github.com/Azure/go-autorest/autorest/to v0.3.0/go.mod h1:MgwOyqaIuKdG4TL/2ywSsIWKAfJfgHDo8ObuUk3t5sA=
@@ -99,6 +103,7 @@ github.com/Masterminds/semver/v3 v3.1.1/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0
 github.com/Masterminds/sprig v2.22.0+incompatible h1:z4yfnGrZ7netVz+0EDJ0Wi+5VZCSYp4Z0m2dk6cEM60=
 github.com/Masterminds/sprig v2.22.0+incompatible/go.mod h1:y6hNFY5UBTIWBxnzTeuNhlNS5hqE0NB0E6fgfo2Br3o=
 github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
+github.com/Microsoft/go-winio v0.4.15 h1:qkLXKzb1QoVatRyd/YlXZ/Kg0m5K3SPuoD82jjSOaBc=
 github.com/Microsoft/go-winio v0.4.15/go.mod h1:tTuCMEN+UleMWgg9dVx4Hu52b1bJo+59jBh3ajtinzw=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/OpenPeeDeeP/depguard v1.0.1 h1:VlW4R6jmBIv3/u1JNlawEvJMM4J+dPORPaZasQee8Us=
@@ -106,6 +111,7 @@ github.com/OpenPeeDeeP/depguard v1.0.1/go.mod h1:xsIw86fROiiwelg+jB2uM9PiKihMMmU
 github.com/Songmu/gocredits v0.2.0 h1:AbvFKEbwP5/0qisF0cTlUwVuCtzbJG+ynsXuEUC98vI=
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 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
+github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7 h1:uSoVVbwJiQipAclBbw+8quDsfcvFjOpI5iCf4p/cqCs=
 github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7/go.mod h1:6zEj6s6u/ghQa61ZWa/C2Aw3RkjiTBOix7dkqa1VLIs=
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@@ -113,6 +119,7 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuy
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
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 github.com/andybalholm/brotli v1.0.0/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
+github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 h1:kFOfPq6dUM1hTo4JG6LR5AXSUEsOjtdm0kw0FtQtMJA=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
 github.com/apex/log v1.9.0 h1:FHtw/xuaM8AgmvDDTI9fiwoAL25Sq2cxojnZICUU8l0=
 github.com/apex/log v1.9.0/go.mod h1:m82fZlWIuiWzWP04XCTXmnX0xRkYYbCdYn8jbJeLBEA=
@@ -122,8 +129,11 @@ github.com/aphistic/sweet v0.2.0/go.mod h1:fWDlIh/isSE9n6EPsRmC0det+whmX6dJid3st
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
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+github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
+github.com/ashanbrown/forbidigo v1.0.0 h1:QdNXBduDUopc3GW+YVYZn8jzmIMklQiCfdN2N5+dQeE=
 github.com/ashanbrown/forbidigo v1.0.0/go.mod h1:PH+zMRWE15yW69fYfe7Kn8nYR6yYyafc3ntEGh2BBAg=
+github.com/ashanbrown/makezero v0.0.0-20201205152432-7b7cdbb3025a h1:/U9tbJzDRof4fOR51vwzWdIBsIH6R2yU0KG1MBRM2Js=
 github.com/ashanbrown/makezero v0.0.0-20201205152432-7b7cdbb3025a/go.mod h1:oG9Dnez7/ESBqc4EdrdNlryeo7d0KcW1ftXHm7nU/UU=
 github.com/aws/aws-sdk-go v1.15.27/go.mod h1:mFuSZ37Z9YOHbQEwBWztmVzqXrEkub65tZoCYDt7FT0=
 github.com/aws/aws-sdk-go v1.19.18/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
@@ -151,6 +161,7 @@ github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghf
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
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 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/client9/misspell v0.3.4 h1:ta993UF76GwbvJcIo3Y68y/M3WxlpEHPWIGDkJYwzJI=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
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 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
@@ -160,15 +171,14 @@ github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
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 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/daixiang0/gci v0.2.4 h1:BUCKk5nlK2m+kRIsoj+wb/5hazHvHeZieBKWd9Afa8Q=
 github.com/daixiang0/gci v0.2.4/go.mod h1:+AV8KmHTGxxwp/pY84TLQfFKp2vuKXXJVzF3kD/hfR4=
-github.com/daixiang0/gci v0.2.7/go.mod h1:+4dZ7TISfSmqfAGv59ePaHfNzgGtIkHAhhdKggP1JAc=
+github.com/daixiang0/gci v0.2.8 h1:1mrIGMBQsBu0P7j7m1M8Lb+ZeZxsZL+jyGX4YoMJJpg=
 github.com/daixiang0/gci v0.2.8/go.mod h1:+4dZ7TISfSmqfAGv59ePaHfNzgGtIkHAhhdKggP1JAc=
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-github.com/denis-tingajkin/go-header v0.3.1 h1:ymEpSiFjeItCy1FOP+x0M2KdCELdEAHUsNa8F+hHc6w=
 github.com/denis-tingajkin/go-header v0.3.1/go.mod h1:sq/2IxMhaZX+RRcgHfCRx/m0M5na0fBt4/CRe7Lrji0=
+github.com/denis-tingajkin/go-header v0.4.2 h1:jEeSF4sdv8/3cT/WY8AgDHUoItNSoEZ7qg9dX7pc218=
 github.com/denis-tingajkin/go-header v0.4.2/go.mod h1:eLRHAVXzE5atsKAnNRDB90WHCFFnBUn4RN0nRcs1LJA=
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@@ -186,25 +196,23 @@ github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5Kwzbycv
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+github.com/go-git/go-git-fixtures/v4 v4.0.2-0.20200613231340-f56387b50c12 h1:PbKy9zOy4aAKrJ5pibIRpVO2BXnK1Tlcg+caKI7Ox5M=
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@@ -230,6 +238,7 @@ github.com/go-toolsmith/astfmt v1.0.0/go.mod h1:cnWmsOAuq4jJY6Ct5YWlVLmcmLMn1JUP
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@@ -282,11 +291,8 @@ github.com/golangci/gocyclo v0.0.0-20180528144436-0a533e8fa43d h1:pXTK/gkVNs7Zyy
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-github.com/golangci/golangci-lint v1.33.0 h1:/o4OtOR3Idim4FHKBJXcy+6ZjNDm82gwK/v6+gWyH9U=
