143 lines
4.0 KiB
Go
143 lines
4.0 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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"errors"
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"io"
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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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"github.com/GoogleCloudPlatform/kubernetes/pkg/client/clientcmd/api/latest"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl"
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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='{{range .users}}{{ if eq .name "e2e" }}{{ index .user.password }}{{end}}{{end}}'`
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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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version := cmdutil.OutputVersion(cmd, latest.Version)
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printer = kubectl.NewVersionedPrinter(printer, clientcmdapi.Scheme, version)
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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 o.pathOptions.Global || o.pathOptions.Local || o.pathOptions.UseEnvVar {
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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 o.pathOptions.Validate()
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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, error) {
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switch {
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case !o.merge.Value():
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switch {
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case len(o.pathOptions.LoadingRules.ExplicitPath) > 0:
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return clientcmd.LoadFromFile(o.pathOptions.LoadingRules.ExplicitPath)
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case o.pathOptions.Global:
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return clientcmd.LoadFromFile(o.pathOptions.GlobalFile)
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case o.pathOptions.UseEnvVar:
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return clientcmd.LoadFromFile(o.pathOptions.EnvVarFile)
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case o.pathOptions.Local:
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return clientcmd.LoadFromFile(o.pathOptions.LocalFile)
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default:
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return nil, errors.New("if merge==false a precise file must to specified")
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}
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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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