chore: add modernizer linter (#11936)

- Go has a suite of small linters that helps with modernizing Go code by using newer functions and catching small mistakes, https://pkg.go.dev/golang.org/x/tools/go/analysis/passes/modernize.
- Enable this linter in golangci-lint.
- There's also [`go fix`](https://go.dev/blog/gofix), which is not yet released as a linter in golangci-lint: https://github.com/golangci/golangci-lint/pull/6385

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/11936
Reviewed-by: Mathieu Fenniak <mfenniak@noreply.codeberg.org>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>

.golangci.yml

@@ -15,6 +15,7 @@ linters:
     - govet
     - importas
     - ineffassign
+    - modernize
     - nakedret
     - nolintlint
     - revive

cmd/cert.go

@@ -150,8 +150,8 @@ func runCert(ctx context.Context, c *cli.Command) error {
 		BasicConstraintsValid: true,
 	}
 
-	hosts := strings.Split(c.String("host"), ",")
-	for _, h := range hosts {
+	hosts := strings.SplitSeq(c.String("host"), ",")
+	for h := range hosts {
 		if ip := net.ParseIP(h); ip != nil {
 			template.IPAddresses = append(template.IPAddresses, ip)
 		} else {

cmd/dump.go

@@ -12,6 +12,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"slices"
 	"strings"
 	"sync"
 	"time"
@@ -83,11 +84,9 @@ func (o outputType) Join() string {
 }
 
 func (o *outputType) Set(value string) error {
-	for _, enum := range o.Enum {
-		if enum == value {
-			o.selected = value
-			return nil
-		}
+	if slices.Contains(o.Enum, value) {
+		o.selected = value
+		return nil
 	}
 
 	return fmt.Errorf("allowed values are %s", o.Join())
@@ -250,8 +249,8 @@ func runDump(stdCtx context.Context, ctx *cli.Command) error {
 		setupConsoleLogger(log.FATAL, log.CanColorStderr, os.Stderr)
 	} else {
 		for _, suffix := range outputTypeEnum.Enum {
-			if strings.HasSuffix(fileName, "."+suffix) {
-				fileName = strings.TrimSuffix(fileName, "."+suffix)
+			if before, ok := strings.CutSuffix(fileName, "."+suffix); ok {
+				fileName = before
 				break
 			}
 		}
@@ -330,14 +329,12 @@ func runDump(stdCtx context.Context, ctx *cli.Command) error {
 	go dumpDatabase(ctx, archiveJobs, &wg, verbose)
 
 	if len(setting.CustomConf) > 0 {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
+		wg.Go(func() {
 			log.Info("Adding custom configuration file from %s", setting.CustomConf)
 			if err := addFile(archiveJobs, "app.ini", setting.CustomConf, verbose); err != nil {
 				fatal("Failed to include specified app.ini: %v", err)
 			}
-		}()
+		})
 	}
 
 	if ctx.IsSet("skip-custom-dir") && ctx.Bool("skip-custom-dir") {
@@ -361,15 +358,13 @@ func runDump(stdCtx context.Context, ctx *cli.Command) error {
 	if ctx.IsSet("skip-attachment-data") && ctx.Bool("skip-attachment-data") {
 		log.Info("Skipping attachment data")
 	} else {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
+		wg.Go(func() {
 			if err := storage.Attachments.IterateObjects("", func(objPath string, object storage.Object) error {
 				return addObject(archiveJobs, object, path.Join("data", "attachments", objPath), verbose)
 			}); err != nil {
 				fatal("Failed to dump attachments: %v", err)
 			}
-		}()
+		})
 	}
 
 	if ctx.IsSet("skip-package-data") && ctx.Bool("skip-package-data") {
@@ -377,15 +372,13 @@ func runDump(stdCtx context.Context, ctx *cli.Command) error {
 	} else if !setting.Packages.Enabled {
 		log.Info("Package registry not enabled - skipping")
 	} else {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
+		wg.Go(func() {
 			if err := storage.Packages.IterateObjects("", func(objPath string, object storage.Object) error {
 				return addObject(archiveJobs, object, path.Join("data", "packages", objPath), verbose)
 			}); err != nil {
 				fatal("Failed to dump packages: %v", err)
 			}
-		}()
+		})
 	}
 
 	// Doesn't check if LogRootPath exists before processing --skip-log intentionally,
@@ -399,13 +392,11 @@ func runDump(stdCtx context.Context, ctx *cli.Command) error {
 			log.Error("Failed to check if %s exists: %v", setting.Log.RootPath, err)
 		}
 		if isExist {
-			wg.Add(1)
-			go func() {
-				defer wg.Done()
+			wg.Go(func() {
 				if err := addRecursiveExclude(archiveJobs, "log", setting.Log.RootPath, []string{absFileName}, verbose); err != nil {
 					fatal("Failed to include log: %v", err)
 				}
-			}()
+			})
 		}
 	}
 

cmd/dump_repo.go

@@ -143,8 +143,8 @@ func runDumpRepository(stdCtx context.Context, ctx *cli.Command) error {
 		opts.PullRequests = true
 		opts.ReleaseAssets = true
 	} else {
-		units := strings.Split(ctx.String("units"), ",")
-		for _, unit := range units {
+		units := strings.SplitSeq(ctx.String("units"), ",")
+		for unit := range units {
 			switch strings.ToLower(strings.TrimSpace(unit)) {
 			case "":
 				continue

models/actions/status.go

@@ -4,6 +4,8 @@
 package actions
 
 import (
+	"slices"
+
 	"forgejo.org/modules/translation"
 
 	runnerv1 "code.forgejo.org/forgejo/actions-proto/runner/v1"
@@ -107,12 +109,7 @@ func (s Status) IsBlocked() bool {
 
 // In returns whether s is one of the given statuses
 func (s Status) In(statuses ...Status) bool {
-	for _, v := range statuses {
-		if s == v {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(statuses, s)
 }
 
 func (s Status) AsResult() runnerv1.Result {

models/activities/action.go

@@ -132,12 +132,7 @@ func (at ActionType) String() string {
 }
 
 func (at ActionType) InActions(actions ...string) bool {
-	for _, action := range actions {
-		if action == at.String() {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(actions, at.String())
 }
 
 // Action represents user operation type and other information to

models/activities/notification_list.go

@@ -213,10 +213,7 @@ func (nl NotificationList) LoadRepos(ctx context.Context) (repo_model.Repository
 	repos := make(map[int64]*repo_model.Repository, len(repoIDs))
 	left := len(repoIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).
 			In("id", repoIDs[:limit]).
 			Rows(new(repo_model.Repository))
@@ -287,10 +284,7 @@ func (nl NotificationList) LoadIssues(ctx context.Context) ([]int, error) {
 	issues := make(map[int64]*issues_model.Issue, len(issueIDs))
 	left := len(issueIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).
 			In("id", issueIDs[:limit]).
 			Rows(new(issues_model.Issue))
@@ -382,10 +376,7 @@ func (nl NotificationList) LoadUsers(ctx context.Context) ([]int, error) {
 	users := make(map[int64]*user_model.User, len(userIDs))
 	left := len(userIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).
 			In("id", userIDs[:limit]).
 			Rows(new(user_model.User))
@@ -433,10 +424,7 @@ func (nl NotificationList) LoadComments(ctx context.Context) ([]int, error) {
 	comments := make(map[int64]*issues_model.Comment, len(commentIDs))
 	left := len(commentIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).
 			In("id", commentIDs[:limit]).
 			Rows(new(issues_model.Comment))

models/activities/repo_activity.go

@@ -138,10 +138,7 @@ func GetActivityStatsTopAuthors(ctx context.Context, repo *repo_model.Repository
 		return v[i].Commits > v[j].Commits
 	})
 
-	cnt := count
-	if cnt > len(v) {
-		cnt = len(v)
-	}
+	cnt := min(count, len(v))
 
 	return v[:cnt], nil
 }

models/auth/access_token_scope.go

@@ -5,6 +5,7 @@ package auth
 
 import (
 	"fmt"
+	"slices"
 	"strings"
 
 	"forgejo.org/models/perm"
@@ -204,12 +205,7 @@ func GetRequiredScopes(level AccessTokenScopeLevel, scopeCategories ...AccessTok
 
 // ContainsCategory checks if a list of categories contains a specific category
 func ContainsCategory(categories []AccessTokenScopeCategory, category AccessTokenScopeCategory) bool {
-	for _, c := range categories {
-		if c == category {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(categories, category)
 }
 
 // GetScopeLevelFromAccessMode converts permission access mode to scope level

models/auth/oauth2.go

@@ -505,7 +505,7 @@ func (grant *OAuth2Grant) IncreaseCounter(ctx context.Context) error {
 
 // ScopeContains returns true if the grant scope contains the specified scope
 func (grant *OAuth2Grant) ScopeContains(scope string) bool {
-	for _, currentScope := range strings.Split(grant.Scope, " ") {
+	for currentScope := range strings.SplitSeq(grant.Scope, " ") {
 		if scope == currentScope {
 			return true
 		}

models/auth/source.go

@@ -91,7 +91,7 @@ var registeredConfigs = map[Type]func() Config{}
 
 // RegisterTypeConfig register a config for a provided type
 func RegisterTypeConfig(typ Type, exemplar Config) {
-	if reflect.TypeOf(exemplar).Kind() == reflect.Ptr {
+	if reflect.TypeOf(exemplar).Kind() == reflect.Pointer {
 		// Pointer:
 		registeredConfigs[typ] = func() Config {
 			return reflect.New(reflect.ValueOf(exemplar).Elem().Type()).Interface().(Config)

models/db/iterate.go

@@ -80,7 +80,7 @@ func Iterate[Bean any](ctx context.Context, cond builder.Cond, f func(ctx contex
 
 func extractFieldValue(bean any, fieldName string) any {
 	v := reflect.ValueOf(bean)
-	if v.Kind() == reflect.Ptr {
+	if v.Kind() == reflect.Pointer {
 		v = v.Elem()
 	}
 	field := v.FieldByName(fieldName)

models/db/name.go

@@ -6,6 +6,7 @@ package db
 import (
 	"fmt"
 	"regexp"
+	"slices"
 	"strings"
 	"unicode/utf8"
 