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@@ -311,18 +317,20 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -347,6 +355,7 @@ github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+
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@@ -359,11 +368,11 @@ github.com/goreleaser/nfpm v1.10.2/go.mod h1:R3sQteLUCtPD7GJxvDl0eqlkTX0/hqFftT3
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@@ -373,6 +382,7 @@ github.com/hashicorp/consul/sdk v0.1.1/go.mod h1:VKf9jXwCTEY1QZP2MOLRhb5i/I/ssyN
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@@ -384,8 +394,6 @@ github.com/hashicorp/go-sockaddr v1.0.0/go.mod h1:7Xibr9yA9JjQq1JpNB2Vw7kxv8xerX
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@@ -405,7 +413,9 @@ github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:
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@@ -427,15 +437,15 @@ github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22
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@@ -466,9 +469,6 @@ github.com/kyoh86/exportloopref v0.1.8/go.mod h1:1tUcJeiioIs7VWe5gcOObrux3lb66+s
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@@ -476,8 +476,6 @@ github.com/maratori/testpackage v1.0.1 h1:QtJ5ZjqapShm0w5DosRjg0PRlSdAdlx+W6cCKo
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 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.2.0 h1:Hbg2NidpLE8veEBkEZTL3CvlkUIVzuU9jDplZO54c48=
 github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
@@ -672,12 +668,13 @@ github.com/subosito/gotenv v1.2.0 h1:Slr1R9HxAlEKefgq5jn9U+DnETlIUa6HfgEzj0g5d7s
 github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
 github.com/tdakkota/asciicheck v0.0.0-20200416190851-d7f85be797a2 h1:Xr9gkxfOP0KQWXKNqmwe8vEeSUiUj4Rlee9CMVX2ZUQ=
 github.com/tdakkota/asciicheck v0.0.0-20200416190851-d7f85be797a2/go.mod h1:yHp0ai0Z9gUljN3o0xMhYJnH/IcvkdTBOX2fmJ93JEM=
-github.com/tetafro/godot v1.3.0 h1:rKXb6aAz2AnwS98jYlU3snCFFXnIInQdaGiftNwpj+k=
 github.com/tetafro/godot v1.3.0/go.mod h1:/7NLHhv08H1+8DNj0MElpAACw1ajsCuf3TKNQxA5S+0=
+github.com/tetafro/godot v1.3.2 h1:HzWC3XjadkyeuBZxkfAFNY20UVvle0YD51I6zf6RKlU=
 github.com/tetafro/godot v1.3.2/go.mod h1:ah7jjYmOMnIjS9ku2krapvGQrFNtTLo9Z/qB3dGU1eU=
 github.com/timakin/bodyclose v0.0.0-20190930140734-f7f2e9bca95e h1:RumXZ56IrCj4CL+g1b9OL/oH0QnsF976bC8xQFYUD5Q=
 github.com/timakin/bodyclose v0.0.0-20190930140734-f7f2e9bca95e/go.mod h1:Qimiffbc6q9tBWlVV6x0P9sat/ao1xEkREYPPj9hphk=
 github.com/tj/assert v0.0.0-20171129193455-018094318fb0/go.mod h1:mZ9/Rh9oLWpLLDRpvE+3b7gP/C2YyLFYxNmcLnPTMe0=
+github.com/tj/assert v0.0.3 h1:Df/BlaZ20mq6kuai7f5z2TvPFiwC3xaWJSDQNiIS3Rk=
 github.com/tj/assert v0.0.3/go.mod h1:Ne6X72Q+TB1AteidzQncjw9PabbMp4PBMZ1k+vd1Pvk=
 github.com/tj/go-buffer v1.1.0/go.mod h1:iyiJpfFcR2B9sXu7KvjbT9fpM4mOelRSDTbntVj52Uc=
 github.com/tj/go-elastic v0.0.0-20171221160941-36157cbbebc2/go.mod h1:WjeM0Oo1eNAjXGDx2yma7uG2XoyRZTq1uv3M/o7imD0=
@@ -686,8 +683,8 @@ github.com/tj/go-spin v1.1.0/go.mod h1:Mg1mzmePZm4dva8Qz60H2lHwmJ2loum4VIrLgVnKw
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/tomarrell/wrapcheck v0.0.0-20200807122107-df9e8bcb914d h1:3EZyvNUMsGD1QA8cu0STNn1L7I77rvhf2IhOcHYQhSw=
 github.com/tomarrell/wrapcheck v0.0.0-20200807122107-df9e8bcb914d/go.mod h1:yiFB6fFoV7saXirUGfuK+cPtUh4NX/Hf5y2WC2lehu0=
-github.com/tommy-muehle/go-mnd v1.3.1-0.20200224220436-e6f9a994e8fa h1:RC4maTWLKKwb7p1cnoygsbKIgNlJqSYBeAFON3Ar8As=
 github.com/tommy-muehle/go-mnd v1.3.1-0.20200224220436-e6f9a994e8fa/go.mod h1:dSUh0FtTP8VhvkL1S+gUR1OKd9ZnSaozuI6r3m6wOig=
+github.com/tommy-muehle/go-mnd v1.3.1-0.20201008215730-16041ac3fe65 h1:Y0bLA422kvb32uZI4fy/Plop/Tbld0l9pSzl+j1FWok=
 github.com/tommy-muehle/go-mnd v1.3.1-0.20201008215730-16041ac3fe65/go.mod h1:T22e7iRN4LsFPZGyRLRXeF+DWVXFuV9thsyO7NjbbTI=
 github.com/ulikunitz/xz v0.5.7/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
 github.com/ulikunitz/xz v0.5.8 h1:ERv8V6GKqVi23rgu5cj9pVfVzJbOqAY2Ntl88O6c2nQ=
@@ -707,6 +704,7 @@ github.com/xanzy/go-gitlab v0.39.0/go.mod h1:sPLojNBn68fMUWSxIJtdVVIP8uSBYqesTfD
 github.com/xanzy/ssh-agent v0.2.1/go.mod h1:mLlQY/MoOhWBj+gOGMQkOeiEvkx+8pJSI+0Bx9h2kr4=
 github.com/xanzy/ssh-agent v0.3.0 h1:wUMzuKtKilRgBAD1sUb8gOwwRr2FGoBVumcjoOACClI=
 github.com/xanzy/ssh-agent v0.3.0/go.mod h1:3s9xbODqPuuhK9JV1R321M/FlMZSBvE5aY6eAcqrDh0=
+github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 h1:nIPpBwaJSVYIxUFsDv3M8ofmx9yWTog9BfvIu0q41lo=
 github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8/go.mod h1:HUYIGzjTL3rfEspMxjDjgmT5uz5wzYJKVo23qUhYTos=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
@@ -721,7 +719,6 @@ go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
-go.uber.org/goleak v0.10.0/go.mod h1:VCZuO8V8mFPlL0F5J5GK1rtHV3DrFcQ1R8ryq7FK0aI=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
 gocloud.dev v0.20.0 h1:mbEKMfnyPV7W1Rj35R1xXfjszs9dXkwSOq2KoFr25g8=
@@ -761,6 +758,7 @@ golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHl
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
 golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
+golang.org/x/lint v0.0.0-20200302205851-738671d3881b h1:Wh+f8QHJXR411sJR8/vRBTZ7YapZaRvUcLFFJhusH0k=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
@@ -769,8 +767,8 @@ golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.0 h1:8pl+sMODzuvGJkmj2W4kZihvVb5mKm8pB/X44PIQHv8=
