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 {
-		cp[k] = v
-	}
+	maps.Copy(cp, ShellAliases)
 	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 a == tok {
-						match = true
-						break
-					}
+				if slices.Contains(sub.Aliases, tok) {
+					match = true
 				}
 			}
 
@@ -209,8 +206,8 @@ func Lookup(input string) []Suggestion {
 				suggested = "\"" + suggested + "\""
 			}
 
-			// if the suggestion is a full path that includes 
-			// words already in the command line (multi-word support), we replace 
+			// if the suggestion is a full path that includes
+			// 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
-				if len(dirs) < limit {
-					limit = len(dirs)
-				}
+				limit := min(len(dirs), 20)
 				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, "#") {
-					lastComment = strings.TrimSpace(strings.TrimPrefix(line, "#"))
+				if after, ok := strings.CutPrefix(line, "#"); ok {
+					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