chore: use go fix to enhance codebase (#29)

This pull request modernizes the codebase by adopting Go 1.21+ features, including built-in functions like min and max, standard library iterators such as strings.SplitSeq and strings.FieldsSeq, utility functions like maps.Copy and slices.Contains, and string manipulation helpers like strings.Cut and strings.CutPrefix. Feedback is provided on a test file where the usage of strings.Builder can be further optimized to avoid unnecessary string allocations during concatenation.

`go fix -diff ./...`

commands/core/lookup.go

@@ -1,6 +1,8 @@
 package core
 
 import (
+	"maps"
+	"slices"
 	"strings"
 	"sync"
 
@@ -24,9 +26,7 @@ func GetAliasesCopy() map[string]string {
 	shellAliasesMu.RLock()
 	defer shellAliasesMu.RUnlock()
 	cp := make(map[string]string, len(ShellAliases))
-	for k, v := range ShellAliases {
+	maps.Copy(cp, ShellAliases)
-		cp[k] = v
-	}
 	return cp
 }
 
@@ -123,11 +123,8 @@ func Lookup(input string) []Suggestion {
 		for _, sub := range currentSubs {
 			match := sub.Name == tok
 			if !match {
-				for _, a := range sub.Aliases {
+				if slices.Contains(sub.Aliases, tok) {
-					if a == tok {
+					match = true
-						match = true
-						break
-					}
 				}
 			}
 
@@ -209,8 +206,8 @@ func Lookup(input string) []Suggestion {
 				suggested = "\"" + suggested + "\""
 			}
 
-			// if the suggestion is a full path that includes 
+			// if the suggestion is a full path that includes
-			// words already in the command line (multi-word support), we replace 
+			// words already in the command line (multi-word support), we replace
 			// the entire argument part by using prefix only
 			finalCmd := ""
 			if len(tokens) > depth+1 && strings.HasPrefix(g.Cmd, tokens[depth]) {

commands/fs/zoxide.go

@@ -51,10 +51,7 @@ func ZoxideGenerator() core.GeneratorFunc {
 			home, _ := os.UserHomeDir()
 
 			if fullQuery == "" {
-				limit := 20
+				limit := min(len(dirs), 20)
-				if len(dirs) < limit {
-					limit = len(dirs)
-				}
 				for i := 0; i < limit; i++ {
 					path := dirs[i]
 					display := strings.Replace(path, home, "~", 1)

commands/git/git.go

@@ -34,7 +34,7 @@ func GitCommitGenerator(tokens []string, _ string, _ string) []core.Suggestion {
 	}
 
 	var results []core.Suggestion
-	for _, line := range strings.Split(string(out), "\n") {
+	for line := range strings.SplitSeq(string(out), "\n") {
 		line = strings.TrimSpace(line)
 		if line == "" {
 			continue

commands/ops/docker.go

@@ -22,7 +22,7 @@ func dockerContainerGenerator(tokens []string, _ string, _ string) []core.Sugges
 	}
 
 	var results []core.Suggestion
-	for _, line := range strings.Split(string(out), "\n") {
+	for line := range strings.SplitSeq(string(out), "\n") {
 		line = strings.TrimSpace(line)
 		if line == "" {
 			continue
@@ -45,7 +45,7 @@ func dockerRunningContainerGenerator(tokens []string, _ string, _ string) []core
 	}
 
 	var results []core.Suggestion
-	for _, line := range strings.Split(string(out), "\n") {
+	for line := range strings.SplitSeq(string(out), "\n") {
 		line = strings.TrimSpace(line)
 		if line == "" {
 			continue
@@ -69,7 +69,7 @@ func dockerImageGenerator(tokens []string, _ string, _ string) []core.Suggestion
 
 	seen := make(map[string]bool)
 	var results []core.Suggestion
-	for _, line := range strings.Split(string(out), "\n") {
+	for line := range strings.SplitSeq(string(out), "\n") {
 		line = strings.TrimSpace(line)
 		if line == "" || line == "<none>:<none>" || seen[line] {
 			continue

commands/pkginstaller/pkgmgr.go

@@ -34,7 +34,7 @@ func installedPackageGenerator(pm string) core.GeneratorFunc {
 		}
 
 		var results []core.Suggestion
-		for _, line := range strings.Split(string(out), "\n") {
+		for line := range strings.SplitSeq(string(out), "\n") {
 			line = strings.TrimSpace(line)
 			if line == "" {
 				continue

commands/python/pip.go

@@ -25,7 +25,7 @@ func pipPackageGenerator(tokens []string, _ string, _ string) []core.Suggestion
 	}
 