 golang.org/x/mod v0.4.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -825,8 +823,8 @@ golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 h1:qwRHBd0NqMbJxfbotnDhm2ByMI1Shq4Y6oRJo21SGJA=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -835,7 +833,6 @@ golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20181026203630-95b1ffbd15a5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181116161606-93218def8b18/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190221075227-b4e8571b14e0/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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@@ -846,8 +843,6 @@ golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756 h1:9nuHUbU8dRnRRfj9KjWUVrJeoexdbeMjttk6Oh1rD10=
-golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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@@ -874,18 +869,14 @@ golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200602225109-6fdc65e7d980/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f h1:+Nyd8tzPX9R7BWHguqsrbFdRx3WQ/1ib8I44HXV5yTA=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20201009025420-dfb3f7c4e634 h1:bNEHhJCnrwMKNMmOx3yAynp5vs5/gRy+XWFtZFu7NBM=
 golang.org/x/sys v0.0.0-20201009025420-dfb3f7c4e634/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
-golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
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 golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
@@ -961,25 +952,22 @@ golang.org/x/tools v0.0.0-20200625211823-6506e20df31f/go.mod h1:EkVYQZoAsY45+roY
 golang.org/x/tools v0.0.0-20200724022722-7017fd6b1305/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200731060945-b5fad4ed8dd6/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
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-golang.org/x/tools v0.0.0-20200815165600-90abf76919f3/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
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 golang.org/x/tools v0.0.0-20201007032633-0806396f153e/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
 golang.org/x/tools v0.0.0-20201011145850-ed2f50202694/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201013201025-64a9e34f3752 h1:2ntEwh02rqo2jSsrYmp4yKHHjh0CbXP3ZtSUetSB+q8=
 golang.org/x/tools v0.0.0-20201013201025-64a9e34f3752/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
 golang.org/x/tools v0.0.0-20201030010431-2feb2bb1ff51/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20201114224030-61ea331ec02b/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20201118003311-bd56c0adb394/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.0.0-20201121010211-780cb80bd7fb/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20201230224404-63754364767c/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210101214203-2dba1e4ea05c/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/tools v0.0.0-20210105210202-9ed45478a130 h1:8qSBr5nyKsEgkP918Pu5FFDZpTtLIjXSo6mrtdVOFfk=
 golang.org/x/tools v0.0.0-20210105210202-9ed45478a130/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -1005,6 +993,7 @@ google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
+google.golang.org/appengine v1.6.6 h1:lMO5rYAqUxkmaj76jAkRUvt5JZgFymx/+Q5Mzfivuhc=
 google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
@@ -1056,7 +1045,6 @@ google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQ
 google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.24.0 h1:UhZDfRO8JRQru4/+LlLE0BRKGF8L+PICnvYZmx/fEGA=
@@ -1065,14 +1053,15 @@ gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLks
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.62.0 h1:duBzk771uxoUuOlyRLkHsygud9+5lrlGjdFBb4mSKDU=
 gopkg.in/ini.v1 v1.62.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/warnings.v0 v0.1.2 h1:wFXVbFY8DY5/xOe1ECiWdKCzZlxgshcYVNkBHstARME=
 gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
@@ -1081,11 +1070,9 @@ gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c h1:grhR+C34yXImVGp7EzNk+DTIk+323eIUWOmEevy6bDo=
 gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
@@ -1098,9 +1085,8 @@ honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 honnef.co/go/tools v0.0.1-2020.1.6 h1:W18jzjh8mfPez+AwGLxmOImucz/IFjpNlrKVnaj2YVc=
 honnef.co/go/tools v0.0.1-2020.1.6/go.mod h1:pyyisuGw24ruLjrr1ddx39WE0y9OooInRzEYLhQB2YY=
-mvdan.cc/gofumpt v0.0.0-20200802201014-ab5a8192947d h1:t8TAw9WgTLghti7RYkpPmqk4JtQ3+wcP5GgZqgWeWLQ=
 mvdan.cc/gofumpt v0.0.0-20200802201014-ab5a8192947d/go.mod h1:bzrjFmaD6+xqohD3KYP0H2FEuxknnBmyyOxdhLdaIws=
-mvdan.cc/gofumpt v0.0.0-20201129102820-5c11c50e9475/go.mod h1:E4LOcu9JQEtnYXtB1Y51drqh2Qr2Ngk9J3YrRCwcbd0=
+mvdan.cc/gofumpt v0.1.0 h1:hsVv+Y9UsZ/mFZTxJZuHVI6shSQCtzZ11h1JEFPAZLw=
 mvdan.cc/gofumpt v0.1.0/go.mod h1:yXG1r1WqZVKWbVRtBWKWX9+CxGYfA51nSomhM0woR48=
 mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed h1:WX1yoOaKQfddO/mLzdV4wptyWgoH/6hwLs7QHTixo0I=
 mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed/go.mod h1:Xkxe497xwlCKkIaQYRfC7CSLworTXY9RMqwhhCm+8Nc=
diff --git a/helper_test.go b/helper_test.go
index 9f65cb5..82563f4 100644
--- a/helper_test.go
+++ b/helper_test.go
@@ -1,13 +1,16 @@
 package fuzzyfinder
 
