feat: add version command (#84)

* add version command

* update hack/common

* add version command

Author: reshnm

cmd/version.go

@@ -0,0 +1,71 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	apimachineryversion "k8s.io/apimachinery/pkg/version"
+	"sigs.k8s.io/yaml"
+
+	ocmcli "github.com/openmcp-project/bootstrapper/internal/ocm-cli"
+
+	"github.com/openmcp-project/bootstrapper/internal/version"
+)
+
+// versionCmd represents the version command
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Print the version information",
+	Long: `Print the version information of the openMCP bootstrapper CLI.
+
+This command displays detailed version information including the build version,
+Git commit, build date, Go version, and platform information.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		ownVersion := version.GetVersion()
+
+		if ownVersion == nil {
+			fmt.Println("Version information not available")
+			return
+		}
+
+		printVersion(ownVersion, "openMCP Bootstrapper CLI")
+
+		var ocmVersion apimachineryversion.Info
+		out, err := ocmcli.ExecuteOutput(cmd.Context(), []string{"version"}, nil, ocmcli.NoOcmConfig)
+		if err != nil {
+			fmt.Printf("Error retrieving ocm-cli version: %ownVersion\n", err)
+			return
+		}
+
+		err = yaml.Unmarshal(out, &ocmVersion)
+		if err != nil {
+			fmt.Printf("Error parsing ocm-cli version output: %ownVersion\n", err)
+			return
+		}
+
+		printVersion(&ocmVersion, "OCM CLI")
+	},
+}
+
+func printVersion(v *apimachineryversion.Info, header string) {
+	fmt.Printf("\n%s\n", header)
+	fmt.Printf("========================\n")
+	fmt.Printf("Version:      %s\n", v.GitVersion)
+	if v.GitCommit != "" {
+		fmt.Printf("Git Commit:   %s\n", v.GitCommit)
+	}
+	if v.GitTreeState != "" {
+		fmt.Printf("Git State:    %s\n", v.GitTreeState)
+	}
+	if v.BuildDate != "" {
+		fmt.Printf("Build Date:   %s\n", v.BuildDate)
+	}
+	fmt.Printf("Go Version:   %s\n", v.GoVersion)
+	fmt.Printf("Compiler:     %s\n", v.Compiler)
+	fmt.Printf("Platform:     %s\n", v.Platform)
+	fmt.Printf("===================\n")
+}
+
+func init() {
+	RootCmd.AddCommand(versionCmd)
+}

hack/common

@@ -0,0 +1,47 @@
+package version
+
+import (
+	"fmt"
+	"runtime"
+	"strings"
+
+	apimachineryversion "k8s.io/apimachinery/pkg/version"
+)
+
+var (
+	// These variables are set during build time using -ldflags
+	// buildVersion is the semantic version of the build.
+	buildVersion = ""
+	// gitTreeState is either "clean" or "dirty" depending on the state of the git tree.
+	gitTreeState = ""
+	// gitCommit is the git commit hash of the build.
+	gitCommit = ""
+	// buildDate is the date of the build.
+	buildDate = ""
+)
+
+// GetVersion returns the version information of the build.
+func GetVersion() *apimachineryversion.Info {
+	var (
+		version  = strings.Split(buildVersion, ".")
+		gitMajor string
+		gitMinor string
+	)
+
+	if len(version) >= 2 {
+		gitMajor = version[0]
+		gitMinor = version[1]
+	}
+
+	return &apimachineryversion.Info{
+		Major:        gitMajor,
+		Minor:        gitMinor,
+		GitVersion:   buildVersion,
+		GitCommit:    gitCommit,
+		GitTreeState: gitTreeState,
+		BuildDate:    buildDate,
+		GoVersion:    runtime.Version(),
+		Compiler:     runtime.Compiler,
+		Platform:     fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH),
+	}
+}