add JSON export

Signed-off-by: Jeff Carr <jcarr@wit.com>

configfile/main.go

@@ -36,6 +36,13 @@ func main() {
 	for _, h := range aCluster.Hypervisors {
 		log.Println("\thypervisor =", h.Hostname, h.GetMemoryPrintable())
 	}
+
+	b, err := aCluster.MarshalJSON()
+	if err != nil {
+		log.Println("json failed")
+	} else {
+		log.Println(string(b))
+	}
 }
 
 func marshalWriteToFile(myWriter *bufio.Writer, c *pb.Cluster) {

helpers.go

@@ -1,6 +1,9 @@
 package virtbuf
 
 import "fmt"
+import (
+    "google.golang.org/protobuf/encoding/protojson"
+)
 
 func (x *Hypervisor) SetMemoryGB(gb int) {
 	x.Memory = int64(gb * 1024 * 1024 * 1024)
@@ -10,3 +13,12 @@ func (x *Hypervisor) GetMemoryPrintable() string {
 	i := x.Memory / (1024 * 1024 * 1024)
 	return fmt.Sprintf("%d GB", i)
 }
+
+
+func (c *Cluster) MarshalJSON() ([]byte, error) {
+    return protojson.Marshal(c)
+}
+
+func (c *Cluster) UnmarshalJSON(data []byte) error {
+    return protojson.Unmarshal(data, c)
+}