+import "time"
+
 func New() *finder {
 	return &finder{}
 }
 
 func NewWithMockedTerminal() (*finder, *TerminalMock) {
 	f := New()
-	m := f.UseMockedTerminalV2()
+	m := f.UseMockedTerminal()
 	w, h := 60, 10 // A normally value.
 	m.SetSize(w, h)
+	m.sleepDuration = 500 * time.Microsecond
 	return f, m
 }
diff --git a/mock.go b/mock.go
index 0c994aa..15ce304 100644
--- a/mock.go
+++ b/mock.go
@@ -6,7 +6,6 @@ import (
 	"sync"
 	"time"
 
-	"github.com/gdamore/tcell/v2"
 	runewidth "github.com/mattn/go-runewidth"
 	"github.com/nsf/termbox-go"
 )
@@ -16,12 +15,9 @@ type cell struct {
 	bg, fg termbox.Attribute
 }
 
-type simScreen tcell.SimulationScreen
-
 // TerminalMock is a mocked terminal for testing.
 // Most users should use it by calling UseMockedTerminal.
 type TerminalMock struct {
-	simScreen
 	sizeMu        sync.RWMutex
 	width, height int
 
@@ -35,16 +31,11 @@ type TerminalMock struct {
 	result   string
 
 	sleepDuration time.Duration
-	v2            bool
 }
 
 // SetSize changes the pseudo-size of the window.
 // Note that SetSize resets added cells.
 func (m *TerminalMock) SetSize(w, h int) {
-	if m.v2 {
-		m.simScreen.SetSize(w, h)
-		return
-	}
 	m.sizeMu.Lock()
 	defer m.sizeMu.Unlock()
 	m.cellsMu.Lock()
@@ -54,94 +45,20 @@ func (m *TerminalMock) SetSize(w, h int) {
 	m.cells = make([]*cell, w*h)
 }
 
-// Deprecated: Use SetEventsV2
 // SetEvents sets all events, which are fetched by pollEvent.
 // A user of this must set the EscKey event at the end.
-func (m *TerminalMock) SetEvents(events ...termbox.Event) {
+func (m *TerminalMock) SetEvents(e ...termbox.Event) {
 	m.eventsMu.Lock()
 	defer m.eventsMu.Unlock()
-	m.events = events
-}
-
-// SetEventsV2 sets all events, which are fetched by pollEvent.
-// A user of this must set the EscKey event at the end.
-func (m *TerminalMock) SetEventsV2(events ...tcell.Event) {
-	for _, event := range events {
-		switch event := event.(type) {
-		case *tcell.EventKey:
-			ek := event
-			m.simScreen.InjectKey(ek.Key(), ek.Rune(), ek.Modifiers())
-		case *tcell.EventResize:
-			er := event
-			w, h := er.Size()
-			m.simScreen.SetSize(w, h)
-		}
-	}
+	m.events = e
 }
 
