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72 lines
2.5 KiB
Go
72 lines
2.5 KiB
Go
/*
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Copyright 2018 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 describe
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import (
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"fmt"
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"k8s.io/apimachinery/pkg/api/meta"
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"k8s.io/cli-runtime/pkg/genericclioptions"
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)
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const (
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// LoadBalancerWidth is the width how we describe load balancer
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LoadBalancerWidth = 16
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// LabelNodeRolePrefix is a label prefix for node roles
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// It's copied over to here until it's merged in core: https://github.com/kubernetes/kubernetes/pull/39112
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LabelNodeRolePrefix = "node-role.kubernetes.io/"
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// NodeLabelRole specifies the role of a node
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NodeLabelRole = "kubernetes.io/role"
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)
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// DescriberFunc gives a way to display the specified RESTMapping type
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type DescriberFunc func(restClientGetter genericclioptions.RESTClientGetter, mapping *meta.RESTMapping) (Describer, error)
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// Describer generates output for the named resource or an error
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// if the output could not be generated. Implementers typically
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// abstract the retrieval of the named object from a remote server.
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type Describer interface {
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Describe(namespace, name string, describerSettings DescriberSettings) (output string, err error)
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}
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// DescriberSettings holds display configuration for each object
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// describer to control what is printed.
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type DescriberSettings struct {
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ShowEvents bool
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}
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// ObjectDescriber is an interface for displaying arbitrary objects with extra
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// information. Use when an object is in hand (on disk, or already retrieved).
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// Implementers may ignore the additional information passed on extra, or use it
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// by default. ObjectDescribers may return ErrNoDescriber if no suitable describer
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// is found.
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type ObjectDescriber interface {
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DescribeObject(object interface{}, extra ...interface{}) (output string, err error)
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}
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// ErrNoDescriber is a structured error indicating the provided object or objects
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// cannot be described.
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type ErrNoDescriber struct {
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Types []string
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}
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// Error implements the error interface.
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func (e ErrNoDescriber) Error() string {
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return fmt.Sprintf("no describer has been defined for %v", e.Types)
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}
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