@@ -114,10 +115,8 @@ func IsUsableName(names, patterns []string, name string) error {
 		return ErrNameEmpty
 	}
 
-	for i := range names {
-		if name == names[i] {
-			return ErrNameReserved{name}
-		}
+	if slices.Contains(names, name) {
+		return ErrNameReserved{name}
 	}
 
 	for _, pat := range patterns {

models/dbfs/dbfile.go

@@ -46,10 +46,7 @@ func (f *file) readAt(fileMeta *DbfsMeta, offset int64, p []byte) (n int, err er
 	blobPos := int(offset % f.blockSize)
 	blobOffset := offset - int64(blobPos)
 	blobRemaining := int(f.blockSize) - blobPos
-	needRead := len(p)
-	if needRead > blobRemaining {
-		needRead = blobRemaining
-	}
+	needRead := min(len(p), blobRemaining)
 	if blobOffset+int64(blobPos)+int64(needRead) > fileMeta.FileSize {
 		needRead = int(fileMeta.FileSize - blobOffset - int64(blobPos))
 	}
@@ -66,14 +63,8 @@ func (f *file) readAt(fileMeta *DbfsMeta, offset int64, p []byte) (n int, err er
 		blobData = nil
 	}
 
-	canCopy := len(blobData) - blobPos
-	if canCopy <= 0 {
-		canCopy = 0
-	}
-	realRead := needRead
-	if realRead > canCopy {
-		realRead = canCopy
-	}
+	canCopy := max(len(blobData)-blobPos, 0)
+	realRead := min(needRead, canCopy)
 	if realRead > 0 {
 		copy(p[:realRead], fileData.BlobData[blobPos:blobPos+realRead])
 	}
@@ -113,10 +104,7 @@ func (f *file) Write(p []byte) (n int, err error) {
 		blobPos := int(f.offset % f.blockSize)
 		blobOffset := f.offset - int64(blobPos)
 		blobRemaining := int(f.blockSize) - blobPos
-		needWrite := len(p)
-		if needWrite > blobRemaining {
-			needWrite = blobRemaining
-		}
+		needWrite := min(len(p), blobRemaining)
 		buf := make([]byte, f.blockSize)
 		readBytes, err := f.readAt(fileMeta, blobOffset, buf)
 		if err != nil && !errors.Is(err, io.EOF) {

models/git/protected_branch.go

@@ -213,7 +213,7 @@ func (protectBranch *ProtectedBranch) GetUnprotectedFilePatterns() []glob.Glob {
 
 func getFilePatterns(filePatterns string) []glob.Glob {
 	extarr := make([]glob.Glob, 0, 10)
-	for _, expr := range strings.Split(strings.ToLower(filePatterns), ";") {
+	for expr := range strings.SplitSeq(strings.ToLower(filePatterns), ";") {
 		expr = strings.TrimSpace(expr)
 		if expr != "" {
 			if g, err := glob.Compile(expr, '.', '/'); err != nil {

models/gitea_migrations/test/tests.go

@@ -265,7 +265,7 @@ func deleteDB() error {
 
 func removeAllWithRetry(dir string) error {
 	var err error
-	for i := 0; i < 20; i++ {
+	for range 20 {
 		err = os.RemoveAll(dir)
 		if err == nil {
 			break

models/gitea_migrations/v1_11/v111.go

@@ -5,6 +5,7 @@ package v1_11
 
 import (
 	"fmt"
+	"slices"
 
 	"xorm.io/xorm"
 )
@@ -345,10 +346,8 @@ func AddBranchProtectionCanPushAndEnableWhitelist(x *xorm.Engine) error {
 			}
 			return AccessModeWrite <= perm.UnitsMode[UnitTypeCode], nil
 		}
-		for _, id := range protectedBranch.ApprovalsWhitelistUserIDs {
-			if id == reviewer.ID {
-				return true, nil
-			}
+		if slices.Contains(protectedBranch.ApprovalsWhitelistUserIDs, reviewer.ID) {
+			return true, nil
 		}
 
 		// isUserInTeams

models/gitea_migrations/v1_11/v115.go

@@ -146,7 +146,7 @@ func copyOldAvatarToNewLocation(userID int64, oldAvatar string) (string, error)
 		return "", fmt.Errorf("io.ReadAll: %w", err)
 	}
 
-	newAvatar := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("%d-%x", userID, md5.Sum(data)))))
+	newAvatar := fmt.Sprintf("%x", md5.Sum(fmt.Appendf(nil, "%d-%x", userID, md5.Sum(data))))
 	if newAvatar == oldAvatar {
 		return newAvatar, nil
 	}

models/gitea_migrations/v1_20/v259.go

@@ -329,7 +329,7 @@ func ConvertScopedAccessTokens(x *xorm.Engine) error {
 	for _, token := range tokens {
 		var scopes []string
 		allNewScopesMap := make(map[AccessTokenScope]bool)
-		for _, oldScope := range strings.Split(token.Scope, ",") {
+		for oldScope := range strings.SplitSeq(token.Scope, ",") {
 			if newScopes, exists := accessTokenScopeMap[OldAccessTokenScope(oldScope)]; exists {
 				for _, newScope := range newScopes {
 					allNewScopesMap[newScope] = true

models/issues/comment.go

@@ -9,6 +9,7 @@ import (
 	"context"
 	"fmt"
 	"html/template"
+	"slices"
 	"strconv"
 	"unicode/utf8"
 
@@ -198,12 +199,7 @@ func (t CommentType) HasMailReplySupport() bool {
 }
 
 func (t CommentType) CountedAsConversation() bool {
-	for _, ct := range ConversationCountedCommentType() {
-		if t == ct {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(ConversationCountedCommentType(), t)
 }
 
 // ConversationCountedCommentType returns the comment types that are counted as a conversation
@@ -619,7 +615,7 @@ func (c *Comment) UpdateAttachments(ctx context.Context, uuids []string) error {
 	if err != nil {
 		return fmt.Errorf("FindRepoAttachmentsByUUID[uuids=%q,repoID=%d]: %w", uuids, c.Issue.RepoID, err)
 	}
-	for i := 0; i < len(attachments); i++ {
+	for i := range attachments {
 		attachments[i].IssueID = c.IssueID
 		attachments[i].CommentID = c.ID
 		if err := repo_model.UpdateAttachment(ctx, attachments[i]); err != nil {

models/issues/comment_list.go

@@ -54,10 +54,7 @@ func (comments CommentList) loadLabels(ctx context.Context) error {
 	commentLabels := make(map[int64]*Label, len(labelIDs))
 	left := len(labelIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).
 			In("id", labelIDs[:limit]).
 			Rows(new(Label))
@@ -104,10 +101,7 @@ func (comments CommentList) loadMilestones(ctx context.Context) error {
 	milestones := make(map[int64]*Milestone, len(milestoneIDs))
 	left := len(milestoneIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		err := db.GetEngine(ctx).
 			In("id", milestoneIDs[:limit]).
 			Find(&milestones)
@@ -143,10 +137,7 @@ func (comments CommentList) loadOldMilestones(ctx context.Context) error {
 	milestones := make(map[int64]*Milestone, len(milestoneIDs))
 	left := len(milestoneIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		err := db.GetEngine(ctx).
 			In("id", milestoneIDs[:limit]).
 			Find(&milestones)
@@ -178,10 +169,7 @@ func (comments CommentList) loadAssignees(ctx context.Context) error {
 	assignees := make(map[int64]*user_model.User, len(assigneeIDs))
 	left := len(assigneeIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).
 			In("id", assigneeIDs[:limit]).
 			Rows(new(user_model.User))
@@ -246,10 +234,7 @@ func (comments CommentList) LoadIssues(ctx context.Context) error {
 	issues := make(map[int64]*Issue, len(issueIDs))
 	left := len(issueIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).
 			In("id", issueIDs[:limit]).
 			Rows(new(Issue))
@@ -300,10 +285,7 @@ func (comments CommentList) loadDependentIssues(ctx context.Context) error {
 	issues := make(map[int64]*Issue, len(issueIDs))
 	left := len(issueIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := e.
 			In("id", issueIDs[:limit]).
 			Rows(new(Issue))
@@ -379,10 +361,7 @@ func (comments CommentList) LoadAttachments(ctx context.Context) (err error) {
 	commentsIDs := comments.getAttachmentCommentIDs()
 	left := len(commentsIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).
 			In("comment_id", commentsIDs[:limit]).
 			Rows(new(repo_model.Attachment))

models/issues/issue_list.go

@@ -43,10 +43,7 @@ func (issues IssueList) LoadRepositories(ctx context.Context) (repo_model.Reposi
 	repoMaps := make(map[int64]*repo_model.Repository, len(repoIDs))
 	left := len(repoIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		err := db.GetEngine(ctx).
 			In("id", repoIDs[:limit]).
 			Find(&repoMaps)
@@ -99,10 +96,7 @@ func getPostersByIDs(ctx context.Context, posterIDs []int64) (map[int64]*user_mo
 	posterMaps := make(map[int64]*user_model.User, len(posterIDs))
 	left := len(posterIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		err := db.GetEngine(ctx).
 			In("id", posterIDs[:limit]).
 			Find(&posterMaps)
@@ -137,10 +131,7 @@ func (issues IssueList) LoadLabels(ctx context.Context) error {
 	issueIDs := issues.getIssueIDs()
 	left := len(issueIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).Table("label").
 			Join("LEFT", "issue_label", "issue_label.label_id = label.id").
 			In("issue_label.issue_id", issueIDs[:limit]).
@@ -192,10 +183,7 @@ func (issues IssueList) LoadMilestones(ctx context.Context) error {
 	milestoneMaps := make(map[int64]*Milestone, len(milestoneIDs))
 	left := len(milestoneIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		err := db.GetEngine(ctx).
 			In("id", milestoneIDs[:limit]).
 			Find(&milestoneMaps)
@@ -224,10 +212,7 @@ func (issues IssueList) LoadProjects(ctx context.Context) error {
 	}
 