 // GetResult returns a flushed string that is displayed to the actual terminal.
 // It contains all escape sequences such that ANSI escape code.
 func (m *TerminalMock) GetResult() string {
-	if !m.v2 {
-		m.resultMu.RLock()
-		defer m.resultMu.RUnlock()
-		return m.result
-	}
-
-	var s string
-
-	// set cursor for snapshot test
-	setCursor := func() {
-		cursorX, cursorY, _ := m.simScreen.GetCursor()
-		mainc, _, _, _ := m.simScreen.GetContent(cursorX, cursorY)
-		if mainc == ' ' {
-			m.simScreen.SetContent(cursorX, cursorY, '\u2588', nil, tcell.StyleDefault.Foreground(tcell.ColorWhite).Background(tcell.ColorDefault))
-		} else {
-			m.simScreen.SetContent(cursorX, cursorY, mainc, nil, tcell.StyleDefault.Background(tcell.ColorWhite))
-		}
-		m.simScreen.Show()
-	}
-
-	setCursor()
-
-	m.resultMu.Lock()
-
-	cells, width, height := m.simScreen.GetContents()
-
-	for h := 0; h < height; h++ {
-		prevFg, prevBg := tcell.ColorDefault, tcell.ColorDefault
-		for w := 0; w < width; w++ {
-			cell := cells[h*width+w]
-			fg, bg, attr := cell.Style.Decompose()
-			var fgReset bool
-			if fg != prevFg {
-				s += "\x1b\x5b\x6d" // Reset previous color.
-				s += parseAttrV2(&fg, nil, attr)
-				prevFg = fg
-				prevBg = tcell.ColorDefault
-				fgReset = true
-			}
-			if bg != prevBg {
-				if !fgReset {
-					s += "\x1b\x5b\x6d" // Reset previous color.
-					prevFg = tcell.ColorDefault
-				}
-				s += parseAttrV2(nil, &bg, attr)
-				prevBg = bg
-			}
-			s += string(cell.Runes)
-			rw := runewidth.RuneWidth(cell.Runes[0])
-			if rw != 0 {
-				w += rw - 1
-			}
-		}
-		s += "\n"
-	}
-	s += "\x1b\x5b\x6d" // Reset previous color.
-
-	m.resultMu.Unlock()
-
-	return s
+	m.resultMu.RLock()
+	defer m.resultMu.RUnlock()
+	return m.result
 }
 
 func (m *TerminalMock) init() error {
@@ -208,7 +125,7 @@ func (m *TerminalMock) pollEvent() termbox.Event {
 }
 
 // flush displays all items with formatted layout.
-func (m *TerminalMock) flush() {
+func (m *TerminalMock) flush() error {
 	m.cellsMu.RLock()
 
 	var s string
@@ -257,6 +174,8 @@ func (m *TerminalMock) flush() {
 	defer m.resultMu.Unlock()
 
 	m.result = s
+
+	return nil
 }
 
 func (m *TerminalMock) close() {}
@@ -267,31 +186,12 @@ func UseMockedTerminal() *TerminalMock {
 	return defaultFinder.UseMockedTerminal()
 }
 
-// UseMockedTerminalV2 switches the terminal, which is used from
-// this package to a mocked one.
-func UseMockedTerminalV2() *TerminalMock {
-	return defaultFinder.UseMockedTerminalV2()
-}
-
 func (f *finder) UseMockedTerminal() *TerminalMock {
 	m := &TerminalMock{}
 	f.term = m
 	return m
 }
 
-func (f *finder) UseMockedTerminalV2() *TerminalMock {
-	screen := tcell.NewSimulationScreen("UTF-8")
-	if err := screen.Init(); err != nil {
-		panic(err)
-	}
-	m := &TerminalMock{
-		simScreen: screen,
-		v2:        true,
-	}
-	f.term = m
-	return m
-}
-
 // parseAttr parses an attribute of termbox
 // as an escape sequence.
 // parseAttr doesn't support output modes othar than color256 in termbox-go.
@@ -333,61 +233,3 @@ func parseAttr(attr termbox.Attribute, isFg bool) string {
 
 	return buf.String()
 }
-
-// parseAttrV2 parses color and attribute for testing.
-func parseAttrV2(fg, bg *tcell.Color, attr tcell.AttrMask) string {
-	if attr == tcell.AttrInvalid {
-		panic("invalid attribute")
-	}
-
-	var buf bytes.Buffer
-
-	buf.WriteString("\x1b[")
-	parseAttrMask := func() {
-		if attr >= tcell.AttrUnderline {
-			buf.WriteString("4;")
-			attr -= tcell.AttrUnderline
-		}
-		if attr >= tcell.AttrReverse {
-			buf.WriteString("7;")
-			attr -= tcell.AttrReverse
-		}
-		if attr >= tcell.AttrBold {
-			buf.WriteString("1;")
-			attr -= tcell.AttrBold
-		}
-	}
-
-	if fg != nil || bg != nil {
-		isFg := fg != nil && bg == nil
-
-		if isFg {
-			parseAttrMask()
-			if *fg == tcell.ColorDefault {
-				buf.WriteString("39")
-			} else {
-				fmt.Fprintf(&buf, "38;5;%d", toAnsi3bit(*fg))
-			}
-		} else {
-			if *bg == tcell.ColorDefault {
-				buf.WriteString("49")
-			} else {
-				fmt.Fprintf(&buf, "48;5;%d", toAnsi3bit(*bg))
-			}
-		}
-		buf.WriteString("m")
-	}
-	return buf.String()
-}
-
-func toAnsi3bit(color tcell.Color) int {
-	colors := []tcell.Color{
-		tcell.ColorBlack, tcell.ColorRed, tcell.ColorGreen, tcell.ColorYellow, tcell.ColorBlue, tcell.ColorDarkMagenta, tcell.ColorDarkCyan, tcell.ColorWhite,
-	}
-	for i, c := range colors {
-		if c == color {
-			return i
-		}
-	}
-	return 0
-}
diff --git a/mock_test.go b/mock_test.go
index 9978120..2332bc1 100644
--- a/mock_test.go
+++ b/mock_test.go
@@ -3,7 +3,6 @@ package fuzzyfinder
 import (
 	"testing"
 
