mirror of https://github.com/knative/client.git
103 lines
3.1 KiB
Go
103 lines
3.1 KiB
Go
// Copyright © 2019 The Knative Authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package flags
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import (
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"io"
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"github.com/spf13/cobra"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/cli-runtime/pkg/genericclioptions"
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"knative.dev/client/pkg/commands"
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hprinters "knative.dev/client/pkg/printers"
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"knative.dev/client/pkg/util"
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)
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// ListFlags composes common printer flag structs
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// used in the list command.
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type ListPrintFlags struct {
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GenericPrintFlags *genericclioptions.PrintFlags
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HumanReadableFlags *commands.HumanPrintFlags
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PrinterHandler func(h hprinters.PrintHandler)
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}
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// AllowedFormats is the list of formats in which data can be displayed
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func (f *ListPrintFlags) AllowedFormats() []string {
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formats := f.GenericPrintFlags.AllowedFormats()
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formats = append(formats, f.HumanReadableFlags.AllowedFormats()...)
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return formats
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}
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// ToPrinter attempts to find a composed set of ListTypesFlags suitable for
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// returning a printer based on current flag values.
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func (f *ListPrintFlags) ToPrinter() (hprinters.ResourcePrinter, error) {
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// if there are flags specified for generic printing
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if f.GenericPrintFlags.OutputFlagSpecified() {
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p, err := f.GenericPrintFlags.ToPrinter()
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if err != nil {
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return nil, err
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}
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return p, nil
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}
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p, err := f.HumanReadableFlags.ToPrinter(f.PrinterHandler)
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if err != nil {
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return nil, err
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}
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return p, nil
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}
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// Print is to print an Object to a Writer
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func (f *ListPrintFlags) Print(obj runtime.Object, w io.Writer) error {
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printer, err := f.ToPrinter()
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if err != nil {
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return err
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}
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if f.GenericPrintFlags.OutputFlagSpecified() {
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unstructuredList, err := util.ToUnstructuredList(obj)
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if err != nil {
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return err
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}
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return printer.PrintObj(unstructuredList, w)
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}
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return printer.PrintObj(obj, w)
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}
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// AddFlags receives a *cobra.Command reference and binds
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// flags related to humanreadable and template printing.
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func (f *ListPrintFlags) AddFlags(cmd *cobra.Command) {
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f.GenericPrintFlags.AddFlags(cmd)
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f.HumanReadableFlags.AddFlags(cmd)
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}
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// NewListFlags returns flags associated with humanreadable,
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// template, and "name" printing, with default values set.
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func NewListPrintFlags(printer func(h hprinters.PrintHandler)) *ListPrintFlags {
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return &ListPrintFlags{
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GenericPrintFlags: genericclioptions.NewPrintFlags(""),
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HumanReadableFlags: commands.NewHumanPrintFlags(),
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PrinterHandler: printer,
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}
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}
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// EnsureWithNamespace ensures that humanreadable flags return
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// a printer capable of printing with a "namespace" column.
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func (f *ListPrintFlags) EnsureWithNamespace() {
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f.HumanReadableFlags.EnsureWithNamespace()
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}
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