kubectx/cmd/kubens/flags.go
Suleiman Dibirov b5daf2cef7
feat(kubens): added force flag to switch namespaces even if it doesn'… (#416)
* feat(kubens): added force flag to switch namespaces even if it doesn't exist

* Merged lines

* fixed README.md and flags.go

* updated flags.go, flags_test.go
2024-07-09 21:38:40 -07:00

85 lines
2.0 KiB
Go

// 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 (
"fmt"
"io"
"os"
"slices"
"strings"
"github.com/ahmetb/kubectx/internal/cmdutil"
)
// UnsupportedOp indicates an unsupported flag.
type UnsupportedOp struct{ Err error }
func (op UnsupportedOp) Run(_, _ io.Writer) error {
return op.Err
}
// parseArgs looks at flags (excl. executable name, i.e. argv[0])
// and decides which operation should be taken.
func parseArgs(argv []string) Op {
n := len(argv)
if n == 0 {
if cmdutil.IsInteractiveMode(os.Stdout) {
return InteractiveSwitchOp{SelfCmd: os.Args[0]}
}
return ListOp{}
}
if n == 1 {
v := argv[0]
switch v {
case "--help", "-h":
return HelpOp{}
case "--version", "-V":
return VersionOp{}
case "--current", "-c":
return CurrentOp{}
default:
return getSwitchOp(v, false)
}
} else if n == 2 {
// {namespace} -f|--force
name := argv[0]
force := slices.Contains([]string{"-f", "--force"}, argv[1])
if !force {
if !slices.Contains([]string{"-f", "--force"}, argv[0]) {
return UnsupportedOp{Err: fmt.Errorf("unsupported arguments %q", argv)}
}
// -f|--force {namespace}
force = true
name = argv[1]
}
return getSwitchOp(name, force)
}
return UnsupportedOp{Err: fmt.Errorf("too many arguments")}
}
func getSwitchOp(v string, force bool) Op {
if strings.HasPrefix(v, "-") && v != "-" {
return UnsupportedOp{Err: fmt.Errorf("unsupported option %q", v)}
}
return SwitchOp{Target: v, Force: force}
}