a5746c9a0e
Display usage string, not long help, as code, remove angle brackets from output (.md interprets as tags and hides).
132 lines
3.7 KiB
Go
132 lines
3.7 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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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 config
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import (
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"fmt"
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"io"
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"os"
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"github.com/golang/glog"
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"github.com/spf13/cobra"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client/clientcmd"
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clientcmdapi "github.com/GoogleCloudPlatform/kubernetes/pkg/client/clientcmd/api"
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cmdutil "github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl/cmd/util"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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)
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type viewOptions struct {
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pathOptions *pathOptions
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merge util.BoolFlag
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}
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const (
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view_long = `displays merged .kubeconfig settings or a specified .kubeconfig file.
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You can use --output=template --template=TEMPLATE to extract specific values.`
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view_example = `// Show merged .kubeconfig settings.
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$ kubectl config view
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// Show only local ./.kubeconfig settings
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$ kubectl config view --local
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// Get the password for the e2e user
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$ kubectl config view -o template --template='{{ index . "users" "e2e" "password" }}'`
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)
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func NewCmdConfigView(out io.Writer, pathOptions *pathOptions) *cobra.Command {
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options := &viewOptions{pathOptions: pathOptions}
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cmd := &cobra.Command{
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Use: "view",
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Short: "displays merged .kubeconfig settings or a specified .kubeconfig file.",
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Long: view_long,
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Example: view_example,
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Run: func(cmd *cobra.Command, args []string) {
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options.complete()
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printer, _, err := cmdutil.PrinterForCommand(cmd)
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if err != nil {
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glog.FatalDepth(1, err)
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}
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config, err := options.loadConfig()
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if err != nil {
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glog.FatalDepth(1, err)
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}
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err = printer.PrintObj(config, out)
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if err != nil {
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glog.FatalDepth(1, err)
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}
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},
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}
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cmdutil.AddPrinterFlags(cmd)
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// Default to yaml
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cmd.Flags().Set("output", "yaml")
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options.merge.Default(true)
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cmd.Flags().Var(&options.merge, "merge", "merge together the full hierarchy of .kubeconfig files")
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return cmd
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}
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func (o *viewOptions) complete() bool {
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// if --kubeconfig, --global, or --local is specified, then merging doesn't make sense since you're declaring precise intent
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if (len(o.pathOptions.specifiedFile) > 0) || o.pathOptions.global || o.pathOptions.local {
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if !o.merge.Provided() {
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o.merge.Set("false")
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}
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}
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return true
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}
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func (o viewOptions) loadConfig() (*clientcmdapi.Config, error) {
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err := o.validate()
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if err != nil {
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return nil, err
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}
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config, _, err := o.getStartingConfig()
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return config, err
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}
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func (o viewOptions) validate() error {
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return nil
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}
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// getStartingConfig returns the Config object built from the sources specified by the options, the filename read (only if it was a single file), and an error if something goes wrong
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func (o *viewOptions) getStartingConfig() (*clientcmdapi.Config, string, error) {
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switch {
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case o.merge.Value():
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loadingRules := clientcmd.NewClientConfigLoadingRules()
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loadingRules.EnvVarPath = os.Getenv("KUBECONFIG")
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loadingRules.CommandLinePath = o.pathOptions.specifiedFile
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overrides := &clientcmd.ConfigOverrides{}
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clientConfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(loadingRules, overrides)
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config, err := clientConfig.RawConfig()
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if err != nil {
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return nil, "", fmt.Errorf("Error getting config: %v", err)
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}
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return &config, "", nil
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default:
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return o.pathOptions.getStartingConfig()
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}
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}
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