misc: Upgrade Go to v1.21

Upgrade to 1.21 as 1.20 is now unmaintained.

Most changes are related to the new `slices` package from standard
library, which can replace some existing custom functions.

.github/workflows/build-macos.yml

@@ -24,7 +24,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v4
       with:
-        go-version: '1.20'
+        go-version: '1.21'
 
     - name: Install Dependencies
       run: brew install --force mpv && brew install dylibbundler

.github/workflows/build-ubuntu.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v4
       with:
-        go-version: '1.20'
+        go-version: '1.21'
 
     - name: Install dependencies
       run: sudo apt update && sudo apt install libmpv-dev gcc libegl1-mesa-dev xorg-dev

.github/workflows/build-windows.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v4
       with:
-        go-version: '1.20'
+        go-version: '1.21'
 
     - name: Install Dependencies
       run: >

backend/app.go

@@ -8,12 +8,12 @@ import (
 	"os"
 	"path"
 	"reflect"
+	"slices"
 	"time"
 
 	"github.com/dweymouth/supersonic/backend/player"
 	"github.com/dweymouth/supersonic/backend/player/mpv"
 	"github.com/dweymouth/supersonic/backend/util"
-	"github.com/dweymouth/supersonic/sharedutil"
 	"github.com/fsnotify/fsnotify"
 	"github.com/google/uuid"
 
@@ -233,7 +233,7 @@ func (a *App) setupMPV() error {
 	a.LocalPlayer.SetAudioDevice(desiredDevice)
 
 	rgainOpts := []string{ReplayGainNone, ReplayGainAlbum, ReplayGainTrack, ReplayGainAuto}
-	if !sharedutil.SliceContains(rgainOpts, a.Config.ReplayGain.Mode) {
+	if !slices.Contains(rgainOpts, a.Config.ReplayGain.Mode) {
 		a.Config.ReplayGain.Mode = ReplayGainNone
 	}
 	mode := player.ReplayGainNone

backend/mediaprovider/helpers/iterators.go

@@ -64,9 +64,7 @@ func (r *baseIter[T]) Next() *T {
 		}
 		r.serverPos += len(items)
 		if !r.filter.IsNil() {
-			items = sharedutil.FilterSlice(items, func(al *T) bool {
-				return r.filter.Matches(al)
-			})
+			items = sharedutil.FilterSlice(items, r.filter.Matches)
 		}
 		r.prefetched = items
 		if len(items) > 0 {

backend/util/util.go

@@ -5,15 +5,6 @@ import (
 	"os"
 )
 
-// Return a slice of range [0, n)
-func Range(n int) []int {
-	s := make([]int, n)
-	for i := 0; i < n; i++ {
-		s[i] = i
-	}
-	return s
-}
-
 func CopyFile(srcPath, dstPath string) error {
 	fin, err := os.Open(srcPath)
 	if err != nil {

go.mod

@@ -1,6 +1,6 @@
 module github.com/dweymouth/supersonic
 
-go 1.20
+go 1.21
 
 require (
 	fyne.io/fyne/v2 v2.4.4

go.sum

@@ -110,6 +110,7 @@ github.com/go-text/render v0.0.0-20230619120952-35bccb6164b8/go.mod h1:h29xCucjN
 github.com/go-text/typesetting v0.1.0 h1:vioSaLPYcHwPEPLT7gsjCGDCoYSbljxoHJzMnKwVvHw=
 github.com/go-text/typesetting v0.1.0/go.mod h1:d22AnmeKq/on0HNv73UFriMKc4Ez6EqZAofLhAzpSzI=
 github.com/go-text/typesetting-utils v0.0.0-20231211103740-d9332ae51f04 h1:zBx+p/W2aQYtNuyZNcTfinWvXBQwYtDfme051PR/lAY=
+github.com/go-text/typesetting-utils v0.0.0-20231211103740-d9332ae51f04/go.mod h1:DDxDdQEnB70R8owOx3LVpEFvpMK9eeH1o2r0yZhFI9o=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/godbus/dbus/v5 v5.0.6/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/godbus/dbus/v5 v5.1.0 h1:4KLkAxT3aOY8Li4FRJe/KvhoNFFxo0m6fNuFUO8QJUk=

sharedutil/sharedutil.go

@@ -2,32 +2,11 @@ package sharedutil
 
 import (
 	"math"
-	"sort"
+	"slices"
 
 	"github.com/dweymouth/supersonic/backend/mediaprovider"
 )
 