-	"github.com/gdamore/tcell/v2"
 	"github.com/google/go-cmp/cmp"
 	"github.com/nsf/termbox-go"
 )
@@ -63,69 +62,3 @@ func Test_parseAttr(t *testing.T) {
 		})
 	}
 }
-
-func Test_parseAttrV2(t *testing.T) {
-	cases := map[string]struct {
-		attr      tcell.AttrMask
-		fg        tcell.Color
-		bg        tcell.Color
-		isBg      bool
-		expected  string
-		willPanic bool
-	}{
-		"ColorDefault": {
-			fg:       tcell.ColorDefault,
-			expected: "\x1b[39m",
-		},
-		"ColorDefault bg": {
-			bg:       tcell.ColorDefault,
-			isBg:     true,
-			expected: "\x1b[49m",
-		},
-		"ColorGreen": {
-			fg:       tcell.ColorGreen,
-			expected: "\x1b[38;5;2m",
-		},
-		"ColorGreen with bold": {
-			attr:     tcell.AttrBold,
-			fg:       tcell.ColorGreen,
-			expected: "\x1b[1;38;5;2m",
-		},
-		"ColorGreen with bold and underline": {
-			attr:     tcell.AttrBold | tcell.AttrUnderline,
-			fg:       tcell.ColorGreen,
-			expected: "\x1b[4;1;38;5;2m",
-		},
-		"ColorGreen with reverse": {
-			attr:     tcell.AttrReverse,
-			fg:       tcell.ColorGreen,
-			expected: "\x1b[7;38;5;2m",
-		},
-		"invalid color": {
-			attr:      tcell.AttrInvalid,
-			willPanic: true,
-		},
-	}
-
-	for name, c := range cases {
-		c := c
-		t.Run(name, func(t *testing.T) {
-			if c.willPanic {
-				defer func() {
-					if err := recover(); err == nil {
-						t.Errorf("must panic")
-					}
-				}()
-			}
-			var actual string
-			if c.isBg {
-				actual = parseAttrV2(nil, &c.bg, c.attr)
-			} else {
-				actual = parseAttrV2(&c.fg, nil, c.attr)
-			}
-			if diff := cmp.Diff(c.expected, actual); diff != "" {
-				t.Errorf("diff found: \n%s\nexpected = %x, actual = %x", diff, c.expected, actual)
-			}
-		})
-	}
-}
diff --git a/tcell.go b/tcell.go
index 7c431c6..5c08221 100644
--- a/tcell.go
+++ b/tcell.go
@@ -1,15 +1,52 @@
 package fuzzyfinder
 
 import (
-	"github.com/gdamore/tcell/v2"
+	"github.com/nsf/termbox-go"
 )
 
-type screen tcell.Screen
-
+// terminal is an abstraction for mocking termbox-go.
 type terminal interface {
-	screen
+	init() error
+	size() (width int, height int)
+	clear(termbox.Attribute, termbox.Attribute) error
+	setCell(x, y int, ch rune, fg, bg termbox.Attribute)
+	setCursor(x, y int)
+	pollEvent() termbox.Event
+	flush() error
+	close()
+}
+
+// termImpl is the implementation for termbox-go.
+type termImpl struct{}
+
+func (t *termImpl) init() error {
+	return termbox.Init()
+}
+
+func (t *termImpl) size() (width int, height int) {
+	return termbox.Size()
+}
+
+func (t *termImpl) clear(fg termbox.Attribute, bg termbox.Attribute) error {
+	return termbox.Clear(fg, bg)
+}
+
+func (t *termImpl) setCell(x int, y int, ch rune, fg termbox.Attribute, bg termbox.Attribute) {
+	termbox.SetCell(x, y, ch, fg, bg)
+}
+
+func (t *termImpl) setCursor(x int, y int) {
+	termbox.SetCursor(x, y)
+}
+
+func (t *termImpl) pollEvent() termbox.Event {
+	return termbox.PollEvent()
+}
+
+func (t *termImpl) flush() error {
+	return termbox.Flush()
 }
 
