146 lines
4.6 KiB
Go
146 lines
4.6 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package v1beta1
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import (
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"fmt"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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// PolicyRuleBuilder let's us attach methods. A no-no for API types.
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// We use it to construct rules in code. It's more compact than trying to write them
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// out in a literal and allows us to perform some basic checking during construction
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type PolicyRuleBuilder struct {
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PolicyRule PolicyRule `protobuf:"bytes,1,opt,name=policyRule"`
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}
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func NewRule(verbs ...string) *PolicyRuleBuilder {
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return &PolicyRuleBuilder{
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PolicyRule: PolicyRule{Verbs: verbs},
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}
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}
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func (r *PolicyRuleBuilder) Groups(groups ...string) *PolicyRuleBuilder {
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r.PolicyRule.APIGroups = append(r.PolicyRule.APIGroups, groups...)
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return r
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}
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func (r *PolicyRuleBuilder) Resources(resources ...string) *PolicyRuleBuilder {
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r.PolicyRule.Resources = append(r.PolicyRule.Resources, resources...)
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return r
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}
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func (r *PolicyRuleBuilder) Names(names ...string) *PolicyRuleBuilder {
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r.PolicyRule.ResourceNames = append(r.PolicyRule.ResourceNames, names...)
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return r
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}
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func (r *PolicyRuleBuilder) URLs(urls ...string) *PolicyRuleBuilder {
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r.PolicyRule.NonResourceURLs = append(r.PolicyRule.NonResourceURLs, urls...)
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return r
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}
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func (r *PolicyRuleBuilder) RuleOrDie() PolicyRule {
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ret, err := r.Rule()
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if err != nil {
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panic(err)
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}
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return ret
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}
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func (r *PolicyRuleBuilder) Rule() (PolicyRule, error) {
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if len(r.PolicyRule.Verbs) == 0 {
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return PolicyRule{}, fmt.Errorf("verbs are required: %#v", r.PolicyRule)
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}
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switch {
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case len(r.PolicyRule.NonResourceURLs) > 0:
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if len(r.PolicyRule.APIGroups) != 0 || len(r.PolicyRule.Resources) != 0 || len(r.PolicyRule.ResourceNames) != 0 {
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return PolicyRule{}, fmt.Errorf("non-resource rule may not have apiGroups, resources, or resourceNames: %#v", r.PolicyRule)
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}
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case len(r.PolicyRule.Resources) > 0:
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if len(r.PolicyRule.NonResourceURLs) != 0 {
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return PolicyRule{}, fmt.Errorf("resource rule may not have nonResourceURLs: %#v", r.PolicyRule)
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}
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if len(r.PolicyRule.APIGroups) == 0 {
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// this a common bug
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return PolicyRule{}, fmt.Errorf("resource rule must have apiGroups: %#v", r.PolicyRule)
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}
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default:
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return PolicyRule{}, fmt.Errorf("a rule must have either nonResourceURLs or resources: %#v", r.PolicyRule)
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}
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return r.PolicyRule, nil
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}
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// ClusterRoleBindingBuilder let's us attach methods. A no-no for API types.
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// We use it to construct bindings in code. It's more compact than trying to write them
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// out in a literal.
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type ClusterRoleBindingBuilder struct {
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ClusterRoleBinding ClusterRoleBinding `protobuf:"bytes,1,opt,name=clusterRoleBinding"`
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}
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func NewClusterBinding(clusterRoleName string) *ClusterRoleBindingBuilder {
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return &ClusterRoleBindingBuilder{
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ClusterRoleBinding: ClusterRoleBinding{
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ObjectMeta: metav1.ObjectMeta{Name: clusterRoleName},
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RoleRef: RoleRef{
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APIGroup: GroupName,
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Kind: "ClusterRole",
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Name: clusterRoleName,
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},
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},
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}
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}
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func (r *ClusterRoleBindingBuilder) Groups(groups ...string) *ClusterRoleBindingBuilder {
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for _, group := range groups {
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r.ClusterRoleBinding.Subjects = append(r.ClusterRoleBinding.Subjects, Subject{Kind: GroupKind, Name: group})
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}
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return r
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}
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func (r *ClusterRoleBindingBuilder) Users(users ...string) *ClusterRoleBindingBuilder {
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for _, user := range users {
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r.ClusterRoleBinding.Subjects = append(r.ClusterRoleBinding.Subjects, Subject{Kind: UserKind, Name: user})
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}
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return r
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}
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func (r *ClusterRoleBindingBuilder) SAs(namespace string, serviceAccountNames ...string) *ClusterRoleBindingBuilder {
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for _, saName := range serviceAccountNames {
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r.ClusterRoleBinding.Subjects = append(r.ClusterRoleBinding.Subjects, Subject{Kind: ServiceAccountKind, Namespace: namespace, Name: saName})
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}
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return r
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}
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func (r *ClusterRoleBindingBuilder) BindingOrDie() ClusterRoleBinding {
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ret, err := r.Binding()
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if err != nil {
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panic(err)
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}
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return ret
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}
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func (r *ClusterRoleBindingBuilder) Binding() (ClusterRoleBinding, error) {
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if len(r.ClusterRoleBinding.Subjects) == 0 {
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return ClusterRoleBinding{}, fmt.Errorf("subjects are required: %#v", r.ClusterRoleBinding)
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}
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return r.ClusterRoleBinding, nil
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}
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