-func SliceEqual[T comparable](a []T, b []T) bool {
-	if len(a) != len(b) {
-		return false
-	}
-	for i := 0; i < len(a); i++ {
-		if a[i] != b[i] {
-			return false
-		}
-	}
-	return true
-}
-
-func SliceContains[T comparable](ts []T, t T) bool {
-	for _, x := range ts {
-		if x == t {
-			return true
-		}
-	}
-	return false
-}
-
 func FilterSlice[T any](ss []T, test func(T) bool) []T {
 	if ss == nil {
 		return nil
@@ -52,19 +31,6 @@ func MapSlice[T any, U any](ts []T, f func(T) U) []U {
 	return result
 }
 
-func Find[T any](ts []T, f func(T) bool) int {
-	for i, tt := range ts {
-		if f(tt) {
-			return i
-		}
-	}
-	return -1
-}
-
-func IndexOf[T comparable](ts []T, t T) int {
-	return Find(ts, func(tt T) bool { return t == tt })
-}
-
 func Reversed[T any](ts []T) []T {
 	if ts == nil {
 		return nil
@@ -133,7 +99,7 @@ func ReorderTracks(tracks []*mediaprovider.Track, idxToMove []int, op TrackReord
 		topIdx := 0
 		botIdx := len(idxToMove)
 		for i, t := range tracks {
-			if SliceContains(idxToMove, i) {
+			if slices.Contains(idxToMove, i) {
 				newTracks[topIdx] = t
 				topIdx++
 			} else {
@@ -145,7 +111,7 @@ func ReorderTracks(tracks []*mediaprovider.Track, idxToMove []int, op TrackReord
 		topIdx := 0
 		botIdx := len(tracks) - len(idxToMove)
 		for i, t := range tracks {
-			if SliceContains(idxToMove, i) {
+			if slices.Contains(idxToMove, i) {
 				newTracks[botIdx] = t
 				botIdx++
 			} else {
@@ -178,7 +144,7 @@ func ReorderTracks(tracks []*mediaprovider.Track, idxToMove []int, op TrackReord
 
 func firstIdxCanMoveUp(idxs []int) int {
 	prevIdx := -1
-	sort.Ints(idxs)
+	slices.Sort(idxs)
 	for _, idx := range idxs {
 		if idx > prevIdx+1 {
 			return idx
@@ -190,7 +156,7 @@ func firstIdxCanMoveUp(idxs []int) int {
 
 func lastIdxCanMoveDown(idxs []int, lenSlice int) int {
 	prevIdx := lenSlice
-	sort.Ints(idxs)
+	slices.Sort(idxs)
 	for i := len(idxs) - 1; i >= 0; i-- {
 		idx := idxs[i]
 		if idx < prevIdx-1 {

sharedutil/sharedutil_test.go

@@ -1,6 +1,7 @@
 package sharedutil
 
 import (
+	"slices"
 	"testing"
 
 	"github.com/dweymouth/supersonic/backend/mediaprovider"
@@ -79,13 +80,7 @@ func Test_ReorderTracks(t *testing.T) {
 
 func tracklistsEqual(t *testing.T, a, b []*mediaprovider.Track) bool {
 	t.Helper()
-	if len(a) != len(b) {
-		return false
-	}
-	for i, _ := range a {
-		if a[i].ID != b[i].ID {
-			return false
-		}
-	}
-	return true
+	return slices.EqualFunc(a, b, func(a, b *mediaprovider.Track) bool {
+		return a.ID == b.ID
+	})
 }

ui/browsing/albumspage.go

@@ -1,11 +1,12 @@
 package browsing
 
 import (
+	"slices"
+
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/widget"
 	"github.com/dweymouth/supersonic/backend"
 	"github.com/dweymouth/supersonic/backend/mediaprovider"
-	"github.com/dweymouth/supersonic/sharedutil"
 	"github.com/dweymouth/supersonic/ui/controller"
 	myTheme "github.com/dweymouth/supersonic/ui/theme"
 	"github.com/dweymouth/supersonic/ui/util"
@@ -37,7 +38,7 @@ func (a *albumsPageAdapter) Route() controller.Route { return controller.AlbumsR
 func (a *albumsPageAdapter) SortOrders() ([]string, string) {
 	orders := a.mp.AlbumSortOrders()
 	sortOrder := a.cfg.SortOrder
-	if !sharedutil.SliceContains(orders, sortOrder) {
+	if !slices.Contains(orders, sortOrder) {
 		sortOrder = string(orders[0])
 	}
 	return orders, sortOrder

ui/browsing/nowplayingpage.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"image"
 	"log"
+	"slices"
 	"strings"
 