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 
 		projects := make([]*projectWithIssueID, 0, limit)
 		err := db.GetEngine(ctx).
@@ -266,10 +251,7 @@ func (issues IssueList) LoadAssignees(ctx context.Context) error {
 	issueIDs := issues.getIssueIDs()
 	left := len(issueIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).Table("issue_assignees").
 			Join("INNER", "`user`", "`user`.id = `issue_assignees`.assignee_id").
 			In("`issue_assignees`.issue_id", issueIDs[:limit]).OrderBy(user_model.GetOrderByName()).
@@ -327,10 +309,7 @@ func (issues IssueList) LoadPullRequests(ctx context.Context) error {
 	pullRequestMaps := make(map[int64]*PullRequest, len(issuesIDs))
 	left := len(issuesIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).
 			In("issue_id", issuesIDs[:limit]).
 			Rows(new(PullRequest))
@@ -375,10 +354,7 @@ func (issues IssueList) LoadAttachments(ctx context.Context) (err error) {
 	issuesIDs := issues.getIssueIDs()
 	left := len(issuesIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).
 			In("issue_id", issuesIDs[:limit]).
 			Rows(new(repo_model.Attachment))
@@ -420,10 +396,7 @@ func (issues IssueList) loadComments(ctx context.Context, cond builder.Cond) (er
 	issuesIDs := issues.getIssueIDs()
 	left := len(issuesIDs)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 		rows, err := db.GetEngine(ctx).Table("comment").
 			Join("INNER", "issue", "issue.id = comment.issue_id").
 			In("issue.id", issuesIDs[:limit]).
@@ -486,10 +459,7 @@ func (issues IssueList) loadTotalTrackedTimes(ctx context.Context) (err error) {
 
 	left := len(ids)
 	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
+		limit := min(left, db.DefaultMaxInSize)
 
 		// select issue_id, sum(time) from tracked_time where issue_id in (<issue ids in current page>) group by issue_id
 		rows, err := db.GetEngine(ctx).Table("tracked_time").

models/issues/issue_stats.go

@@ -94,10 +94,7 @@ func GetIssueStats(ctx context.Context, opts *IssuesOptions) (*IssueStats, error
 	// ids in a temporary table and join from them.
 	accum := &IssueStats{}
 	for i := 0; i < len(opts.IssueIDs); {
-		chunk := i + MaxQueryParameters
-		if chunk > len(opts.IssueIDs) {
-			chunk = len(opts.IssueIDs)
-		}
+		chunk := min(i+MaxQueryParameters, len(opts.IssueIDs))
 		stats, err := getIssueStatsChunk(ctx, opts, opts.IssueIDs[i:chunk])
 		if err != nil {
 			return nil, err

models/issues/issue_test.go

@@ -5,6 +5,7 @@ package issues_test
 
 import (
 	"fmt"
+	"slices"
 	"sort"
 	"sync"
 	"testing"
@@ -311,7 +312,7 @@ func TestIssue_ResolveMentions(t *testing.T) {
 		for i, user := range resolved {
 			ids[i] = user.ID
 		}
-		sort.Slice(ids, func(i, j int) bool { return ids[i] < ids[j] })
+		slices.Sort(ids)
 		assert.Equal(t, expected, ids)
 	}
 
@@ -338,7 +339,7 @@ func TestResourceIndex(t *testing.T) {
 	require.NoError(t, err)
 
 	var wg sync.WaitGroup
-	for i := 0; i < 100; i++ {
+	for i := range 100 {
 		wg.Add(1)
 		t.Run(fmt.Sprintf("issue %d", i+1), func(t *testing.T) {
 			t.Parallel()
@@ -369,7 +370,7 @@ func TestCorrectIssueStats(t *testing.T) {
 	issueAmount := issues_model.MaxQueryParameters + 10
 
 	var wg sync.WaitGroup
-	for i := 0; i < issueAmount; i++ {
+	for i := range issueAmount {
 		wg.Add(1)
 		go func(i int) {
 			testInsertIssue(t, fmt.Sprintf("Issue %d", i+1), "Bugs are nasty", 0)

models/issues/issue_update.go

@@ -244,7 +244,7 @@ func UpdateIssueAttachments(ctx context.Context, issue *Issue, uuids []string) (
 	if err != nil {
 		return fmt.Errorf("FindRepoAttachmentsByUUID[uuids=%q,repoID=%d]: %w", uuids, issue.RepoID, err)
 	}
-	for i := 0; i < len(attachments); i++ {
+	for i := range attachments {
 		attachments[i].IssueID = issue.ID
 		if err := repo_model.UpdateAttachment(ctx, attachments[i]); err != nil {
 			return fmt.Errorf("update attachment [id: %d]: %w", attachments[i].ID, err)

models/issues/review_list.go

@@ -20,7 +20,7 @@ type ReviewList []*Review
 // LoadReviewers loads reviewers
 func (reviews ReviewList) LoadReviewers(ctx context.Context) error {
 	reviewerIDs := make([]int64, len(reviews))
-	for i := 0; i < len(reviews); i++ {
+	for i := range reviews {
 		reviewerIDs[i] = reviews[i].ReviewerID
 	}
 	reviewers, err := user_model.GetPossibleUserByIDs(ctx, reviewerIDs)

models/issues/tracked_time.go

@@ -350,10 +350,7 @@ func GetIssueTotalTrackedTime(ctx context.Context, opts *IssuesOptions, isClosed
 	// we get the statistics in smaller chunks and get accumulates
 	var accum int64
 	for i := 0; i < len(opts.IssueIDs); {
-		chunk := i + MaxQueryParameters
-		if chunk > len(opts.IssueIDs) {
-			chunk = len(opts.IssueIDs)
-		}
+		chunk := min(i+MaxQueryParameters, len(opts.IssueIDs))
 		time, err := getIssueTotalTrackedTimeChunk(ctx, opts, isClosed, opts.IssueIDs[i:chunk])
 		if err != nil {
 			return 0, err

models/perm/access/repo_permission.go

@@ -6,6 +6,7 @@ package access
 import (
 	"context"
 	"fmt"
+	"strings"
 
 	actions_model "forgejo.org/models/actions"
 	"forgejo.org/models/db"
@@ -115,7 +116,8 @@ func (p *Permission) CanWriteIssuesOrPulls(isPull bool) bool {
 }
 
 func (p *Permission) LogString() string {
-	format := "<Permission AccessMode=%s, %d Units, %d UnitsMode(s): [ "
+	var format strings.Builder
+	format.WriteString("<Permission AccessMode=%s, %d Units, %d UnitsMode(s): [ ")
 	args := []any{p.AccessMode.String(), len(p.Units), len(p.UnitsMode)}
 
 	for i, unit := range p.Units {
@@ -127,15 +129,15 @@ func (p *Permission) LogString() string {
 				config = err.Error()
 			}
 		}
-		format += "\nUnits[%d]: ID: %d RepoID: %d Type: %s Config: %s"
+		format.WriteString("\nUnits[%d]: ID: %d RepoID: %d Type: %s Config: %s")
 		args = append(args, i, unit.ID, unit.RepoID, unit.Type.LogString(), config)
 	}
 	for key, value := range p.UnitsMode {
-		format += "\nUnitMode[%-v]: %-v"
+		format.WriteString("\nUnitMode[%-v]: %-v")
 		args = append(args, key.LogString(), value.LogString())
 	}
-	format += " ]>"
-	return fmt.Sprintf(format, args...)
+	format.WriteString(" ]>")
+	return fmt.Sprintf(format.String(), args...)
 }
 
 func GetActionRepoPermission(ctx context.Context, repo *repo_model.Repository, task *actions_model.ActionTask) (Permission, error) {

models/project/column_test.go

@@ -164,7 +164,7 @@ func Test_NewColumn(t *testing.T) {
 	require.NoError(t, err)
 	assert.Len(t, columns, 3)
 
-	for i := 0; i < maxProjectColumns-3; i++ {
+	for i := range maxProjectColumns - 3 {
 		err := NewColumn(db.DefaultContext, &Column{
 			Title:     fmt.Sprintf("column-%d", i+4),
 			ProjectID: project1.ID,

models/pull/review_state.go

@@ -6,6 +6,7 @@ package pull
 import (
 	"context"
 	"fmt"
+	"maps"
 
 	"forgejo.org/models/db"
 	"forgejo.org/modules/log"
@@ -100,9 +101,7 @@ func mergeFiles(oldFiles, newFiles map[string]ViewedState) map[string]ViewedStat
 		return oldFiles
 	}
 
-	for file, viewed := range newFiles {
-		oldFiles[file] = viewed
-	}
+	maps.Copy(oldFiles, newFiles)
 	return oldFiles
 }
 

models/repo/repo.go

@@ -9,6 +9,7 @@ import (
 	"errors"
 	"fmt"
 	"html/template"
+	"maps"
 	"net"
 	"net/url"
 	"path/filepath"
@@ -543,9 +544,7 @@ func (repo *Repository) ComposeMetas(ctx context.Context) map[string]string {
 func (repo *Repository) ComposeDocumentMetas(ctx context.Context) map[string]string {
 	if len(repo.DocumentRenderingMetas) == 0 {
 		metas := map[string]string{}
-		for k, v := range repo.ComposeMetas(ctx) {
-			metas[k] = v
-		}
+		maps.Copy(metas, repo.ComposeMetas(ctx))
 		metas["mode"] = "document"
 		repo.DocumentRenderingMetas = metas
 	}
@@ -786,8 +785,8 @@ func GetRepositoryByName(ctx context.Context, ownerID int64, name string) (*Repo
 
