feat(cli): mcc --version command 보완

src/cmd/root.go

@@ -3,6 +3,7 @@ package cmd
 import (
 	"fmt"
 	"os"
+	"runtime/debug"
 
 	"github.com/spf13/cobra"
 
@@ -17,10 +18,40 @@ var RootCmd = &cobra.Command{
 	Use:               "mcc",
 	Short:             "A tool to operate M-CMP system",
 	Long:              `The mcc is a tool to operate M-CMP system.`,
+	Version:           buildVersion(),
 	CompletionOptions: cobra.CompletionOptions{HiddenDefaultCmd: true}, //completion 옵션 출력 제거
 	// Uncomment the following line if your bare application
 }
 
+// buildVersion reads the VCS revision Go embeds automatically when building
+// from within a git checkout (default since Go 1.18, no ldflags required).
+func buildVersion() string {
+	info, ok := debug.ReadBuildInfo()
+	if !ok {
+		return "dev"
+	}
+	var revision string
+	var dirty bool
+	for _, s := range info.Settings {
+		switch s.Key {
+		case "vcs.revision":
+			revision = s.Value
+		case "vcs.modified":
+			dirty = s.Value == "true"
+		}
+	}
+	if revision == "" {
+		return "dev"
+	}
+	if len(revision) > 12 {
+		revision = revision[:12]
+	}
+	if dirty {
+		revision += "-dirty"
+	}
+	return revision
+}
+
 // Execute adds all child commands to the root command and sets flags appropriately.
 // This is called by main.main(). It only needs to happen once to the rootCmd.
 func Execute() {