Keep version information short and readable

Author: sibprogrammer

main.go

@@ -19,7 +19,7 @@ import (
 )
 
 var (
-	commit = "000000"
+	commit = "0000000"
 	date   = ""
 )
 
@@ -67,12 +67,7 @@ func parseFlags() execOptions {
 	pflag.Parse()
 
 	if *showVersion {
-		fullVersion := strings.TrimSpace(version)
-		if date != "" {
-			fullVersion += fmt.Sprintf(" (%s, %s)", date, commit)
-		}
-		fmt.Printf("qbench %s", fullVersion)
-		fmt.Println()
+		printVersion()
 		os.Exit(0)
 	}
 
@@ -119,6 +114,29 @@ func parseFlags() execOptions {
 	}
 }
 
+func shortCommit(hash string) string {
+	if len(hash) > 7 {
+		return hash[:7]
+	}
+	return hash
+}
+
+func shortDate(d string) string {
+	if t, err := time.Parse(time.RFC3339, d); err == nil {
+		return t.Format("2006-01-02")
+	}
+	return d
+}
+
+func printVersion() {
+	fullVersion := strings.TrimSpace(version)
+	if date != "" {
+		fullVersion += fmt.Sprintf(" (%s, %s)", shortDate(date), shortCommit(commit))
+	}
+	fmt.Printf("qbench %s", fullVersion)
+	fmt.Println()
+}
+
 func openDB(options execOptions) *sql.DB {
 	db, err := sql.Open(options.driver, options.dsn)
 	if err != nil {

main_test.go

@@ -71,6 +71,47 @@ func makeRange(min, max int) []float64 {
 	return r
 }
 
+func TestShortCommit(t *testing.T) {
+	tests := []struct {
+		name string
+		hash string
+		want string
+	}{
+		{"full 40-char hash", "abc1234567890def1234567890abcdef12345678", "abc1234"},
+		{"empty string", "", ""},
+		{"default commit", "0000000", "0000000"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := shortCommit(tt.hash)
+			if got != tt.want {
+				t.Errorf("shortCommit(%q) = %q, want %q", tt.hash, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestShortDate(t *testing.T) {
+	tests := []struct {
+		name string
+		date string
+		want string
+	}{
+		{"RFC3339 full", "2026-03-08T22:08:22Z", "2026-03-08"},
+		{"empty", "", ""},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := shortDate(tt.date)
+			if got != tt.want {
+				t.Errorf("shortDate(%q) = %q, want %q", tt.date, got, tt.want)
+			}
+		})
+	}
+}
+
 func setupTestDB(t *testing.T) (*sql.DB, string) {
 	t.Helper()
 	tmpFile, err := os.CreateTemp("", "qbench-test-*.db")