 	var results []core.Suggestion
-	for _, line := range strings.Split(string(out), "\n") {
+	for line := range strings.SplitSeq(string(out), "\n") {
 		line = strings.TrimSpace(line)
 		if line == "" {
 			continue

commands/runner/justfile.go

@@ -34,10 +34,10 @@ func init() {
 			lastComment := ""
 			for scanner.Scan() {
 				line := strings.TrimSpace(scanner.Text())
-				
+
 				// Handle comments
-				if strings.HasPrefix(line, "#") {
+				if after, ok := strings.CutPrefix(line, "#"); ok {
-					lastComment = strings.TrimSpace(strings.TrimPrefix(line, "#"))
+					lastComment = strings.TrimSpace(after)
 					continue
 				}
 
@@ -55,7 +55,7 @@ func init() {
 					seen[recipe] = true
 
 					cmd := recipe
-					
+
 					desc := "just recipe"
 					if lastComment != "" {
 						desc = lastComment

commands/sys/ps.go

@@ -22,7 +22,7 @@ func processGenerator(tokens []string, _ string, _ string) []core.Suggestion {
 
 	seen := make(map[string]bool)
 	var results []core.Suggestion
-	for _, line := range strings.Split(string(out), "\n") {
+	for line := range strings.SplitSeq(string(out), "\n") {
 		line = strings.TrimSpace(line)
 		if line == "" {
 			continue

integration/history.go

@@ -95,8 +95,8 @@ func SearchHistory(query string, aliases map[string]string) ([]HistResult, error
 					}
 				}
 			} else if shellName == "fish" {
-				if strings.HasPrefix(line, "- cmd: ") {
+				if after, ok := strings.CutPrefix(line, "- cmd: "); ok {
-					cmd = strings.TrimPrefix(line, "- cmd: ")
+					cmd = after
 				} else {
 					continue
 				}
@@ -128,10 +128,7 @@ func SearchHistory(query string, aliases map[string]string) ([]HistResult, error
 
 	if query == "" {
 		var results []HistResult
-		limit := 100
+		limit := min(len(historyCache), 100)
-		if len(historyCache) < limit {
-			limit = len(historyCache)
-		}
 
 		for i := 0; i < limit; i++ {
 			cmd := historyCache[i]
@@ -251,11 +248,11 @@ func SearchHistory(query string, aliases map[string]string) ([]HistResult, error
 		if tI != tJ {
 			return tI < tJ
 		}
-		
+
 		if tI == 4 && results[i].FuzzyScore != results[j].FuzzyScore {
 			return results[i].FuzzyScore > results[j].FuzzyScore
 		}
-		
+
 		return results[i].ID > results[j].ID
 	})
 

integration/overlay.go

@@ -72,10 +72,7 @@ func ComputeCursorCol(data []byte) int {
 							col = 0
 						}
 					case 'G':
-						col = getParam(0, 1) - 1
+						col = max(getParam(0, 1)-1, 0)
-						if col < 0 {
-							col = 0
-						}
 					}
 					i = j + 1
 					continue
@@ -313,7 +310,6 @@ func (o *Overlay) SetHistoryList(items []core.Suggestion, startAtBottom bool) st
 	return ""
 }
 
-
 func fixedWidth(s string, width int) string {
 	if width <= 0 {
 		return ""
@@ -365,10 +361,7 @@ func (o *Overlay) RenderGhostText(buffer string, userNavigated bool) string {
 	}
 
 	ghostWidth := lipgloss.Width(ghostText)
-	padLen := o.LastGhostLen - ghostWidth
+	padLen := max(o.LastGhostLen-ghostWidth, 0)
-	if padLen < 0 {
-		padLen = 0
-	}
 	if o.LastGhostLen > 0 {
 		padLen += 4
 	}
@@ -410,10 +403,7 @@ func renderMatchedTitle(title, typed string, selected bool, w int) string {
 
 	typedRunes := []rune(typed)
 	displayRunes := []rune(display)
-	matchLen := len(typedRunes)
+	matchLen := min(len(typedRunes), len(displayRunes))
-	if matchLen > len(displayRunes) {
-		matchLen = len(displayRunes)
-	}
 	return match.Render(string(displayRunes[:matchLen])) + base.Render(string(displayRunes[matchLen:]))
 }
 
@@ -453,10 +443,7 @@ func (o *Overlay) draw() string {
 
 	s.WriteString("\0337")
 
