/
rename.go
88 lines (77 loc) · 2.56 KB
/
rename.go
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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"io"
"strings"
"github.com/pkg/errors"
"github.com/ahmetb/kubectx/internal/kubeconfig"
"github.com/ahmetb/kubectx/internal/printer"
)
// RenameOp indicates intention to rename contexts.
type RenameOp struct {
New string // NAME of New context
Old string // NAME of Old context (or '.' for current-context)
}
// parseRenameSyntax parses A=B form into [A,B] and returns
// whether it is parsed correctly.
func parseRenameSyntax(v string) (string, string, bool) {
s := strings.Split(v, "=")
if len(s) != 2 {
return "", "", false
}
new, old := s[0], s[1]
if new == "" || old == "" {
return "", "", false
}
return new, old, true
}
// rename changes the old (NAME or '.' for current-context)
// to the "new" value. If the old refers to the current-context,
// current-context preference is also updated.
func (op RenameOp) Run(_, stderr io.Writer) error {
kc := new(kubeconfig.Kubeconfig).WithLoader(kubeconfig.DefaultLoader)
defer kc.Close()
if err := kc.Parse(); err != nil {
return errors.Wrap(err, "kubeconfig error")
}
cur := kc.GetCurrentContext()
if op.Old == "." {
op.Old = cur
}
if !kc.ContextExists(op.Old) {
return errors.Errorf("context \"%s\" not found, can't rename it", op.Old)
}
if kc.ContextExists(op.New) {
printer.Warning(stderr, "context \"%s\" exists, overwriting it.", op.New)
if err := kc.DeleteContextEntry(op.New); err != nil {
return errors.Wrap(err, "failed to delete new context to overwrite it")
}
}
if err := kc.ModifyContextName(op.Old, op.New); err != nil {
return errors.Wrap(err, "failed to change context name")
}
if op.Old == cur {
if err := kc.ModifyCurrentContext(op.New); err != nil {
return errors.Wrap(err, "failed to set current-context to new name")
}
}
if err := kc.Save(); err != nil {
return errors.Wrap(err, "failed to save modified kubeconfig")
}
printer.Success(stderr, "Context %s renamed to %s.",
printer.SuccessColor.Sprint(op.Old),
printer.SuccessColor.Sprint(op.New))
return nil
}