mirror of https://github.com/k3s-io/k3s
133 lines
3.8 KiB
Go
133 lines
3.8 KiB
Go
/*
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Copyright 2017 The Kubernetes 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 config
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import (
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"errors"
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"fmt"
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"io"
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"github.com/spf13/cobra"
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"k8s.io/client-go/tools/clientcmd"
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cmdutil "k8s.io/kubectl/pkg/cmd/util"
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"k8s.io/kubectl/pkg/util/templates"
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)
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// RenameContextOptions contains the options for running the rename-context cli command.
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type RenameContextOptions struct {
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configAccess clientcmd.ConfigAccess
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contextName string
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newName string
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}
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const (
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renameContextUse = "rename-context CONTEXT_NAME NEW_NAME"
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renameContextShort = "Renames a context from the kubeconfig file."
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)
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var (
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renameContextLong = templates.LongDesc(`
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Renames a context from the kubeconfig file.
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CONTEXT_NAME is the context name that you wish to change.
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NEW_NAME is the new name you wish to set.
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Note: In case the context being renamed is the 'current-context', this field will also be updated.`)
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renameContextExample = templates.Examples(`
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# Rename the context 'old-name' to 'new-name' in your kubeconfig file
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kubectl config rename-context old-name new-name`)
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)
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// NewCmdConfigRenameContext creates a command object for the "rename-context" action
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func NewCmdConfigRenameContext(out io.Writer, configAccess clientcmd.ConfigAccess) *cobra.Command {
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options := &RenameContextOptions{configAccess: configAccess}
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cmd := &cobra.Command{
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Use: renameContextUse,
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DisableFlagsInUseLine: true,
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Short: renameContextShort,
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Long: renameContextLong,
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Example: renameContextExample,
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Run: func(cmd *cobra.Command, args []string) {
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cmdutil.CheckErr(options.Complete(cmd, args, out))
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cmdutil.CheckErr(options.Validate())
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cmdutil.CheckErr(options.RunRenameContext(out))
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},
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}
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return cmd
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}
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// Complete assigns RenameContextOptions from the args.
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func (o *RenameContextOptions) Complete(cmd *cobra.Command, args []string, out io.Writer) error {
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if len(args) != 2 {
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return helpErrorf(cmd, "Unexpected args: %v", args)
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}
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o.contextName = args[0]
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o.newName = args[1]
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return nil
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}
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// Validate makes sure that provided values for command-line options are valid
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func (o RenameContextOptions) Validate() error {
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if len(o.newName) == 0 {
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return errors.New("You must specify a new non-empty context name")
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}
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return nil
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}
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// RunRenameContext performs the execution for 'config rename-context' sub command
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func (o RenameContextOptions) RunRenameContext(out io.Writer) error {
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config, err := o.configAccess.GetStartingConfig()
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if err != nil {
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return err
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}
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configFile := o.configAccess.GetDefaultFilename()
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if o.configAccess.IsExplicitFile() {
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configFile = o.configAccess.GetExplicitFile()
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}
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context, exists := config.Contexts[o.contextName]
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if !exists {
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return fmt.Errorf("cannot rename the context %q, it's not in %s", o.contextName, configFile)
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}
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_, newExists := config.Contexts[o.newName]
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if newExists {
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return fmt.Errorf("cannot rename the context %q, the context %q already exists in %s", o.contextName, o.newName, configFile)
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}
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config.Contexts[o.newName] = context
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delete(config.Contexts, o.contextName)
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if config.CurrentContext == o.contextName {
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config.CurrentContext = o.newName
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}
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if err := clientcmd.ModifyConfig(o.configAccess, *config, true); err != nil {
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return err
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}
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fmt.Fprintf(out, "Context %q renamed to %q.\n", o.contextName, o.newName)
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return nil
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}
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