-	windowSize := maxItems
+	windowSize := min(len(o.Items), maxItems)
-	if len(o.Items) < windowSize {
-		windowSize = len(o.Items)
-	}
 
 	scrolloffUp := 1
 	if windowSize <= 3 {
@@ -598,10 +585,7 @@ func (o *Overlay) draw() string {
 				}
 				tag := boxStyle.Render(" alias ")
 				tw := lipgloss.Width(tag)
-				rem := descW - tw - 1
+				rem := max(descW-tw-1, 0)
-				if rem < 0 {
-					rem = 0
-				}
 				desc = tag + bg.Render(" ") + bg.Foreground(descColor).Render(fixedWidth(it.Desc, rem))
 			case "history":
 				boxStyle := lipgloss.NewStyle().Background(lipgloss.Color("#1a2d36")).Foreground(lipgloss.Color("#61ffca"))
@@ -610,10 +594,7 @@ func (o *Overlay) draw() string {
 				}
 				tag := boxStyle.Render(" history ")
 				tw := lipgloss.Width(tag)
-				rem := descW - tw
+				rem := max(descW-tw, 0)
-				if rem < 0 {
-					rem = 0
-				}
 				desc = tag + bg.Render(strings.Repeat(" ", rem))
 			case "system":
 				boxStyle := lipgloss.NewStyle().Background(lipgloss.Color("#1e1d28")).Foreground(lipgloss.Color("#a277ff"))
@@ -622,10 +603,7 @@ func (o *Overlay) draw() string {
 				}
 				tag := boxStyle.Render(" system ")
 				tw := lipgloss.Width(tag)
-				rem := descW - tw
+				rem := max(descW-tw, 0)
-				if rem < 0 {
-					rem = 0
-				}
 				desc = tag + bg.Render(strings.Repeat(" ", rem))
 			default:
 				desc = bg.Foreground(descColor).Render(fixedWidth(it.Desc, descW))
@@ -698,7 +676,7 @@ func (o *Overlay) Clear() string {
 	s.WriteString("\033[?7l")
 	s.WriteString("\0337")
 
-	for i := 0; i < maxItems+2; i++ {
+	for i := range maxItems + 2 {
 		s.WriteString("\0338")
 		fmt.Fprintf(&s, "\033[%dB", i+1)
 		s.WriteString("\r\033[2K")
@@ -736,7 +714,7 @@ func (o *Overlay) ClearAndDisable() string {
 
 	s.WriteString("\0337")
 
-	for i := 0; i < maxItems+2; i++ {
+	for i := range maxItems + 2 {
 		s.WriteString("\0338")
 		fmt.Fprintf(&s, "\033[%dB", i+1)
 		s.WriteString("\r\033[2K")

integration/shell/adapter.go

@@ -102,8 +102,8 @@ func ScanPosixAliases(files []string) map[string]string {
 
 func ParseAliases(data string) map[string]string {
 	aliases := make(map[string]string)
-	lines := strings.Split(data, "\n")
+	lines := strings.SplitSeq(data, "\n")
-	for _, line := range lines {
+	for line := range lines {
 		line = strings.TrimSpace(line)
 		if !strings.HasPrefix(line, "alias ") {
 			continue
@@ -115,12 +115,12 @@ func ParseAliases(data string) map[string]string {
 
 		pairs := SplitAliasTokens(body)
 		for _, pair := range pairs {
-			eqIdx := strings.IndexByte(pair, '=')
+			before, after, ok := strings.Cut(pair, "=")
-			if eqIdx < 0 {
+			if !ok {
 				continue
 			}
-			key := strings.TrimSpace(pair[:eqIdx])
+			key := strings.TrimSpace(before)
-			val := strings.Trim(strings.TrimSpace(pair[eqIdx+1:]), `"'`)
+			val := strings.Trim(strings.TrimSpace(after), `"'`)
 			if key != "" && val != "" {
 				aliases[key] = val
 			}

root/wrapper.go

@@ -170,7 +170,7 @@ func runWrapper() {
 						out, errCmd := exec.CommandContext(ctx, "lsof", "-p", fmt.Sprintf("%d", c.Process.Pid), "-a", "-d", "cwd", "-F", "n").Output()
 						cancel()
 						if errCmd == nil {
-							for _, line := range strings.Split(string(out), "\n") {
+							for line := range strings.SplitSeq(string(out), "\n") {
 								if strings.HasPrefix(line, "n") {
 									cwd = strings.TrimSpace(line[1:])
 									linkErr = nil
@@ -191,8 +191,8 @@ func runWrapper() {
 				if logDir, pathErr := config.CachePath(); pathErr == nil {
 					argsFile := filepath.Join(logDir, "reload-args")
 					if data, readErr := os.ReadFile(argsFile); readErr == nil {
-						lines := strings.Split(string(data), "\n")
+						lines := strings.SplitSeq(string(data), "\n")
-						for _, line := range lines {
+						for line := range lines {
 							trimmed := strings.TrimSpace(line)
 							if trimmed != "" {
 								execArgs = append(execArgs, trimmed)
@@ -560,10 +560,7 @@ func runWrapper() {
 							activeModeMu.RUnlock()
 							results := MergeResults("", currentMode)
 							if len(results) > 0 {
-								limit := 100
+								limit := min(len(results), 100)
-								if len(results) < limit {
-									limit = len(results)
-								}
 								var historyList []core.Suggestion
 