 // getRepositoryURLPathSegments returns segments (owner, reponame) extracted from a url
 func getRepositoryURLPathSegments(repoURL string) []string {
-	if strings.HasPrefix(repoURL, setting.AppURL) {
-		return strings.Split(strings.TrimPrefix(repoURL, setting.AppURL), "/")
+	if after, ok := strings.CutPrefix(repoURL, setting.AppURL); ok {
+		return strings.Split(after, "/")
 	}
 
 	sshURLVariants := [4]string{
@@ -798,8 +797,8 @@ func getRepositoryURLPathSegments(repoURL string) []string {
 	}
 
 	for _, sshURL := range sshURLVariants {
-		if strings.HasPrefix(repoURL, sshURL) {
-			return strings.Split(strings.TrimPrefix(repoURL, sshURL), "/")
+		if after, ok := strings.CutPrefix(repoURL, sshURL); ok {
+			return strings.Split(after, "/")
 		}
 	}
 

models/repo/repo_list.go

@@ -401,7 +401,7 @@ func SearchRepositoryCondition(opts *SearchRepoOptions) builder.Cond {
 	if opts.Keyword != "" {
 		// separate keyword
 		subQueryCond := builder.NewCond()
-		for _, v := range strings.Split(opts.Keyword, ",") {
+		for v := range strings.SplitSeq(opts.Keyword, ",") {
 			if opts.TopicOnly {
 				subQueryCond = subQueryCond.Or(builder.Eq{"topic.name": strings.ToLower(v)})
 			} else {
@@ -416,7 +416,7 @@ func SearchRepositoryCondition(opts *SearchRepoOptions) builder.Cond {
 		keywordCond := builder.In("id", subQuery)
 		if !opts.TopicOnly {
 			likes := builder.NewCond()
-			for _, v := range strings.Split(opts.Keyword, ",") {
+			for v := range strings.SplitSeq(opts.Keyword, ",") {
 				likes = likes.Or(builder.Like{"lower_name", strings.ToLower(v)})
 
 				// If the string looks like "org/repo", match against that pattern too

models/repo/repo_unit.go

@@ -237,10 +237,8 @@ func (cfg *ActionsConfig) IsWorkflowDisabled(file string) bool {
 }
 
 func (cfg *ActionsConfig) DisableWorkflow(file string) {
-	for _, workflow := range cfg.DisabledWorkflows {
-		if file == workflow {
-			return
-		}
+	if slices.Contains(cfg.DisabledWorkflows, file) {
+		return
 	}
 
 	cfg.DisabledWorkflows = append(cfg.DisabledWorkflows, file)

models/repo/upload.go

@@ -117,7 +117,7 @@ func DeleteUploads(ctx context.Context, uploads ...*Upload) (err error) {
 	defer committer.Close()
 
 	ids := make([]int64, len(uploads))
-	for i := 0; i < len(uploads); i++ {
+	for i := range uploads {
 		ids[i] = uploads[i].ID
 	}
 	if err = db.DeleteByIDs[Upload](ctx, ids...); err != nil {

models/unit/unit.go

@@ -248,22 +248,12 @@ func LoadUnitConfig() error {
 
 // UnitGlobalDisabled checks if unit type is global disabled
 func (u Type) UnitGlobalDisabled() bool {
-	for _, ud := range DisabledRepoUnitsGet() {
-		if u == ud {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(DisabledRepoUnitsGet(), u)
 }
 
 // CanBeDefault checks if the unit type can be a default repo unit
 func (u *Type) CanBeDefault() bool {
-	for _, nadU := range NotAllowedDefaultRepoUnits {
-		if *u == nadU {
-			return false
-		}
-	}
-	return true
+	return !slices.Contains(NotAllowedDefaultRepoUnits, *u)
 }
 
 // Unit is a section of one repository

models/unittest/fixture_loader.go

@@ -151,8 +151,8 @@ func (l *loader) buildFixtureFile(fixturePath string) (*fixtureFile, error) {
 			switch v := value.(type) {
 			case string:
 				// Try to decode hex.
-				if strings.HasPrefix(v, "0x") {
-					value, err = hex.DecodeString(strings.TrimPrefix(v, "0x"))
+				if after, ok := strings.CutPrefix(v, "0x"); ok {
+					value, err = hex.DecodeString(after)
 					if err != nil {
 						return nil, err
 					}

models/unittest/mock_http.go

@@ -102,13 +102,13 @@ func NewMockWebServer(t *testing.T, liveServerBaseURL, testDataDir string, liveM
 		// parse back the fixture file into a series of HTTP headers followed by response body
 		lines := strings.Split(stringFixture, "\n")
 		for idx, line := range lines {
-			colonIndex := strings.Index(line, ": ")
-			if colonIndex != -1 {
+			before, after, ok := strings.Cut(line, ": ")
+			if ok {
 				// Because we modified the body with ReplaceAll() above, we need to
 				// remove Content-Length. w.Write() should add it back.
-				header := line[0:colonIndex]
+				header := before
 				if !strings.EqualFold(header, "Content-Length") {
-					w.Header().Set(line[0:colonIndex], line[colonIndex+2:])
+					w.Header().Set(before, after)
 				}
 			} else {
 				// we reached the end of the headers (empty line), so what follows is the body

models/unittest/reflection.go

@@ -9,7 +9,7 @@ import (
 )
 
 func fieldByName(v reflect.Value, field string) reflect.Value {
-	if v.Kind() == reflect.Ptr {
+	if v.Kind() == reflect.Pointer {
 		v = v.Elem()
 	}
 	f := v.FieldByName(field)

models/user/avatar.go

@@ -108,7 +108,7 @@ func (u *User) IsUploadAvatarChanged(data []byte) bool {
 	if !u.UseCustomAvatar || len(u.Avatar) == 0 {
 		return true
 	}
-	avatarID := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("%d-%x", u.ID, md5.Sum(data)))))
+	avatarID := fmt.Sprintf("%x", md5.Sum(fmt.Appendf(nil, "%d-%x", u.ID, md5.Sum(data))))
 	return u.Avatar != avatarID
 }
 

models/user/email_address_test.go

@@ -5,6 +5,7 @@ package user_test
 
 import (
 	"fmt"
+	"slices"
 	"testing"
 
 	"forgejo.org/models/db"
@@ -77,12 +78,7 @@ func TestListEmails(t *testing.T) {
 	assert.Greater(t, count, int64(5))
 
 	contains := func(match func(s *user_model.SearchEmailResult) bool) bool {
-		for _, v := range emails {
-			if match(v) {
-				return true
-			}
-		}
-		return false
+		return slices.ContainsFunc(emails, match)
 	}
 
 	assert.True(t, contains(func(s *user_model.SearchEmailResult) bool { return s.UID == 18 }))

models/user/moderation.go

@@ -87,7 +87,7 @@ func newUserData(user *User) UserData {
 // (e.g. FieldName -> field_name) corresponding to UserData struct fields.
 var userDataColumnNames = sync.OnceValue(func() []string {
 	mapper := new(names.GonicMapper)
-	udType := reflect.TypeOf(UserData{})
+	udType := reflect.TypeFor[UserData]()
 	columnNames := make([]string, 0, udType.NumField())
 	for i := 0; i < udType.NumField(); i++ {
 		columnNames = append(columnNames, mapper.Obj2Table(udType.Field(i).Name))

models/user/user.go

@@ -1243,8 +1243,8 @@ func GetUserByEmail(ctx context.Context, email string) (*User, error) {
 	}
 
 	// Finally, if email address is the protected email address:
-	if strings.HasSuffix(email, fmt.Sprintf("@%s", setting.Service.NoReplyAddress)) {
-		username := strings.TrimSuffix(email, fmt.Sprintf("@%s", setting.Service.NoReplyAddress))
+	if before, ok := strings.CutSuffix(email, fmt.Sprintf("@%s", setting.Service.NoReplyAddress)); ok {
+		username := before
 		user := &User{}
 		has, err := db.GetEngine(ctx).Where("lower_name=?", username).Get(user)
 		if err != nil {

models/user/user_test.go

@@ -273,9 +273,9 @@ func TestHashPasswordDeterministic(t *testing.T) {
 	b := make([]byte, 16)
 	u := &user_model.User{}
 	algos := hash.RecommendedHashAlgorithms
-	for j := 0; j < len(algos); j++ {
+	for j := range algos {
 		u.PasswdHashAlgo = algos[j]
-		for i := 0; i < 50; i++ {
+		for range 50 {
 			// generate a random password
 			rand.Read(b)
 			pass := string(b)

models/webhook/webhook.go

@@ -429,7 +429,7 @@ func CreateWebhooks(ctx context.Context, ws []*Webhook) error {
 	if len(ws) == 0 {
 		return nil
 	}
-	for i := 0; i < len(ws); i++ {
+	for i := range ws {
 		ws[i].Type = strings.TrimSpace(ws[i].Type)
 	}
 	return db.Insert(ctx, ws)

modules/actions/workflows.go

@@ -7,6 +7,7 @@ import (
 	"bytes"
 	"fmt"
 	"io"
+	"slices"
 	"strings"
 
 	actions_model "forgejo.org/models/actions"
@@ -609,11 +610,8 @@ func matchPullRequestReviewEvent(prPayload *api.PullRequestPayload, evt *jobpars
 
