feat: update --version output to include Go version and os/arch

main.go

@@ -5,7 +5,10 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"regexp"
+	"runtime"
 	"runtime/debug"
+	"strings"
 
 	"golang.org/x/term"
 
@@ -39,6 +42,16 @@ var (
 
 var Version = "dev" // This will be set by the build systems to the release version
 
+var semverRe = regexp.MustCompile(`^\d+\.\d+\.\d+`)
+
+func buildVersionOutput(version string) string {
+	normalized := version
+	if semverRe.MatchString(normalized) && !strings.HasPrefix(normalized, "v") {
+		normalized = "v" + normalized
+	}
+	return fmt.Sprintf("%s (%s, %s/%s)", normalized, runtime.Version(), runtime.GOOS, runtime.GOARCH)
+}
+
 func main() {
 	// Set the build version from the build info if not set by the build system
 	if Version == "dev" || Version == "" {
@@ -54,7 +67,7 @@ func main() {
 	flag.Parse()
 
 	if *showVersion {
-		fmt.Println("Version:", Version)
+		fmt.Printf("yamltecture version %s\n", buildVersionOutput(Version))
 		return
 	}
 

main_test.go

@@ -3,8 +3,10 @@ package main
 
 import (
 	"bytes"
+	"fmt"
 	"os"
 	"os/exec"
+	"runtime"
 	"testing"
 )
 
@@ -230,3 +232,30 @@ func TestCLICommands(t *testing.T) {
 		})
 	}
 }
+
+func TestBuildVersionOutputAddsVPrefixAndMetadata(t *testing.T) {
+	got := buildVersionOutput("1.2.3")
+	want := fmt.Sprintf("v1.2.3 (%s, %s/%s)", runtime.Version(), runtime.GOOS, runtime.GOARCH)
+
+	if got != want {
+		t.Fatalf("unexpected version output: got %q, want %q", got, want)
+	}
+}
+
+func TestBuildVersionOutputPreservesExistingVPrefix(t *testing.T) {
+	got := buildVersionOutput("v1.2.3")
+	want := fmt.Sprintf("v1.2.3 (%s, %s/%s)", runtime.Version(), runtime.GOOS, runtime.GOARCH)
+
+	if got != want {
+		t.Fatalf("unexpected version output: got %q, want %q", got, want)
+	}
+}
+
+func TestBuildVersionOutputNoVPrefixForDev(t *testing.T) {
+	got := buildVersionOutput("dev")
+	want := fmt.Sprintf("dev (%s, %s/%s)", runtime.Version(), runtime.GOOS, runtime.GOARCH)
+
+	if got != want {
+		t.Fatalf("unexpected version output: got %q, want %q", got, want)
+	}
+}