 								if inputSlice[i+2] == 'A' {

tests/dev/git_test.go

@@ -8,8 +8,8 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/versenilvis/iris/commands/core"
 	_ "github.com/versenilvis/iris/commands"
+	"github.com/versenilvis/iris/commands/core"
 )
 
 // setupGitRepo creates a real git repo in a temp dir with:
@@ -188,7 +188,6 @@ func TestGitSuggestions(t *testing.T) {
 		}
 	})
 
-
 	t.Run("branch with slash is suggested correctly", func(t *testing.T) {
 		res := core.Lookup("git checkout ")
 		found := false
@@ -204,13 +203,14 @@ func TestGitSuggestions(t *testing.T) {
 
 	t.Run("remote branches suggested for push", func(t *testing.T) {
 		res := core.Lookup("git push origin ")
-		cmdStr := ""
+		var cmdStr strings.Builder
 		for _, r := range res {
-			cmdStr += r.Cmd + " "
+			cmdStr.WriteString(r.Cmd)
+			cmdStr.WriteByte(' ')
 		}
 		// should have at least dev or main from branch list
-		if !strings.Contains(cmdStr, "dev") && !strings.Contains(cmdStr, "main") {
+		if !strings.Contains(cmdStr.String(), "dev") && !strings.Contains(cmdStr.String(), "main") {
-			t.Errorf("git push origin should suggest local branches, got: %s", cmdStr)
+			t.Errorf("git push origin should suggest local branches, got: %s", cmdStr.String())
 		}
 	})
 
@@ -226,8 +226,8 @@ func TestGitSuggestions(t *testing.T) {
 		res := core.Lookup("git checkout ")
 		for _, r := range res {
 			// the suggestion should not contain the active branch as a standalone word
-			parts := strings.Fields(r.Cmd)
+			parts := strings.FieldsSeq(r.Cmd)
-			for _, p := range parts {
+			for p := range parts {
 				if p == activeBranch {
 					t.Errorf("git checkout should not suggest active branch '%s', got: %s", activeBranch, r.Cmd)
 				}
@@ -365,8 +365,8 @@ func TestGitSuggestions(t *testing.T) {
 
 		res := core.Lookup("git -c core.pager=cat checkout ")
 		for _, r := range res {
-			parts := strings.Fields(r.Cmd)
+			parts := strings.FieldsSeq(r.Cmd)
-			for _, p := range parts {
+			for p := range parts {
 				if p == activeBranch {
 					t.Errorf("git -c core.pager=cat checkout should not suggest active branch '%s', got: %s", activeBranch, r.Cmd)
 				}

tests/dev/npm_ssh_test.go

@@ -7,9 +7,9 @@ import (
 	"strings"
 	"testing"
 
+	_ "github.com/versenilvis/iris/commands"
 	"github.com/versenilvis/iris/commands/core"
 	"github.com/versenilvis/iris/commands/js"
-	_ "github.com/versenilvis/iris/commands"
 )
 
 func TestNpmScriptGenerator(t *testing.T) {
@@ -20,11 +20,11 @@ func TestNpmScriptGenerator(t *testing.T) {
 		pkg := map[string]any{
 			"name": "test-app",
 			"scripts": map[string]string{
-				"dev":      "vite",
+				"dev":       "vite",
-				"build":    "vite build",
+				"build":     "vite build",
-				"test":     "vitest",
+				"test":      "vitest",
-				"lint":     "eslint .",
+				"lint":      "eslint .",
-				"preview":  "vite preview",
+				"preview":   "vite preview",
 				"typecheck": "tsc --noEmit",
 			},
 		}
@@ -173,7 +173,7 @@ func sshHostGeneratorFromPath(configPath string) []core.Suggestion {
 	_ = scanner
 
 	data, _ := os.ReadFile(configPath)
-	for _, line := range strings.Split(string(data), "\n") {
+	for line := range strings.SplitSeq(string(data), "\n") {
 		line = strings.TrimSpace(line)
 		if !strings.HasPrefix(strings.ToLower(line), "host ") {
 			continue