add resource prefix to multiple items w/ same kind

This patch ensures that a resource prefix is added to multiple items of
the same kind, when using `oc get all`. Before, a prefix was added only
when a single item was returned on `oc get all`, but ignored if only a
single resource kind existed but multiple items for that kind were
returned.

pkg/kubectl/resource/builder.go

@@ -803,3 +803,36 @@ func HasNames(args []string) (bool, error) {
 	}
 	return hasCombinedTypes || len(args) > 1, nil
 }
+
+// MultipleTypesRequested returns true if the provided args contain multiple resource kinds
+func MultipleTypesRequested(args []string) bool {
+	args = normalizeMultipleResourcesArgs(args)
+	rKinds := sets.NewString()
+	for _, arg := range args {
+		if arg == "all" {
+			return true
+		}
+		rTuple, found, err := splitResourceTypeName(arg)
+		if err != nil {
+			continue
+		}
+
+		// if tuple not found, assume arg is of the form "type1,type2,...".
+		// Since SplitResourceArgument returns a unique list of kinds,
+		// return true here if len(uniqueList) > 1
+		if !found {
+			if strings.Contains(arg, ",") {
+				splitArgs := SplitResourceArgument(arg)
+				if len(splitArgs) > 1 {
+					return true
+				}
+			}
+			continue
+		}
+		if rKinds.Has(rTuple.Resource) {
+			continue
+		}
+		rKinds.Insert(rTuple.Resource)
+	}
+	return (rKinds.Len() > 1)
+}