 			matched := false
 			for _, val := range vals {
-				for _, action := range actions {
-					if glob.MustCompile(val, '/').Match(action) {
-						matched = true
-						break
-					}
+				if slices.ContainsFunc(actions, glob.MustCompile(val, '/').Match) {
+					matched = true
 				}
 				if matched {
 					break
@@ -658,11 +656,8 @@ func matchPullRequestReviewCommentEvent(prPayload *api.PullRequestPayload, evt *
 
 			matched := false
 			for _, val := range vals {
-				for _, action := range actions {
-					if glob.MustCompile(val, '/').Match(action) {
-						matched = true
-						break
-					}
+				if slices.ContainsFunc(actions, glob.MustCompile(val, '/').Match) {
+					matched = true
 				}
 				if matched {
 					break

modules/auth/password/password.go

@@ -101,7 +101,7 @@ func Generate(n int) (string, error) {
 	buffer := make([]byte, n)
 	max := big.NewInt(int64(len(validChars)))
 	for {
-		for j := 0; j < n; j++ {
+		for j := range n {
 			rnd, err := rand.Int(rand.Reader, max)
 			if err != nil {
 				return "", err

modules/auth/password/password_test.go

@@ -51,7 +51,7 @@ func TestComplexity_Generate(t *testing.T) {
 
 	test := func(t *testing.T, modes []string) {
 		testComplextity(modes)
-		for i := 0; i < maxCount; i++ {
+		for range maxCount {
 			pwd, err := Generate(pwdLen)
 			require.NoError(t, err)
 			assert.Len(t, pwd, pwdLen)

modules/auth/password/pwn/pwn.go

@@ -101,7 +101,7 @@ func (c *Client) CheckPassword(pw string, padding bool) (int, error) {
 	}
 	defer resp.Body.Close()
 
-	for _, pair := range strings.Split(string(body), "\n") {
+	for pair := range strings.SplitSeq(string(body), "\n") {
 		parts := strings.Split(pair, ":")
 		if len(parts) != 2 {
 			continue

modules/avatar/identicon/block.go

@@ -24,8 +24,8 @@ func drawBlock(img *image.Paletted, x, y, size, angle int, points []int) {
 		rotate(points, m, m, angle)
 	}
 
-	for i := 0; i < size; i++ {
-		for j := 0; j < size; j++ {
+	for i := range size {
+		for j := range size {
 			if pointInPolygon(i, j, points) {
 				img.SetColorIndex(x+i, y+j, 1)
 			}

modules/avatar/identicon/identicon.go

@@ -134,7 +134,7 @@ func drawBlocks(p *image.Paletted, size int, c, b1, b2 blockFunc, b1Angle, b2Ang
 
 	// then we make it left-right mirror, so we didn't draw 3/6/9 before
 	for x := 0; x < size/2; x++ {
-		for y := 0; y < size; y++ {
+		for y := range size {
 			p.SetColorIndex(size-x, y, p.ColorIndexAt(x, y))
 		}
 	}

modules/charset/charset.go

@@ -164,7 +164,7 @@ func DetectEncoding(content []byte) (string, error) {
 		}
 		times := 1024 / len(content)
 		detectContent = make([]byte, 0, times*len(content))
-		for i := 0; i < times; i++ {
+		for range times {
 			detectContent = append(detectContent, content...)
 		}
 	} else {

modules/charset/charset_test.go

@@ -243,7 +243,7 @@ func stringMustEndWith(t *testing.T, expected, value string) {
 func TestToUTF8WithFallbackReader(t *testing.T) {
 	resetDefaultCharsetsOrder()
 
-	for testLen := 0; testLen < 2048; testLen++ {
+	for testLen := range 2048 {
 		pattern := "    test { () }\n"
 		input := ""
 		for len(input) < testLen {

modules/forgefed/actor.go

@@ -6,6 +6,7 @@ package forgefed
 import (
 	"fmt"
 	"net/url"
+	"slices"
 	"strconv"
 	"strings"
 
@@ -107,12 +108,7 @@ func newActorID(uri string) (ActorID, error) {
 }
 
 func containsEmptyString(ar []string) bool {
-	for _, elem := range ar {
-		if elem == "" {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(ar, "")
 }
 
 func removeEmptyStrings(ls []string) []string {

modules/forgefed/repository.go

@@ -88,7 +88,7 @@ func ToRepository(it ap.Item) (*Repository, error) {
 		return (*Repository)(unsafe.Pointer(&i)), nil
 	default:
 		// NOTE(marius): this is an ugly way of dealing with the interface conversion error: types from different scopes
-		typ := reflect.TypeOf(new(Repository))
+		typ := reflect.TypeFor[*Repository]()
 		if i, ok := reflect.ValueOf(it).Convert(typ).Interface().(*Repository); ok {
 			return i, nil
 		}

modules/git/commit.go

@@ -269,8 +269,8 @@ func NewSearchCommitsOptions(searchString string, forAllRefs bool) SearchCommits
 	var keywords, authors, committers []string
 	var after, before string
 
-	fields := strings.Fields(searchString)
-	for _, k := range fields {
+	fields := strings.FieldsSeq(searchString)
+	for k := range fields {
 		switch {
 		case strings.HasPrefix(k, "author:"):
 			authors = append(authors, strings.TrimPrefix(k, "author:"))

modules/git/commit_info.go

@@ -7,6 +7,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"maps"
 	"path"
 	"sort"
 
@@ -45,9 +46,7 @@ func (tes Entries) GetCommitsInfo(ctx context.Context, commit *Commit, treePath
 				return nil, nil, err
 			}
 
-			for pth, found := range commits {
-				revs[pth] = found
-			}
+			maps.Copy(revs, commits)
 		}
 	} else {
 		sort.Strings(entryPaths)

modules/git/foreachref/format.go

@@ -75,9 +75,9 @@ func (f Format) Parser(r io.Reader) *Parser {
 // hexEscaped produces hex-escaped characters from a string. For example, "\n\0"
 // would turn into "%0a%00".
 func (f Format) hexEscaped(delim []byte) string {
-	escaped := ""
-	for i := 0; i < len(delim); i++ {
-		escaped += "%" + hex.EncodeToString([]byte{delim[i]})
+	var escaped strings.Builder
+	for i := range delim {
+		escaped.WriteString("%" + hex.EncodeToString([]byte{delim[i]}))
 	}
-	return escaped
+	return escaped.String()
 }

modules/git/hook.go

@@ -9,6 +9,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"slices"
 	"strings"
 
 	"forgejo.org/modules/log"
@@ -27,12 +28,7 @@ var ErrNotValidHook = errors.New("not a valid Git hook")
 
 // IsValidHookName returns true if given name is a valid Git hook.
 func IsValidHookName(name string) bool {
-	for _, hn := range hookNames {
-		if hn == name {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(hookNames, name)
 }
 
 // Hook represents a Git hook.

modules/git/last_commit_cache.go

@@ -21,7 +21,7 @@ type Cache interface {
 }
 
 func getCacheKey(repoPath, commitID, entryPath string) string {
-	hashBytes := sha256.Sum256([]byte(fmt.Sprintf("%s:%s:%s", repoPath, commitID, entryPath)))
+	hashBytes := sha256.Sum256(fmt.Appendf(nil, "%s:%s:%s", repoPath, commitID, entryPath))
 	return fmt.Sprintf("last_commit:%x", hashBytes)
 }
 

modules/git/log_name_status.go

@@ -346,10 +346,7 @@ func WalkGitLog(ctx context.Context, repo *Repository, head *Commit, treepath st
 
 	results := make([]string, len(paths))
 	remaining := len(paths)
-	nextRestart := (len(paths) * 3) / 4
-	if nextRestart > 70 {
-		nextRestart = 70
-	}
+	nextRestart := min((len(paths)*3)/4, 70)
 	lastEmptyParent := head.ID.String()
 	commitSinceLastEmptyParent := uint64(0)
 	commitSinceNextRestart := uint64(0)

modules/git/notes.go

@@ -8,6 +8,7 @@ import (
 	"context"
 	"io"
 	"os"
+	"strings"
 
 	"forgejo.org/modules/log"
 )
@@ -33,7 +34,7 @@ func GetNote(ctx context.Context, repo *Repository, commitID string) (*Note, err
 		return nil, err
 	}
 
-	path := ""
+	var path strings.Builder
 
 	tree := &notes.Tree
 	log.Trace("Found tree with ID %q while searching for git note corresponding to the commit %q", tree.ID, commitID)
@@ -43,12 +44,12 @@ func GetNote(ctx context.Context, repo *Repository, commitID string) (*Note, err
 	for len(commitID) > 2 {
 		entry, err = tree.GetTreeEntryByPath(commitID)
 		if err == nil {
-			path += commitID
+			path.WriteString(commitID)
 			break
 		}
 		if IsErrNotExist(err) {
 			tree, err = tree.SubTree(commitID[0:2])
-			path += commitID[0:2] + "/"
+			path.WriteString(commitID[0:2] + "/")
 			commitID = commitID[2:]
 		}
 		if err != nil {
@@ -80,9 +81,9 @@ func GetNote(ctx context.Context, repo *Repository, commitID string) (*Note, err
 	_ = dataRc.Close()
 	closed = true
 
