Add UUID valadation to disk_image

civo/instances/resource_instance.go

@@ -61,10 +61,11 @@ func ResourceInstance() *schema.Resource {
 				Description: "This must be the ID of the network from the network listing (optional; default network used when not specified)",
 			},
 			"disk_image": {
-				Type:        schema.TypeString,
-				Required:    true,
-				Description: "The ID for the disk image to use to build the instance",
-				ForceNew:    true,
+				Type:         schema.TypeString,
+				Required:     true,
+				Description:  "The ID for the disk image to use to build the instance",
+				ForceNew:     true,
+				ValidateFunc: utils.ValidateUUID,
 			},
 			"initial_user": {
 				Type:        schema.TypeString,

internal/utils/utils.go

@@ -240,3 +240,12 @@ func ParseErrorResponse(errorMsg string) (*CustomError, error) {
 	}
 	return &customErr, nil
 }
+
+// ValidateUUID checks if a given string is a UUID or not
+func ValidateUUID(v interface{}, k string) (ws []string, errors []error) {
+	value := v.(string)
+	if matched, _ := regexp.MatchString(`^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-4[a-fA-F0-9]{3}-[8|9|aA|bB][a-fA-F0-9]{3}-[a-fA-F0-9]{12}$`, value); !matched {
+		errors = append(errors, fmt.Errorf("%q must be a valid UUID", k))
+	}
+	return
+}