mirror of https://github.com/knative/client.git
106 lines
2.9 KiB
Go
106 lines
2.9 KiB
Go
// Copyright © 2020 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 channel
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import (
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"errors"
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"fmt"
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"github.com/spf13/cobra"
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"k8s.io/cli-runtime/pkg/genericclioptions"
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messagingv1beta1 "knative.dev/eventing/pkg/apis/messaging/v1beta1"
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knerrors "knative.dev/client/pkg/errors"
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"knative.dev/client/pkg/kn/commands"
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"knative.dev/client/pkg/printers"
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)
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// NewChannelDescribeCommand returns a new command for describe a channel object
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func NewChannelDescribeCommand(p *commands.KnParams) *cobra.Command {
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// For machine readable output
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machineReadablePrintFlags := genericclioptions.NewPrintFlags("")
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cmd := &cobra.Command{
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Use: "describe NAME",
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Short: "Show details of a channel",
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Example: `
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# Describe a channel 'pipe'
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kn channel describe pipe`,
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RunE: func(cmd *cobra.Command, args []string) error {
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if len(args) != 1 {
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return errors.New("'kn channel describe' requires the channel name given as single argument")
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}
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name := args[0]
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client, err := newChannelClient(p, cmd)
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if err != nil {
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return err
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}
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channel, err := client.GetChannel(name)
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if err != nil {
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return knerrors.GetError(err)
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}
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out := cmd.OutOrStdout()
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if machineReadablePrintFlags.OutputFlagSpecified() {
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printer, err := machineReadablePrintFlags.ToPrinter()
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if err != nil {
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return err
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}
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return printer.PrintObj(channel, out)
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}
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dw := printers.NewPrefixWriter(out)
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printDetails, err := cmd.Flags().GetBool("verbose")
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if err != nil {
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return err
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}
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writeChannel(dw, channel, printDetails)
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dw.WriteLine()
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if err := dw.Flush(); err != nil {
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return err
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}
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// Condition info
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commands.WriteConditions(dw, channel.Status.Conditions, printDetails)
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if err := dw.Flush(); err != nil {
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return err
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}
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return nil
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},
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}
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flags := cmd.Flags()
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commands.AddNamespaceFlags(flags, false)
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flags.BoolP("verbose", "v", false, "More output.")
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machineReadablePrintFlags.AddFlags(cmd)
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return cmd
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}
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func writeChannel(dw printers.PrefixWriter, channel *messagingv1beta1.Channel, printDetails bool) {
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commands.WriteMetadata(dw, &channel.ObjectMeta, printDetails)
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ctype := fmt.Sprintf("%s (%s)", channel.Spec.ChannelTemplate.Kind, channel.Spec.ChannelTemplate.APIVersion)
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dw.WriteAttribute("Type", ctype)
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if channel.Status.Address != nil {
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dw.WriteAttribute("URL", channel.Status.Address.URL.String())
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}
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}
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