-type termImpl struct {
-	screen
+func (t *termImpl) close() {
+	termbox.Close()
 }
diff --git a/testdata/fixtures/testfind-arrow_left-right.golden b/testdata/fixtures/testfind-arrow_left-right.golden
index e67a53d..331a64f 100644
--- a/testdata/fixtures/testfind-arrow_left-right.golden
+++ b/testdata/fixtures/testfind-arrow_left-right.golden
@@ -6,6 +6,6 @@
                               │                            │
                               │                            │
                               │                            │
-  0/9                         │                            │
-> ゆるふわ樹海                └────────────────────────────┘
+  0/9                         │                            │
+> ゆるふわ樹海ガール          └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-arrow_left_backspace.golden b/testdata/fixtures/testfind-arrow_left_backspace.golden
deleted file mode 100644
index de9617e..0000000
--- a/testdata/fixtures/testfind-arrow_left_backspace.golden
+++ /dev/null
@@ -1,11 +0,0 @@
-                              ┌────────────────────────────┐
-                              │ not found                  │
-                              │                            │
-                              │                            │
-                              │                            │
-                              │                            │
-                              │                            │
-                              │                            │
-  0/9                         │                            │
-> オレジ                      └────────────────────────────┘
-
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-arrow_up-down.golden b/testdata/fixtures/testfind-arrow_up-down.golden
index 0c9b9a6..965ef8b 100644
--- a/testdata/fixtures/testfind-arrow_up-down.golden
+++ b/testdata/fixtures/testfind-arrow_up-down.golden
@@ -4,8 +4,8 @@
   closing                     │                            │
   ソラニン                    │                            │
   adrenaline!!!               │                            │
-> ヒトリノ夜                  │                            │
+> ヒトリノ夜                  │                            │
   あの日自分が出て行ってや..  │                            │
-  9/9                         │                            │
-> █                           └────────────────────────────┘
+  9/9                         │                            │
+> █                           └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-backspace.golden b/testdata/fixtures/testfind-backspace.golden
index 2fad9ba..6962f71 100644
--- a/testdata/fixtures/testfind-backspace.golden
+++ b/testdata/fixtures/testfind-backspace.golden
@@ -6,6 +6,6 @@
                               │                            │
                               │                            │
                               │                            │
-  0/9                         │                            │
-> adr █                       └────────────────────────────┘
+  0/9                         │                            │
+> adrenaline!!! -TV er        └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-backspace2.golden b/testdata/fixtures/testfind-backspace2.golden
index 8ed188b..1adfcbc 100644
--- a/testdata/fixtures/testfind-backspace2.golden
+++ b/testdata/fixtures/testfind-backspace2.golden
@@ -6,6 +6,6 @@
                               │                            │
                               │                            │
                               │                            │
-  0/9                         │                            │
-> オレ█                       └────────────────────────────┘
+  0/9                         │                            │
+> オレ█                       └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-backspace_doesnt_change_x_if_cursorx_is_0.golden b/testdata/fixtures/testfind-backspace_doesnt_change_x_if_cursorx_is_0.golden
index a3a49af..ac08c85 100644
--- a/testdata/fixtures/testfind-backspace_doesnt_change_x_if_cursorx_is_0.golden
+++ b/testdata/fixtures/testfind-backspace_doesnt_change_x_if_cursorx_is_0.golden
@@ -5,7 +5,7 @@
                               │                            │
                               │                            │
   Catch the Moment            │                            │
-> adrenaline!!!               │                            │
-  2/9                         │                            │
-> a█                          └────────────────────────────┘
+> adrenaline!!!               │                            │
+  2/9                         │                            │
+> a█                          └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-backspace_empty.golden b/testdata/fixtures/testfind-backspace_empty.golden
index f386d2d..3548920 100644
--- a/testdata/fixtures/testfind-backspace_empty.golden
+++ b/testdata/fixtures/testfind-backspace_empty.golden
@@ -5,7 +5,7 @@
   ソラニン                    │                            │
   adrenaline!!!               │                            │
   ヒトリノ夜                  │                            │
-> あの日自分が出て行ってや..  │                            │
-  9/9                         │                            │
-> █                           └────────────────────────────┘
+> あの日自分が出て行ってや..  │                            │
+  9/9                         │                            │
+> █                           └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-ctrl-e.golden b/testdata/fixtures/testfind-ctrl-e.golden
index 32d933b..f07e550 100644
--- a/testdata/fixtures/testfind-ctrl-e.golden
+++ b/testdata/fixtures/testfind-ctrl-e.golden
@@ -6,6 +6,6 @@
                               │                            │
                               │                            │
                               │                            │
-  0/9                         │                            │
-> 恋をしたのは█               └────────────────────────────┘
+  0/9                         │                            │
+> 恋をしたのは█               └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-ctrl-u.golden b/testdata/fixtures/testfind-ctrl-u.golden
index 4187243..4b90bab 100644
--- a/testdata/fixtures/testfind-ctrl-u.golden
+++ b/testdata/fixtures/testfind-ctrl-u.golden
@@ -6,6 +6,6 @@
                               │                            │
                               │                            │
                               │                            │
-  0/9                         │                            │
-> は█                         └────────────────────────────┘
+  0/9                         │                            │
+> は█                         └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-ctrl-w.golden b/testdata/fixtures/testfind-ctrl-w.golden
index 467692b..bbd9d93 100644
--- a/testdata/fixtures/testfind-ctrl-w.golden
+++ b/testdata/fixtures/testfind-ctrl-w.golden
@@ -6,6 +6,6 @@
                               │                            │
                               │                            │
                               │                            │
-  0/9                         │                            │
-> ハロ / █                    └────────────────────────────┘
+  0/9                         │                            │
+> ハロ / █                    └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-ctrl-w_empty.golden b/testdata/fixtures/testfind-ctrl-w_emtpy.golden
similarity index 67%
rename from testdata/fixtures/testfind-ctrl-w_empty.golden
rename to testdata/fixtures/testfind-ctrl-w_emtpy.golden
index f386d2d..3548920 100644
--- a/testdata/fixtures/testfind-ctrl-w_empty.golden
+++ b/testdata/fixtures/testfind-ctrl-w_emtpy.golden
