d2vm: add version command, lookup mbr.bin in well-known paths

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

cmd/d2vm/main.go

@@ -18,6 +18,8 @@ import (
 	"context"
 
 	"github.com/spf13/cobra"
+
+	"go.linka.cloud/d2vm"
 )
 
 var (
@@ -31,6 +33,7 @@ var (
 	rootCmd = &cobra.Command{
 		Use:          "d2vm",
 		SilenceUsage: true,
+		Version:      d2vm.Version,
 	}
 )
 

cmd/d2vm/version.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	"go.linka.cloud/d2vm"
+)
+
+var (
+	cmdVersion = &cobra.Command{
+		Use: "version",
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println(d2vm.Version)
+			fmt.Println(d2vm.BuildDate)
+		},
+	}
+)
+
+func init() {
+	rootCmd.AddCommand(cmdVersion)
+}