-	lastCommit, err := repo.getCommitByPathWithID(notes.ID, path)
+	lastCommit, err := repo.getCommitByPathWithID(notes.ID, path.String())
 	if err != nil {
-		log.Error("Unable to get the commit for the path %q. Error: %v", path, err)
+		log.Error("Unable to get the commit for the path %q. Error: %v", path.String(), err)
 		return nil, err
 	}
 

modules/git/parse.go

@@ -33,16 +33,16 @@ func parseTreeEntries(data []byte, ptree *Tree) ([]*TreeEntry, error) {
 			posEnd += pos
 		}
 		line := data[pos:posEnd]
-		posTab := bytes.IndexByte(line, '\t')
-		if posTab == -1 {
+		before, after, ok := bytes.Cut(line, []byte{'\t'})
+		if !ok {
 			return nil, fmt.Errorf("invalid ls-tree output (no tab): %q", line)
 		}
 
 		entry := new(TreeEntry)
 		entry.ptree = ptree
 
-		entryAttrs := line[:posTab]
-		entryName := line[posTab+1:]
+		entryAttrs := before
+		entryName := after
 
 		entryMode, entryAttrs, _ := bytes.Cut(entryAttrs, sepSpace)
 		_ /* entryType */, entryAttrs, _ = bytes.Cut(entryAttrs, sepSpace) // the type is not used, the mode is enough to determine the type

modules/git/pushoptions/pushoptions.go

@@ -52,7 +52,7 @@ func NewFromMap(o *map[string]string) Interface {
 
 func (o *gitPushOptions) ReadEnv() Interface {
 	if pushCount, err := strconv.Atoi(os.Getenv(EnvCount)); err == nil {
-		for idx := 0; idx < pushCount; idx++ {
+		for idx := range pushCount {
 			_ = o.Parse(os.Getenv(fmt.Sprintf(EnvFormat, idx)))
 		}
 	}

modules/git/ref.go

@@ -105,8 +105,8 @@ func (ref RefName) IsFor() bool {
 }
 
 func (ref RefName) nameWithoutPrefix(prefix string) string {
-	if strings.HasPrefix(string(ref), prefix) {
-		return strings.TrimPrefix(string(ref), prefix)
+	if after, ok := strings.CutPrefix(string(ref), prefix); ok {
+		return after
 	}
 	return ""
 }

modules/git/repo.go

@@ -46,9 +46,9 @@ func (repo *Repository) parsePrettyFormatLogToList(logs []byte) ([]*Commit, erro
 		return commits, nil
 	}
 
-	parts := bytes.Split(logs, []byte{'\n'})
+	parts := bytes.SplitSeq(logs, []byte{'\n'})
 
-	for _, commitID := range parts {
+	for commitID := range parts {
 		commit, err := repo.GetCommit(string(commitID))
 		if err != nil {
 			return nil, err

modules/git/repo_attribute.go

@@ -96,8 +96,8 @@ func (ca GitAttribute) String() string {
 // sometimes used within gitlab-language: https://docs.gitlab.com/ee/user/project/highlighting.html#override-syntax-highlighting-for-a-file-type
 func (ca GitAttribute) Prefix() string {
 	s := ca.String()
-	if i := strings.IndexByte(s, '?'); i >= 0 {
-		return s[:i]
+	if before, _, ok := strings.Cut(s, "?"); ok {
+		return before
 	}
 	return s
 }

modules/git/repo_index.go

@@ -95,7 +95,7 @@ func (repo *Repository) LsFiles(filenames ...string) ([]string, error) {
 		return nil, err
 	}
 	filelist := make([]string, 0, len(filenames))
-	for _, line := range bytes.Split(res, []byte{'\000'}) {
+	for line := range bytes.SplitSeq(res, []byte{'\000'}) {
 		filelist = append(filelist, string(line))
 	}
 

modules/git/repo_tag.go

@@ -42,8 +42,8 @@ func (repo *Repository) GetTagNameBySHA(sha string) (string, error) {
 		return "", err
 	}
 
-	tagRefs := strings.Split(stdout, "\n")
-	for _, tagRef := range tagRefs {
+	tagRefs := strings.SplitSeq(stdout, "\n")
+	for tagRef := range tagRefs {
 		if len(strings.TrimSpace(tagRef)) > 0 {
 			fields := strings.Fields(tagRef)
 			if strings.HasPrefix(fields[0], sha) && strings.HasPrefix(fields[1], TagPrefix) {
@@ -65,7 +65,7 @@ func (repo *Repository) GetTagID(name string) (string, error) {
 		return "", err
 	}
 	// Make sure exact match is used: "v1" != "release/v1"
-	for _, line := range strings.Split(stdout, "\n") {
+	for line := range strings.SplitSeq(stdout, "\n") {
 		fields := strings.Fields(line)
 		if len(fields) == 2 && fields[1] == "refs/tags/"+name {
 			return fields[0], nil

modules/git/tag.go

@@ -50,20 +50,20 @@ l:
 		switch {
 		case eol > 0:
 			line := data[nextline : nextline+eol]
-			spacepos := bytes.IndexByte(line, ' ')
-			reftype := line[:spacepos]
+			before, after, _ := bytes.Cut(line, []byte{' '})
+			reftype := before
 			switch string(reftype) {
 			case "object":
-				id, err := NewIDFromString(string(line[spacepos+1:]))
+				id, err := NewIDFromString(string(after))
 				if err != nil {
 					return nil, err
 				}
 				tag.Object = id
 			case "type":
 				// A commit can have one or more parents
-				tag.Type = string(line[spacepos+1:])
+				tag.Type = string(after)
 			case "tagger":
-				tag.Tagger = parseSignatureFromCommitLine(util.UnsafeBytesToString(line[spacepos+1:]))
+				tag.Tagger = parseSignatureFromCommitLine(util.UnsafeBytesToString(after))
 			}
 			nextline += eol + 1
 		case eol == 0:

modules/git/tree.go

@@ -170,7 +170,7 @@ func (repo *Repository) LsTree(ref string, filenames ...string) ([]string, error
 		return nil, err
 	}
 	filelist := make([]string, 0, len(filenames))
-	for _, line := range bytes.Split(res, []byte{'\000'}) {
+	for line := range bytes.SplitSeq(res, []byte{'\000'}) {
 		filelist = append(filelist, string(line))
 	}
 

modules/git/tree_entry.go

@@ -171,7 +171,7 @@ func (te *TreeEntry) FollowLinks() (*TreeEntry, string, error) {
 	}
 	entry := te
 	entryLink := ""
-	for i := 0; i < 999; i++ {
+	for range 999 {
 		if entry.IsLink() {
 			next, link, err := entry.FollowLink()
 			entryLink = link

modules/git/tree_test.go

@@ -20,7 +20,7 @@ func TestSubTree_Issue29101(t *testing.T) {
 	require.NoError(t, err)
 
 	// old code could produce a different error if called multiple times
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		_, err = commit.SubTree("file1.txt")
 		require.Error(t, err)
 		assert.True(t, IsErrNotExist(err))

modules/hostmatcher/hostmatcher.go

@@ -6,6 +6,7 @@ package hostmatcher
 import (
 	"net"
 	"path/filepath"
+	"slices"
 	"strings"
 )
 
@@ -38,7 +39,7 @@ func isBuiltin(s string) bool {
 // ParseHostMatchList parses the host list HostMatchList
 func ParseHostMatchList(settingKeyHint, hostList string) *HostMatchList {
 	hl := &HostMatchList{SettingKeyHint: settingKeyHint, SettingValue: hostList}
-	for _, s := range strings.Split(hostList, ",") {
+	for s := range strings.SplitSeq(hostList, ",") {
 		s = strings.ToLower(strings.TrimSpace(s))
 		if s == "" {
 			continue
@@ -61,7 +62,7 @@ func ParseSimpleMatchList(settingKeyHint, matchList string) *HostMatchList {
 		SettingKeyHint: settingKeyHint,
 		SettingValue:   matchList,
 	}
-	for _, s := range strings.Split(matchList, ",") {
+	for s := range strings.SplitSeq(matchList, ",") {
 		s = strings.ToLower(strings.TrimSpace(s))
 		if s == "" {
 			continue
@@ -98,10 +99,8 @@ func (hl *HostMatchList) checkPattern(host string) bool {
 }
 
 func (hl *HostMatchList) checkIP(ip net.IP) bool {
-	for _, pattern := range hl.patterns {
-		if pattern == "*" {
-			return true
-		}
+	if slices.Contains(hl.patterns, "*") {
+		return true
 	}
 	for _, builtin := range hl.builtins {
 		switch builtin {

modules/httpcache/httpcache.go

@@ -59,7 +59,7 @@ func HandleGenericETagCache(req *http.Request, w http.ResponseWriter, etag strin
 func checkIfNoneMatchIsValid(req *http.Request, etag string) bool {
 	ifNoneMatch := req.Header.Get("If-None-Match")
 	if len(ifNoneMatch) > 0 {
-		for _, item := range strings.Split(ifNoneMatch, ",") {
+		for item := range strings.SplitSeq(ifNoneMatch, ",") {
 			item = strings.TrimPrefix(strings.TrimSpace(item), "W/") // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ETag#directives
 			if item == etag {
 				return true

modules/httplib/serve.go

@@ -8,6 +8,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"maps"
 	"net/http"
 	"net/url"
 	"path"
@@ -86,9 +87,7 @@ func ServeSetHeaders(w http.ResponseWriter, opts *ServeHeaderOptions) {
 	}
 
 	if opts.AdditionalHeaders != nil {
-		for k, v := range opts.AdditionalHeaders {
-			header[k] = v
-		}
+		maps.Copy(header, opts.AdditionalHeaders)
 	}
 }
 

modules/indexer/code/git.go

@@ -129,8 +129,8 @@ func nonGenesisChanges(ctx context.Context, repo *repo_model.Repository, revisio
 		changes.Updates = append(changes.Updates, updates...)
 		return nil
 	}
-	lines := strings.Split(stdout, "\n")
-	for _, line := range lines {
+	lines := strings.SplitSeq(stdout, "\n")
+	for line := range lines {
 		line = strings.TrimSpace(line)
 		if len(line) == 0 {
 			continue

modules/issue/template/template.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"net/url"
 	"regexp"
+	"slices"
 	"strconv"
 	"strings"
 