 	"github.com/dweymouth/supersonic/backend"
@@ -106,13 +107,13 @@ func NewNowPlayingPage(
 	}
 	a.queueList.OnSetRating = func(trackIDs []string, rating int) {
 		contr.SetTrackRatings(trackIDs, rating)
-		if sharedutil.SliceContains(trackIDs, a.nowPlayingID) {
+		if slices.Contains(trackIDs, a.nowPlayingID) {
 			a.card.SetDisplayedRating(rating)
 		}
 	}
 	a.queueList.OnSetFavorite = func(trackIDs []string, fav bool) {
 		contr.SetTrackFavorites(trackIDs, fav)
-		if sharedutil.SliceContains(trackIDs, a.nowPlayingID) {
+		if slices.Contains(trackIDs, a.nowPlayingID) {
 			a.card.SetDisplayedFavorite(fav)
 		}
 	}
@@ -232,7 +233,7 @@ func (a *NowPlayingPage) Tapped(*fyne.PointEvent) {
 func (a *NowPlayingPage) doSetNewTrackOrder(trackIDs []string, op sharedutil.TrackReorderOp) {
 	idxs := make([]int, 0, len(trackIDs))
 	for i, tr := range a.queue {
-		if sharedutil.SliceContains(trackIDs, tr.ID) {
+		if slices.Contains(trackIDs, tr.ID) {
 			idxs = append(idxs, i)
 		}
 	}

ui/browsing/playlistpage.go

@@ -3,6 +3,7 @@ package browsing
 import (
 	"fmt"
 	"log"
+	"slices"
 
 	"github.com/dweymouth/supersonic/backend"
 	"github.com/dweymouth/supersonic/backend/mediaprovider"
@@ -183,7 +184,7 @@ func (a *PlaylistPage) doSetNewTrackOrder(op sharedutil.TrackReorderOp) {
 	ids := a.tracklist.SelectedTrackIDs()
 	idxs := make([]int, 0, len(ids))
 	for i, tr := range a.tracks {
-		if sharedutil.SliceContains(ids, tr.ID) {
+		if slices.Contains(ids, tr.ID) {
 			idxs = append(idxs, i)
 		}
 	}

ui/theme/theme.go

@@ -4,15 +4,15 @@ import (
 	"bytes"
 	"errors"
 	"image/color"
-	"io/ioutil"
 	"log"
+	"os"
 	"path"
 	"path/filepath"
+	"slices"
 	"strings"
 
 	"github.com/dweymouth/supersonic/backend"
 	"github.com/dweymouth/supersonic/res"
-	"github.com/dweymouth/supersonic/sharedutil"
 
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/theme"
@@ -200,7 +200,7 @@ func (m *MyTheme) Font(style fyne.TextStyle) fyne.Resource {
 		}
 	case fyne.TextStyle{Bold: true}:
 		if m.BoldFont != "" && boldFont == nil {
-			if content, err := ioutil.ReadFile(m.BoldFont); err != nil {
+			if content, err := os.ReadFile(m.BoldFont); err != nil {
 				m.BoldFont = ""
 			} else {
 				normalFont = fyne.NewStaticResource("boldFont", content)
@@ -222,7 +222,7 @@ func (m *MyTheme) Size(name fyne.ThemeSizeName) float32 {
 
 func (m *MyTheme) getVariant() fyne.ThemeVariant {
 	v := DefaultAppearance // default if config has invalid or missing setting
-	if sharedutil.SliceContains(
+	if slices.Contains(
 		[]string{string(AppearanceLight), string(AppearanceDark), string(AppearanceAuto)},
 		m.config.Appearance) {
 		v = AppearanceMode(m.config.Appearance)
@@ -242,7 +242,7 @@ func readTTFFile(filepath string) ([]byte, error) {
 		log.Printf("error loading custom font %q: %s", filepath, err.Error())
 		return nil, err
 	}
-	content, err := ioutil.ReadFile(filepath)
+	content, err := os.ReadFile(filepath)
 	if err != nil {
 		log.Printf("error loading custom font %q: %s", filepath, err.Error())
 	}

ui/theme/themefile.go

@@ -7,11 +7,11 @@ import (
 	"image/color"
 	"io"
 	"os"
+	"slices"
 	"strings"
 
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/theme"
-	"github.com/dweymouth/supersonic/sharedutil"
 	"github.com/pelletier/go-toml/v2"
 )
 
@@ -109,7 +109,7 @@ func DecodeThemeFile(reader io.Reader) (*ThemeFile, error) {
 		return nil, err
 	}
 
-	if theme.SupersonicTheme.Name == "" || !sharedutil.SliceContains(validThemeVersions, theme.SupersonicTheme.Version) {
+	if theme.SupersonicTheme.Name == "" || !slices.Contains(validThemeVersions, theme.SupersonicTheme.Version) {
 		return nil, errors.New("invalid theme file name or version")
 	}
 	if !(theme.SupersonicTheme.SupportsDark || theme.SupersonicTheme.SupportsLight) {
@@ -129,7 +129,7 @@ func (t *ThemeFile) SupportsVariant(v fyne.ThemeVariant) bool {
 