@@ -5,7 +5,7 @@
   ソラニン                    │                            │
   adrenaline!!!               │                            │
   ヒトリノ夜                  │                            │
-> あの日自分が出て行ってや..  │                            │
-  9/9                         │                            │
-> █                           └────────────────────────────┘
+> あの日自分が出て行ってや..  │                            │
+  9/9                         │                            │
+> █                           └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-delete.golden b/testdata/fixtures/testfind-delete.golden
index 81c3d08..cc46143 100644
--- a/testdata/fixtures/testfind-delete.golden
+++ b/testdata/fixtures/testfind-delete.golden
@@ -6,6 +6,6 @@
                               │                            │
                               │                            │
                               │                            │
-  0/9                         │                            │
-> レンジ                      └────────────────────────────┘
+  0/9                         │                            │
+> レンジ                      └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-delete_empty.golden b/testdata/fixtures/testfind-delete_empty.golden
index f386d2d..3548920 100644
--- a/testdata/fixtures/testfind-delete_empty.golden
+++ b/testdata/fixtures/testfind-delete_empty.golden
@@ -5,7 +5,7 @@
   ソラニン                    │                            │
   adrenaline!!!               │                            │
   ヒトリノ夜                  │                            │
-> あの日自分が出て行ってや..  │                            │
-  9/9                         │                            │
-> █                           └────────────────────────────┘
+> あの日自分が出て行ってや..  │                            │
+  9/9                         │                            │
+> █                           └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-initial.golden b/testdata/fixtures/testfind-initial.golden
index f386d2d..3548920 100644
--- a/testdata/fixtures/testfind-initial.golden
+++ b/testdata/fixtures/testfind-initial.golden
@@ -5,7 +5,7 @@
   ソラニン                    │                            │
   adrenaline!!!               │                            │
   ヒトリノ夜                  │                            │
-> あの日自分が出て行ってや..  │                            │
-  9/9                         │                            │
-> █                           └────────────────────────────┘
+> あの日自分が出て行ってや..  │                            │
+  9/9                         │                            │
+> █                           └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-input_glow.golden b/testdata/fixtures/testfind-input_glow.golden
index 7f08c5b..643ac03 100644
--- a/testdata/fixtures/testfind-input_glow.golden
+++ b/testdata/fixtures/testfind-input_glow.golden
@@ -5,7 +5,7 @@
                               │                            │
                               │                            │
                               │                            │
-> glow                        │                            │
-  1/9                         │                            │
-> glow█                       └────────────────────────────┘
+> glow                        │                            │
+  1/9                         │                            │
+> glow█                       └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-input_lo.golden b/testdata/fixtures/testfind-input_lo.golden
index 0a5c647..4f39df8 100644
--- a/testdata/fixtures/testfind-input_lo.golden
+++ b/testdata/fixtures/testfind-input_lo.golden
@@ -5,7 +5,7 @@
                               │                            │
                               │                            │
   closing                     │                            │
-> glow                        │                            │
-  2/9                         │                            │
-> lo█                         └────────────────────────────┘
+> glow                        │                            │
+  2/9                         │                            │
+> lo█                         └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-long_item.golden b/testdata/fixtures/testfind-long_item.golden
index b31ab20..b84ccdc 100644
--- a/testdata/fixtures/testfind-long_item.golden
+++ b/testdata/fixtures/testfind-long_item.golden
@@ -2,10 +2,10 @@
   メーベル                    │ Name: ソラニン             │
   glow                        │ Artist: ASIAN KUNG-FU GEN..│
   closing                     │                            │
-> ソラニン                    │                            │
+> ソラニン                    │                            │
   adrenaline!!!               │                            │
   ヒトリノ夜                  │                            │
   あの日自分が出て行ってや..  │                            │
-  9/9                         │                            │
-> █                           └────────────────────────────┘
+  9/9                         │                            │
+> █                           └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-paging.golden b/testdata/fixtures/testfind-paging.golden
index a2ae44c..3807efd 100644
--- a/testdata/fixtures/testfind-paging.golden
+++ b/testdata/fixtures/testfind-paging.golden
@@ -1,4 +1,4 @@
-> Catch the Moment            ┌────────────────────────────┐
+> Catch the Moment            ┌────────────────────────────┐
   ICHIDAIJI                   │ Name: Catch the Moment     │
   メーベル                    │ Artist: LiSA               │
   glow                        │                            │
@@ -6,6 +6,6 @@
   ソラニン                    │                            │
   adrenaline!!!               │                            │
   ヒトリノ夜                  │                            │
-  9/9                         │                            │
-> █                           └────────────────────────────┘
+  9/9                         │                            │
+> █                           └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind-tab_doesnt_work.golden b/testdata/fixtures/testfind-tab_doesnt_work.golden
index f386d2d..3548920 100644
--- a/testdata/fixtures/testfind-tab_doesnt_work.golden
+++ b/testdata/fixtures/testfind-tab_doesnt_work.golden
@@ -5,7 +5,7 @@
   ソラニン                    │                            │
   adrenaline!!!               │                            │
   ヒトリノ夜                  │                            │
-> あの日自分が出て行ってや..  │                            │
-  9/9                         │                            │
-> █                           └────────────────────────────┘
+> あの日自分が出て行ってや..  │                            │
+  9/9                         │                            │
+> █                           └────────────────────────────┘
 
\ No newline at end of file
diff --git a/testdata/fixtures/testfind_hotreload.golden b/testdata/fixtures/testfind_hotreload.golden
index 4a567d3..e727483 100644
--- a/testdata/fixtures/testfind_hotreload.golden
+++ b/testdata/fixtures/testfind_hotreload.golden
@@ -5,7 +5,7 @@
                               │                            │
                               │                            │
                               │                            │
-> adrenaline!!!               │                            │
-  1/9                         │                            │
-> adrena█                     └────────────────────────────┘
+> adrenaline!!!               │                            │
+  1/9                         │                            │
+> adrena█                     └────────────────────────────┘
 
\ No newline at end of file