mirror of
https://github.com/k3s-io/kubernetes.git
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146 lines
4.4 KiB
Go
146 lines
4.4 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 get
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import (
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"github.com/spf13/cobra"
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"k8s.io/cli-runtime/pkg/genericclioptions"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/kubernetes/pkg/kubectl/scheme"
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"k8s.io/kubernetes/pkg/printers"
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printersinternal "k8s.io/kubernetes/pkg/printers/internalversion"
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)
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// HumanPrintFlags provides default flags necessary for printing.
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// Given the following flag values, a printer can be requested that knows
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// how to handle printing based on these values.
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type HumanPrintFlags struct {
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ShowKind *bool
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ShowLabels *bool
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SortBy *string
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ColumnLabels *[]string
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// get.go-specific values
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NoHeaders bool
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Kind schema.GroupKind
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AbsoluteTimestamps bool
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WithNamespace bool
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}
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// SetKind sets the Kind option
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func (f *HumanPrintFlags) SetKind(kind schema.GroupKind) {
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f.Kind = kind
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}
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// EnsureWithKind sets the "Showkind" humanreadable option to true.
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func (f *HumanPrintFlags) EnsureWithKind() error {
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showKind := true
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f.ShowKind = &showKind
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return nil
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}
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// EnsureWithNamespace sets the "WithNamespace" humanreadable option to true.
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func (f *HumanPrintFlags) EnsureWithNamespace() error {
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f.WithNamespace = true
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return nil
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}
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// AllowedFormats returns more customized formating options
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func (f *HumanPrintFlags) AllowedFormats() []string {
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return []string{"wide"}
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}
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// ToPrinter receives an outputFormat and returns a printer capable of
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// handling human-readable output.
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func (f *HumanPrintFlags) ToPrinter(outputFormat string) (printers.ResourcePrinter, error) {
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if len(outputFormat) > 0 && outputFormat != "wide" {
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return nil, genericclioptions.NoCompatiblePrinterError{Options: f, AllowedFormats: f.AllowedFormats()}
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}
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decoder := scheme.Codecs.UniversalDecoder()
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showKind := false
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if f.ShowKind != nil {
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showKind = *f.ShowKind
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}
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showLabels := false
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if f.ShowLabels != nil {
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showLabels = *f.ShowLabels
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}
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columnLabels := []string{}
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if f.ColumnLabels != nil {
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columnLabels = *f.ColumnLabels
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}
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p := printers.NewHumanReadablePrinter(decoder, printers.PrintOptions{
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Kind: f.Kind,
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WithKind: showKind,
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NoHeaders: f.NoHeaders,
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Wide: outputFormat == "wide",
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WithNamespace: f.WithNamespace,
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ColumnLabels: columnLabels,
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ShowLabels: showLabels,
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})
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printersinternal.AddHandlers(p)
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// TODO(juanvallejo): handle sorting here
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return p, nil
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}
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// AddFlags receives a *cobra.Command reference and binds
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// flags related to human-readable printing to it
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func (f *HumanPrintFlags) AddFlags(c *cobra.Command) {
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if f.ShowLabels != nil {
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c.Flags().BoolVar(f.ShowLabels, "show-labels", *f.ShowLabels, "When printing, show all labels as the last column (default hide labels column)")
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}
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if f.SortBy != nil {
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c.Flags().StringVar(f.SortBy, "sort-by", *f.SortBy, "If non-empty, sort list types using this field specification. The field specification is expressed as a JSONPath expression (e.g. '{.metadata.name}'). The field in the API resource specified by this JSONPath expression must be an integer or a string.")
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}
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if f.ColumnLabels != nil {
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c.Flags().StringSliceVarP(f.ColumnLabels, "label-columns", "L", *f.ColumnLabels, "Accepts a comma separated list of labels that are going to be presented as columns. Names are case-sensitive. You can also use multiple flag options like -L label1 -L label2...")
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}
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if f.ShowKind != nil {
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c.Flags().BoolVar(f.ShowKind, "show-kind", *f.ShowKind, "If present, list the resource type for the requested object(s).")
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}
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}
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// NewHumanPrintFlags returns flags associated with
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// human-readable printing, with default values set.
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func NewHumanPrintFlags() *HumanPrintFlags {
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showLabels := false
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sortBy := ""
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showKind := false
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columnLabels := []string{}
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return &HumanPrintFlags{
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NoHeaders: false,
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WithNamespace: false,
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AbsoluteTimestamps: false,
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ColumnLabels: &columnLabels,
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Kind: schema.GroupKind{},
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ShowLabels: &showLabels,
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SortBy: &sortBy,
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ShowKind: &showKind,
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}
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}
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