feat: add version command (#26)

cmd/version/version.go

@@ -0,0 +1,34 @@
+package version
+
+import (
+	"fmt"
+	"os"
+	runtimeDebug "runtime/debug"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	version string
+	commit  string
+)
+
+func init() {
+	if version == "" {
+		buildInfo, _ := runtimeDebug.ReadBuildInfo()
+		version = buildInfo.Main.Version
+	}
+}
+
+func NewVersionCommand() *cobra.Command {
+	return &cobra.Command{
+		Use:   "version",
+		Short: "Show version and build information",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			fmt.Fprintf(os.Stdout, "Version: %s\n", version)
+			fmt.Fprintf(os.Stdout, "CommitSHA: %s\n", commit)
+
+			return nil
+		},
+	}
+}