mirror of
https://github.com/k3s-io/kubernetes.git
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137 lines
3.7 KiB
Go
137 lines
3.7 KiB
Go
/*
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Copyright 2014 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/renstrom/dedent"
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"github.com/spf13/cobra"
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"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
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clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
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"k8s.io/kubernetes/pkg/util/flag"
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)
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type createContextOptions struct {
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configAccess clientcmd.ConfigAccess
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name string
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cluster flag.StringFlag
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authInfo flag.StringFlag
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namespace flag.StringFlag
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}
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var (
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create_context_long = dedent.Dedent(`
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Sets a context entry in kubeconfig
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Specifying a name that already exists will merge new fields on top of existing values for those fields.`)
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create_context_example = dedent.Dedent(`
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# Set the user field on the gce context entry without touching other values
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kubectl config set-context gce --user=cluster-admin`)
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)
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func NewCmdConfigSetContext(out io.Writer, configAccess clientcmd.ConfigAccess) *cobra.Command {
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options := &createContextOptions{configAccess: configAccess}
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cmd := &cobra.Command{
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Use: fmt.Sprintf("set-context NAME [--%v=cluster_nickname] [--%v=user_nickname] [--%v=namespace]", clientcmd.FlagClusterName, clientcmd.FlagAuthInfoName, clientcmd.FlagNamespace),
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Short: "Sets a context entry in kubeconfig",
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Long: create_context_long,
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Example: create_context_example,
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Run: func(cmd *cobra.Command, args []string) {
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if !options.complete(cmd) {
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return
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}
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err := options.run()
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if err != nil {
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fmt.Fprintf(out, "%v\n", err)
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} else {
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fmt.Fprintf(out, "context %q set.\n", options.name)
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}
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},
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}
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cmd.Flags().Var(&options.cluster, clientcmd.FlagClusterName, clientcmd.FlagClusterName+" for the context entry in kubeconfig")
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cmd.Flags().Var(&options.authInfo, clientcmd.FlagAuthInfoName, clientcmd.FlagAuthInfoName+" for the context entry in kubeconfig")
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cmd.Flags().Var(&options.namespace, clientcmd.FlagNamespace, clientcmd.FlagNamespace+" for the context entry in kubeconfig")
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return cmd
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}
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func (o createContextOptions) run() error {
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err := o.validate()
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if err != nil {
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return err
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}
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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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startingStanza, exists := config.Contexts[o.name]
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if !exists {
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startingStanza = clientcmdapi.NewContext()
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}
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context := o.modifyContext(*startingStanza)
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config.Contexts[o.name] = &context
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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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return nil
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}
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func (o *createContextOptions) modifyContext(existingContext clientcmdapi.Context) clientcmdapi.Context {
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modifiedContext := existingContext
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if o.cluster.Provided() {
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modifiedContext.Cluster = o.cluster.Value()
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}
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if o.authInfo.Provided() {
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modifiedContext.AuthInfo = o.authInfo.Value()
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}
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if o.namespace.Provided() {
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modifiedContext.Namespace = o.namespace.Value()
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}
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return modifiedContext
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}
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func (o *createContextOptions) complete(cmd *cobra.Command) bool {
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args := cmd.Flags().Args()
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if len(args) != 1 {
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cmd.Help()
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return false
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}
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o.name = args[0]
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return true
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}
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func (o createContextOptions) validate() error {
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if len(o.name) == 0 {
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return errors.New("you must specify a non-empty context name")
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}
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return nil
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}
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