@@ -447,12 +448,7 @@ func (o *valuedOption) IsChecked() bool {
 	case api.IssueFormFieldTypeDropdown:
 		checks := strings.Split(o.field.Get(fmt.Sprintf("form-field-%s", o.field.ID)), ",")
 		idx := strconv.Itoa(o.index)
-		for _, v := range checks {
-			if v == idx {
-				return true
-			}
-		}
-		return false
+		return slices.Contains(checks, idx)
 	case api.IssueFormFieldTypeCheckboxes:
 		return o.field.Get(fmt.Sprintf("form-field-%s-%d", o.field.ID, o.index)) == "on"
 	}

modules/label/parser.go

@@ -72,7 +72,7 @@ func parseYamlFormat(fileName string, data []byte) ([]*Label, error) {
 func parseLegacyFormat(fileName string, data []byte) ([]*Label, error) {
 	lines := strings.Split(string(data), "\n")
 	list := make([]*Label, 0, len(lines))
-	for i := 0; i < len(lines); i++ {
+	for i := range lines {
 		line := strings.TrimSpace(lines[i])
 		if len(line) == 0 {
 			continue
@@ -108,7 +108,7 @@ func LoadTemplateDescription(fileName string) (string, error) {
 		return "", err
 	}
 
-	for i := 0; i < len(list); i++ {
+	for i := range list {
 		if i > 0 {
 			buf.WriteString(", ")
 		}

modules/log/event_format.go

@@ -208,7 +208,7 @@ func EventFormatTextMessage(mode *WriterMode, event *Event, msgFormat string, ms
 			}
 		}
 		if hasColorValue {
-			msg = []byte(fmt.Sprintf(msgFormat, msgArgs...))
+			msg = fmt.Appendf(nil, msgFormat, msgArgs...)
 		}
 	}
 	// try to reuse the pre-formatted simple text message
@@ -227,8 +227,8 @@ func EventFormatTextMessage(mode *WriterMode, event *Event, msgFormat string, ms
 	buf = append(buf, msg...)
 
 	if event.Stacktrace != "" && mode.StacktraceLevel <= event.Level {
-		lines := bytes.Split([]byte(event.Stacktrace), []byte("\n"))
-		for _, line := range lines {
+		lines := bytes.SplitSeq([]byte(event.Stacktrace), []byte("\n"))
+		for line := range lines {
 			buf = append(buf, "\n\t"...)
 			buf = append(buf, line...)
 		}

modules/log/event_writer_conn_test.go

@@ -63,11 +63,9 @@ func TestConnLogger(t *testing.T) {
 	}
 	expected := fmt.Sprintf("%s%s %s:%d:%s [%c] %s\n", prefix, dateString, event.Filename, event.Line, event.Caller, strings.ToUpper(event.Level.String())[0], event.MsgSimpleText)
 	var wg sync.WaitGroup
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
+	wg.Go(func() {
 		listenReadAndClose(t, l, expected)
-	}()
+	})
 	logger.SendLogEvent(&event)
 	wg.Wait()
 

modules/log/flags.go

@@ -124,7 +124,7 @@ func FlagsFromString(from string, def ...uint32) Flags {
 		return Flags{defined: true, flags: def[0]}
 	}
 	flags := uint32(0)
-	for _, flag := range strings.Split(strings.ToLower(from), ",") {
+	for flag := range strings.SplitSeq(strings.ToLower(from), ",") {
 		flags |= flagFromString[strings.TrimSpace(flag)]
 	}
 	return Flags{defined: true, flags: flags}

modules/log/level_test.go

@@ -33,11 +33,11 @@ func TestLevelMarshalUnmarshalJSON(t *testing.T) {
 	require.NoError(t, err)
 	assert.Equal(t, INFO, testLevel.Level)
 
-	err = json.Unmarshal([]byte(fmt.Sprintf(`{"level":%d}`, 2)), &testLevel)
+	err = json.Unmarshal(fmt.Appendf(nil, `{"level":%d}`, 2), &testLevel)
 	require.NoError(t, err)
 	assert.Equal(t, INFO, testLevel.Level)
 
-	err = json.Unmarshal([]byte(fmt.Sprintf(`{"level":%d}`, 10012)), &testLevel)
+	err = json.Unmarshal(fmt.Appendf(nil, `{"level":%d}`, 10012), &testLevel)
 	require.NoError(t, err)
 	assert.Equal(t, INFO, testLevel.Level)
 
@@ -52,5 +52,5 @@ func TestLevelMarshalUnmarshalJSON(t *testing.T) {
 }
 
 func makeTestLevelBytes(level string) []byte {
-	return []byte(fmt.Sprintf(`{"level":"%s"}`, level))
+	return fmt.Appendf(nil, `{"level":"%s"}`, level)
 }

modules/markup/file_preview.go

@@ -80,8 +80,8 @@ func newFilePreview(ctx *RenderContext, node *html.Node, locale translation.Loca
 	filePath := node.Data[m[6]:m[7]]
 	hash := node.Data[m[8]:m[9]]
 	urlFullSource := urlFull
-	if strings.HasSuffix(filePath, "?display=source") {
-		filePath = strings.TrimSuffix(filePath, "?display=source")
+	if before, ok := strings.CutSuffix(filePath, "?display=source"); ok {
+		filePath = before
 	} else if Type(filePath) != "" {
 		urlFullSource = node.Data[m[0]:m[6]] + filePath + "?display=source#" + hash
 	}

modules/markup/html.go

@@ -11,6 +11,7 @@ import (
 	"path"
 	"path/filepath"
 	"regexp"
+	"slices"
 	"strings"
 	"sync"
 
@@ -124,13 +125,7 @@ func CustomLinkURLSchemes(schemes []string) {
 		if !validScheme.MatchString(s) {
 			continue
 		}
-		without := false
-		for _, sna := range xurls.SchemesNoAuthority {
-			if s == sna {
-				without = true
-				break
-			}
-		}
+		without := slices.Contains(xurls.SchemesNoAuthority, s)
 		if without {
 			s += ":"
 		} else {
@@ -675,9 +670,9 @@ func shortLinkProcessor(ctx *RenderContext, node *html.Node) {
 		// It makes page handling terrible, but we prefer GitHub syntax
 		// And fall back to MediaWiki only when it is obvious from the look
 		// Of text and link contents
-		sl := strings.Split(content, "|")
-		for _, v := range sl {
-			if equalPos := strings.IndexByte(v, '='); equalPos == -1 {
+		sl := strings.SplitSeq(content, "|")
+		for v := range sl {
+			if found := strings.Contains(v, "="); !found {
 				// There is no equal in this argument; this is a mandatory arg
 				if props["name"] == "" {
 					if IsLinkStr(v) {
@@ -699,8 +694,8 @@ func shortLinkProcessor(ctx *RenderContext, node *html.Node) {
 			} else {
 				// There is an equal; optional argument.
 
-				sep := strings.IndexByte(v, '=')
-				key, val := v[:sep], html.UnescapeString(v[sep+1:])
+				before, after, _ := strings.Cut(v, "=")
+				key, val := before, html.UnescapeString(after)
 
 				// When parsing HTML, x/net/html will change all quotes which are
 				// not used for syntax into UTF-8 quotes. So checking val[0] won't
@@ -1148,7 +1143,7 @@ func comparePatternProcessor(ctx *RenderContext, node *html.Node) {
 		}
 
 		// Ensure that every group (m[0]...m[9]) has a match
-		for i := 0; i < 10; i++ {
+		for i := range 10 {
 			if m[i] == -1 {
 				return
 			}

modules/markup/markdown/markdown.go

@@ -182,10 +182,7 @@ func actualRender(ctx *markup.RenderContext, input io.Reader, output io.Writer)
 	}
 	buf, _ = ExtractMetadataBytes(buf, rc)
 
-	metaLength := bufWithMetadataLength - len(buf)
-	if metaLength < 0 {
-		metaLength = 0
-	}
+	metaLength := max(bufWithMetadataLength-len(buf), 0)
 	rc.metaLength = metaLength
 
 	pc.Set(markdownutil.RenderConfigKey, rc)

modules/markup/markdown/markdown_test.go

@@ -319,7 +319,7 @@ func TestTotal_RenderWiki(t *testing.T) {
 
 	answers := testAnswers(util.URLJoin(FullURL, "wiki"), util.URLJoin(FullURL, "wiki", "raw"))
 
-	for i := 0; i < len(sameCases); i++ {
+	for i := range sameCases {
 		line, err := markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
 			Links: markup.Links{
@@ -363,7 +363,7 @@ func TestTotal_RenderString(t *testing.T) {
 
 	answers := testAnswers(util.URLJoin(FullURL, "src", "master"), util.URLJoin(FullURL, "media", "master"))
 
