enable preserving order with generatorOptions

pkg/commands/kustfile/kustomizationfile.go

@@ -64,7 +64,7 @@ func determineFieldOrder() []string {
 		"PatchesJson6902",
 		"ConfigMapGenerator",
 		"SecretGenerator",
-		// "GeneratorOptions",
+		"GeneratorOptions",
 		"Vars",
 		"ImageTags",
 	}
@@ -91,12 +91,6 @@ func determineFieldOrder() []string {
 			result = append(result, n)
 		}
 	}
-	// TODO fix GeneratorOptions.
-	for k := range m {
-		if !m[k] && k != "GeneratorOptions" {
-			log.Fatalf("We're ignoring field '%s'", k)
-		}
-	}
 	return result
 }
 
@@ -281,7 +275,7 @@ func marshalField(field string, kustomization *types.Kustomization) ([]byte, err
 	r := reflect.ValueOf(*kustomization)
 	v := r.FieldByName(strings.Title(field))
 
-	if !v.IsValid() || v.Len() == 0 {
+	if !v.IsValid() || isEmpty(v) {
 		return []byte{}, nil
 	}
 
@@ -292,3 +286,11 @@ func marshalField(field string, kustomization *types.Kustomization) ([]byte, err
 
 	return yaml.Marshal(k)
 }
+
+func isEmpty(v reflect.Value) bool {
+	// If v is a pointer type
+	if v.Type().Kind() == reflect.Ptr {
+		return v.IsNil()
+	}
+	return v.Len() == 0
+}

pkg/commands/kustfile/kustomizationfile_test.go

@@ -40,7 +40,7 @@ func TestFieldOrder(t *testing.T) {
 		"PatchesJson6902",
 		"ConfigMapGenerator",
 		"SecretGenerator",
-		// "GeneratorOptions",
+		"GeneratorOptions",
 		"Vars",
 		"ImageTags",
 	}
@@ -219,6 +219,9 @@ BASES:
 patchesStrategicMerge:
 - service.yaml
 - pod.yaml
+# generator options
+generatorOptions:
+  disableHash: true
 `)
 
 	expected := []byte(`
@@ -254,6 +257,9 @@ bases:
 patchesStrategicMerge:
 - service.yaml
 - pod.yaml
+# generator options
+generatorOptions:
+  disableHash: true
 `)
 	fSys := fs.MakeFakeFS()
 	fSys.WriteTestKustomizationWith(kustomizationContentWithComments)