| // Licensed to Apache Software Foundation (ASF) under one or more contributor |
| // license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright |
| // ownership. Apache Software Foundation (ASF) licenses this file to you under |
| // the Apache License, Version 2.0 (the "License"); you may |
| // not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| package kubernetes |
| |
| import ( |
| "encoding/hex" |
| "encoding/json" |
| "hash/fnv" |
| "strings" |
| |
| "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" |
| ) |
| |
| func getVersion(o *unstructured.Unstructured, key string) string { |
| ann := o.GetAnnotations() |
| if ann == nil { |
| return "" |
| } |
| return ann[key] |
| } |
| |
| func setVersion(o *unstructured.Unstructured, key string, version string) { |
| ann := make(map[string]string) |
| for k, v := range o.GetAnnotations() { |
| ann[k] = v |
| } |
| ann[key] = version |
| o.SetAnnotations(ann) |
| } |
| |
| func hash(o *unstructured.Unstructured) (string, error) { |
| forHashing := make(map[string]interface{}) |
| for field, contents := range o.Object { |
| if !isMeta(field) { |
| forHashing[field] = contents |
| } |
| } |
| if len(forHashing) == 0 { |
| forHashing = map[string]interface{}{"no-contents-use-meta": metaHash(o)} |
| } |
| bytes, err := json.Marshal(forHashing) |
| if err != nil { |
| return "", err |
| } |
| return alphanumeric(bytes), nil |
| } |
| |
| func metaHash(o *unstructured.Unstructured) string { |
| if o == nil { |
| return "-" |
| } |
| kind := o.GetObjectKind().GroupVersionKind().Kind |
| namespace := o.GetNamespace() |
| switch kind { |
| case "ClusterRole", "ClusterRoleBinding": |
| namespace = "" |
| } |
| return strings.Join([]string{kind, namespace, o.GetName()}, ":") |
| } |
| |
| func isMeta(name string) bool { |
| switch name { |
| case "kind", "apiVersion", "metadata": |
| return true |
| |
| default: |
| return false |
| } |
| } |
| |
| func alphanumeric(in []byte) string { |
| if in == nil { |
| return "" |
| } |
| |
| hash := fnv.New64a() |
| _, _ = hash.Write(in) |
| out := hash.Sum(make([]byte, 0, 8)) |
| return hex.EncodeToString(out) |
| } |