-	for i := 0; i < len(sameCases); i++ {
+	for i := range sameCases {
 		line, err := markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
 			Links: markup.Links{

modules/markup/markdown/math/block_renderer.go

@@ -24,7 +24,7 @@ func (r *BlockRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
 
 func (r *BlockRenderer) writeLines(w util.BufWriter, source []byte, n gast.Node) {
 	l := n.Lines().Len()
-	for i := 0; i < l; i++ {
+	for i := range l {
 		line := n.Lines().At(i)
 		_, _ = w.Write(util.EscapeHTML(line.Value(source)))
 	}

modules/markup/markdown/meta_test.go

@@ -63,7 +63,7 @@ func TestExtractMetadata(t *testing.T) {
 func TestExtractMetadataBytes(t *testing.T) {
 	t.Run("ValidFrontAndBody", func(t *testing.T) {
 		var meta IssueTemplate
-		body, err := ExtractMetadataBytes([]byte(fmt.Sprintf("%s\n%s\n%s\n%s", sepTest, frontTest, sepTest, bodyTest)), &meta)
+		body, err := ExtractMetadataBytes(fmt.Appendf(nil, "%s\n%s\n%s\n%s", sepTest, frontTest, sepTest, bodyTest), &meta)
 		require.NoError(t, err)
 		assert.Equal(t, bodyTest, string(body))
 		assert.Equal(t, metaTest, meta)
@@ -72,19 +72,19 @@ func TestExtractMetadataBytes(t *testing.T) {
 
 	t.Run("NoFirstSeparator", func(t *testing.T) {
 		var meta IssueTemplate
-		_, err := ExtractMetadataBytes([]byte(fmt.Sprintf("%s\n%s\n%s", frontTest, sepTest, bodyTest)), &meta)
+		_, err := ExtractMetadataBytes(fmt.Appendf(nil, "%s\n%s\n%s", frontTest, sepTest, bodyTest), &meta)
 		require.Error(t, err)
 	})
 
 	t.Run("NoLastSeparator", func(t *testing.T) {
 		var meta IssueTemplate
-		_, err := ExtractMetadataBytes([]byte(fmt.Sprintf("%s\n%s\n%s", sepTest, frontTest, bodyTest)), &meta)
+		_, err := ExtractMetadataBytes(fmt.Appendf(nil, "%s\n%s\n%s", sepTest, frontTest, bodyTest), &meta)
 		require.Error(t, err)
 	})
 
 	t.Run("NoBody", func(t *testing.T) {
 		var meta IssueTemplate
-		body, err := ExtractMetadataBytes([]byte(fmt.Sprintf("%s\n%s\n%s", sepTest, frontTest, sepTest)), &meta)
+		body, err := ExtractMetadataBytes(fmt.Appendf(nil, "%s\n%s\n%s", sepTest, frontTest, sepTest), &meta)
 		require.NoError(t, err)
 		assert.Empty(t, string(body))
 		assert.Equal(t, metaTest, meta)

modules/markup/markdown/toc.go

@@ -44,7 +44,7 @@ func createTOCNode(toc []markup.Header, lang string, detailsAttrs map[string]str
 		}
 		li := ast.NewListItem(currentLevel * 2)
 		a := ast.NewLink()
-		a.Destination = []byte(fmt.Sprintf("#%s", url.QueryEscape(header.ID)))
+		a.Destination = fmt.Appendf(nil, "#%s", url.QueryEscape(header.ID))
 		a.AppendChild(a, ast.NewString([]byte(header.Text)))
 		li.AppendChild(li, a)
 		ul.AppendChild(ul, li)

modules/markup/markdown/transform_heading.go

@@ -17,7 +17,7 @@ import (
 func (g *ASTTransformer) transformHeading(_ *markup.RenderContext, v *ast.Heading, reader text.Reader, tocList *[]markup.Header) {
 	for _, attr := range v.Attributes() {
 		if _, ok := attr.Value.([]byte); !ok {
-			v.SetAttribute(attr.Name, []byte(fmt.Sprintf("%v", attr.Value)))
+			v.SetAttribute(attr.Name, fmt.Appendf(nil, "%v", attr.Value))
 		}
 	}
 	txt := mdutil.Text(v, reader.Source())

modules/markup/renderer.go

@@ -319,23 +319,19 @@ func render(ctx *RenderContext, renderer Renderer, input io.Reader, output io.Wr
 			_ = pw2.Close()
 		}()
 
-		wg.Add(1)
-		go func() {
+		wg.Go(func() {
 			err = donotpanic.SafeFuncWithError(func() error { return SanitizeReader(pr2, renderer.Name(), output) })
 			_ = pr2.Close()
-			wg.Done()
-		}()
+		})
 	} else {
 		pw2 = nopCloser{output}
 	}
 
-	wg.Add(1)
-	go func() {
+	wg.Go(func() {
 		err = donotpanic.SafeFuncWithError(func() error { return postProcessOrCopy(ctx, renderer, pr, pw2) })
 		_ = pr.Close()
 		_ = pw2.Close()
-		wg.Done()
-	}()
+	})
 
 	if err1 := renderer.Render(ctx, input, pw); err1 != nil {
 		return err1

modules/packages/npm/creator.go

@@ -58,7 +58,7 @@ type PackageMetadata struct {
 	Time           map[string]time.Time               `json:"time,omitempty"`
 	Homepage       string                             `json:"homepage,omitempty"`
 	Keywords       []string                           `json:"keywords,omitempty"`
-	Repository     Repository                         `json:"repository,omitempty"`
+	Repository     Repository                         `json:"repository"`
 	Author         User                               `json:"author"`
 	ReadmeFilename string                             `json:"readmeFilename,omitempty"`
 	Users          map[string]bool                    `json:"users,omitempty"`
@@ -75,7 +75,7 @@ type PackageMetadataVersion struct {
 	Author               User                `json:"author"`
 	Homepage             string              `json:"homepage,omitempty"`
 	License              string              `json:"license,omitempty"`
-	Repository           Repository          `json:"repository,omitempty"`
+	Repository           Repository          `json:"repository"`
 	Keywords             []string            `json:"keywords,omitempty"`
 	Dependencies         map[string]string   `json:"dependencies,omitempty"`
 	BundleDependencies   []string            `json:"bundleDependencies,omitempty"`

modules/packages/npm/metadata.go

@@ -22,5 +22,5 @@ type Metadata struct {
 	OptionalDependencies    map[string]string `json:"optional_dependencies,omitempty"`
 	Bin                     map[string]string `json:"bin,omitempty"`
 	Readme                  string            `json:"readme,omitempty"`
-	Repository              Repository        `json:"repository,omitempty"`
+	Repository              Repository        `json:"repository"`
 }

modules/packages/nuget/symbol_extractor.go

@@ -142,8 +142,8 @@ func ParseDebugHeaderID(r io.ReadSeeker) (string, error) {
 			if _, err := r.Read(b); err != nil {
 				return "", err
 			}
-			if i := bytes.IndexByte(b, 0); i != -1 {
-				buf.Write(b[:i])
+			if before, _, ok := bytes.Cut(b, []byte{0}); ok {
+				buf.Write(before)
 				return buf.String(), nil
 			}
 			buf.Write(b)

modules/packages/rubygems/marshal.go

@@ -91,7 +91,7 @@ func (e *MarshalEncoder) marshal(v any) error {
 	val := reflect.ValueOf(v)
 	typ := reflect.TypeOf(v)
 
-	if typ.Kind() == reflect.Ptr {
+	if typ.Kind() == reflect.Pointer {
 		val = val.Elem()
 		typ = typ.Elem()
 	}
@@ -250,7 +250,7 @@ func (e *MarshalEncoder) marshalArray(arr reflect.Value) error {
 		return err
 	}
 
-	for i := 0; i < length; i++ {
+	for i := range length {
 		if err := e.marshal(arr.Index(i).Interface()); err != nil {
 			return err
 		}

modules/packages/swift/metadata.go

@@ -47,7 +47,7 @@ type Metadata struct {
 	Keywords      []string             `json:"keywords,omitempty"`
 	RepositoryURL string               `json:"repository_url,omitempty"`
 	License       string               `json:"license,omitempty"`
-	Author        Person               `json:"author,omitempty"`
+	Author        Person               `json:"author"`
 	Manifests     map[string]*Manifest `json:"manifests,omitempty"`
 }
 

modules/private/serv.go

@@ -7,6 +7,7 @@ import (
 	"context"
 	"fmt"
 	"net/url"
+	"strings"
 
 	asymkey_model "forgejo.org/models/asymkey"
 	"forgejo.org/models/perm"
@@ -47,17 +48,18 @@ type ServCommandResults struct {
 
 // ServCommand preps for a serv call
 func ServCommand(ctx context.Context, keyID int64, ownerName, repoName string, mode perm.AccessMode, verbs ...string) (*ServCommandResults, ResponseExtra) {
-	reqURL := setting.LocalURL + fmt.Sprintf("api/internal/serv/command/%d/%s/%s?mode=%d",
+	var reqURL strings.Builder
+	fmt.Fprintf(&reqURL, "%sapi/internal/serv/command/%d/%s/%s?mode=%d",
+		setting.LocalURL,
 		keyID,
 		url.PathEscape(ownerName),
 		url.PathEscape(repoName),
-		mode,
-	)
+		mode)
 	for _, verb := range verbs {
 		if verb != "" {
-			reqURL += fmt.Sprintf("&verb=%s", url.QueryEscape(verb))
+			fmt.Fprintf(&reqURL, "&verb=%s", url.QueryEscape(verb))
 		}
 	}
-	req := newInternalRequest(ctx, reqURL, "GET")
+	req := newInternalRequest(ctx, reqURL.String(), "GET")
 	return requestJSONResp(req, &ServCommandResults{})
 }

modules/public/public.go

@@ -45,7 +45,7 @@ func FileHandlerFunc() http.HandlerFunc {
 func parseAcceptEncoding(val string) container.Set[string] {
 	parts := strings.Split(val, ";")
 	types := make(container.Set[string])
-	for _, v := range strings.Split(parts[0], ",") {
+	for v := range strings.SplitSeq(parts[0], ",") {
 		types.Add(strings.TrimSpace(v))
 	}
 	return types

modules/queue/base_levelqueue_common.go

@@ -83,7 +83,7 @@ func prepareLevelDB(cfg *BaseConfig) (conn string, db *leveldb.DB, err error) {
 		}
 		conn = cfg.ConnStr
 	}
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		if db, err = nosql.GetManager().GetLevelDB(conn); err == nil {
 			break
 		}

modules/queue/base_redis.go

@@ -49,7 +49,7 @@ func newBaseRedisGeneric(cfg *BaseConfig, unique bool, client nosql.RedisClient)
 	}
 
 	var err error
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		err = client.Ping(graceful.GetManager().ShutdownContext()).Err()
 		if err == nil {
 			break