 // Parses a CSS-style #RRGGBB or #RRGGBBAA string
 func ColorStringToColor(colorStr string) (color.Color, error) {
-	if !strings.HasPrefix(colorStr, "#") || !sharedutil.SliceContains([]int{7, 9}, len(colorStr)) {
+	if !strings.HasPrefix(colorStr, "#") || !slices.Contains([]int{7, 9}, len(colorStr)) {
 		return color.Black, errors.New("invalid color string")
 	}
 	colorBytes := make([]byte, 4)

ui/util/tracklistutil.go

@@ -1,6 +1,8 @@
 package util
 
 import (
+	"slices"
+
 	"github.com/dweymouth/supersonic/backend/mediaprovider"
 	"github.com/dweymouth/supersonic/sharedutil"
 )
@@ -69,15 +71,15 @@ func SelectTrackRange(tracks []*TrackListModel, idx int) {
 		tracks[idx].Selected = true
 		return
 	}
-	from := minInt(idx, lastSelected)
-	to := maxInt(idx, lastSelected)
+	from := min(idx, lastSelected)
+	to := max(idx, lastSelected)
 	for i := from; i <= to; i++ {
 		tracks[i].Selected = true
 	}
 }
 
 func FindTrackByID(tracks []*TrackListModel, id string) (*mediaprovider.Track, int) {
-	idx := sharedutil.Find(tracks, func(tr *TrackListModel) bool {
+	idx := slices.IndexFunc(tracks, func(tr *TrackListModel) bool {
 		return tr.Track.ID == id
 	})
 	if idx >= 0 {
@@ -85,17 +87,3 @@ func FindTrackByID(tracks []*TrackListModel, id string) (*mediaprovider.Track, i
 	}
 	return nil, -1
 }
-
-func minInt(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}
-
-func maxInt(a, b int) int {
-	if a > b {
-		return a
-	}
-	return b
-}

ui/widgets/albumfilterbutton.go

@@ -2,7 +2,7 @@ package widgets
 
 import (
 	"fmt"
-	"sort"
+	"slices"
 	"strconv"
 	"strings"
 	"sync"
@@ -49,7 +49,7 @@ func NewAlbumFilterButton(filter *mediaprovider.AlbumFilter, fetchGenresFunc fun
 			genreNames := sharedutil.MapSlice(genres, func(g *mediaprovider.Genre) string {
 				return g.Name
 			})
-			sort.Strings(genreNames)
+			slices.Sort(genreNames)
 			a.genreListChan <- genreNames
 		}
 	}()

ui/widgets/gridviewitem.go

@@ -3,9 +3,9 @@ package widgets
 import (
 	"image"
 	"image/color"
+	"slices"
 
 	"github.com/dweymouth/supersonic/res"
-	"github.com/dweymouth/supersonic/sharedutil"
 	"github.com/dweymouth/supersonic/ui/layouts"
 	"github.com/dweymouth/supersonic/ui/util"
 
@@ -205,7 +205,7 @@ func (g *GridViewItem) createContainer() {
 }
 
 func (g *GridViewItem) NeedsUpdate(model GridViewItemModel) bool {
-	return g.itemID != model.ID || !sharedutil.SliceEqual(g.secondaryIDs, model.SecondaryIDs)
+	return g.itemID != model.ID || !slices.Equal(g.secondaryIDs, model.SecondaryIDs)
 }
 
 func (g *GridViewItem) Update(model GridViewItemModel) {

ui/widgets/tracklist.go

@@ -3,6 +3,7 @@ package widgets
 import (
 	"fmt"
 	"log"
+	"slices"
 	"sort"
 	"strconv"
 	"strings"
@@ -271,7 +272,7 @@ func (t *Tracklist) Sorting() TracklistSort {
 func (t *Tracklist) SetSorting(sorting TracklistSort) {
 	if sorting.ColumnName == "" {
 		// nil case - reset current sort
-		if sharedutil.SliceContains(columns, t.sorting.ColumnName) {
+		if slices.Contains(columns, t.sorting.ColumnName) {
 			t.hdr.SetSorting(ListHeaderSort{ColNumber: ColNumber(t.sorting.ColumnName), Type: SortNone})
 		}
 		return
@@ -667,7 +668,7 @@ func (t *Tracklist) lenTracks() int {
 }
 
 func ColNumber(colName string) int {
-	i := sharedutil.IndexOf(columns, colName)
+	i := slices.Index(columns, colName)
 	if i < 0 {
 		log.Printf("error: Tracklist: invalid column name %s", colName)
 	}