mirror of https://github.com/knative/client.git
122 lines
3.4 KiB
Go
122 lines
3.4 KiB
Go
/*
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Copyright 2020 The Knative 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 broker
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import (
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"errors"
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"fmt"
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"io"
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"strings"
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"k8s.io/cli-runtime/pkg/genericclioptions"
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"github.com/spf13/cobra"
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v1beta1 "knative.dev/eventing/pkg/apis/eventing/v1"
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"knative.dev/client/pkg/commands"
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"knative.dev/client/pkg/printers"
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)
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var describeExample = `
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# Describe broker 'mybroker' in the current namespace
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kn broker describe mybroker
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# Describe broker 'mybroker' in the 'myproject' namespace
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kn broker describe mybroker --namespace myproject
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# Describe broker 'mybroker' in YAML format
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kn broker describe mybroker -o yaml
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# Print only broker URL
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kn broker describe mybroker -o url`
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// NewBrokerDescribeCommand represents command to describe details of broker instance
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func NewBrokerDescribeCommand(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: "Describe broker",
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Example: describeExample,
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ValidArgsFunction: commands.ResourceNameCompletionFunc(p),
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RunE: func(cmd *cobra.Command, args []string) (err error) {
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if len(args) != 1 {
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return errors.New("'broker describe' requires the broker name given as single argument")
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}
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name := args[0]
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namespace, err := p.GetNamespace(cmd)
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if err != nil {
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return err
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}
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eventingClient, err := p.NewEventingClient(namespace)
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if err != nil {
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return err
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}
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broker, err := eventingClient.GetBroker(cmd.Context(), name)
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if err != nil {
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return err
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}
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out := cmd.OutOrStdout()
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if machineReadablePrintFlags.OutputFlagSpecified() {
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if strings.ToLower(*machineReadablePrintFlags.OutputFormat) == "url" {
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fmt.Fprintf(out, "%s\n", extractURL(broker))
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return nil
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}
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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(broker, out)
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}
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return describeBroker(out, broker, false)
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},
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}
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commands.AddNamespaceFlags(cmd.Flags(), false)
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machineReadablePrintFlags.AddFlags(cmd)
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cmd.Flag("output").Usage = fmt.Sprintf("Output format. One of: %s.", strings.Join(append(machineReadablePrintFlags.AllowedFormats(), "url"), "|"))
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return cmd
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}
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// describeBroker print broker details to the provided output writer
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func describeBroker(out io.Writer, broker *v1beta1.Broker, printDetails bool) error {
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dw := printers.NewPrefixWriter(out)
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commands.WriteMetadata(dw, &broker.ObjectMeta, printDetails)
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dw.WriteLine()
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dw.WriteAttribute("Address", "").WriteAttribute("URL", extractURL(broker))
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dw.WriteLine()
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commands.WriteConditions(dw, broker.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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func extractURL(broker *v1beta1.Broker) string {
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if broker.Status.AddressStatus.Address != nil {
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return broker.Status.AddressStatus.Address.URL.String()
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}
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return ""
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}
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