only use a single initial for double sized runes

pkg/gui/presentation/commits.go

@@ -11,6 +11,7 @@ import (
 	"github.com/jesseduffield/lazygit/pkg/utils"
 	"github.com/kyokomi/emoji/v2"
 	colorful "github.com/lucasb-eyer/go-colorful"
+	"github.com/mattn/go-runewidth"
 )
 
 func GetCommitListDisplayStrings(commits []*models.Commit, fullDescription bool, cherryPickedCommitShaMap map[string]bool, diffName string, parseEmoji bool) [][]string {
@@ -166,19 +167,16 @@ func randFloat(hash []byte) float64 {
 	return float64(sum) / 100
 }
 
-var authorStyles = []style.TextStyle{
-	style.FgGreen,
-	style.FgYellow,
-	style.FgMagenta,
-	style.FgCyan,
-	style.FgRed,
-}
-
 func getInitials(authorName string) string {
 	if authorName == "" {
 		return authorName
 	}
 
+	firstRune := getFirstRune(authorName)
+	if runewidth.RuneWidth(firstRune) > 1 {
+		return string(firstRune)
+	}
+
 	split := strings.Split(authorName, " ")
 	if len(split) == 1 {
 		return utils.LimitStr(authorName, 2)
@@ -187,6 +185,15 @@ func getInitials(authorName string) string {
 	return utils.LimitStr(split[0], 1) + utils.LimitStr(split[1], 1)
 }
 
+func getFirstRune(str string) rune {
+	// just using the loop for the sake of getting the first rune
+	for _, r := range str {
+		return r
+	}
+	// should never land here
+	return 0
+}
+
 func actionColorMap(str string) style.TextStyle {
 	switch str {
 	case "pick":

pkg/gui/presentation/commits_test.go

@@ -3,15 +3,18 @@ package presentation
 import "testing"
 
 func TestGetInitials(t *testing.T) {
-	for input, output := range map[string]string{
+	for input, expectedOutput := range map[string]string{
 		"Jesse Duffield":     "JD",
 		"Jesse Duffield Man": "JD",
 		"JesseDuffield":      "Je",
 		"J":                  "J",
+		"六书六書":               "六",
+		"書":                  "書",
 		"":                   "",
 	} {
-		if output != getInitials(input) {
-			t.Errorf("Expected %s to be %s", input, output)
+		output := getInitials(input)
+		if output != expectedOutput {
+			t.Errorf("Expected %s to be %s", output, expectedOutput)
 		}
 	}
 }