mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-10-30 21:30:16 +00:00
108 lines
2.6 KiB
Go
108 lines
2.6 KiB
Go
/*
|
|
Copyright 2015 Google Inc. All rights reserved.
|
|
|
|
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 util
|
|
|
|
import (
|
|
"flag"
|
|
"reflect"
|
|
"strings"
|
|
|
|
"github.com/spf13/pflag"
|
|
)
|
|
|
|
// flagValueWrapper implements pflag.Value around a flag.Value. The main
|
|
// difference here is the addition of the Type method that returns a string
|
|
// name of the type. As this is generally unknown, we approximate that with
|
|
// reflection.
|
|
type flagValueWrapper struct {
|
|
inner flag.Value
|
|
flagType string
|
|
}
|
|
|
|
func wrapFlagValue(v flag.Value) pflag.Value {
|
|
// If the flag.Value happens to also be a pflag.Value, just use it directly.
|
|
if pv, ok := v.(pflag.Value); ok {
|
|
return pv
|
|
}
|
|
|
|
pv := &flagValueWrapper{
|
|
inner: v,
|
|
}
|
|
|
|
t := reflect.TypeOf(v)
|
|
if t.Kind() == reflect.Interface || t.Kind() == reflect.Ptr {
|
|
t = t.Elem()
|
|
}
|
|
|
|
pv.flagType = t.Name()
|
|
pv.flagType = strings.TrimSuffix(pv.flagType, "Value")
|
|
return pv
|
|
}
|
|
|
|
func (v *flagValueWrapper) String() string {
|
|
return v.inner.String()
|
|
}
|
|
|
|
func (v *flagValueWrapper) Set(s string) error {
|
|
return v.inner.Set(s)
|
|
}
|
|
|
|
func (v *flagValueWrapper) Type() string {
|
|
return v.flagType
|
|
}
|
|
|
|
type boolFlag interface {
|
|
flag.Value
|
|
IsBoolFlag() bool
|
|
}
|
|
|
|
func (v *flagValueWrapper) IsBoolFlag() bool {
|
|
if bv, ok := v.inner.(boolFlag); ok {
|
|
return bv.IsBoolFlag()
|
|
}
|
|
return false
|
|
}
|
|
|
|
// Imports a 'flag.Flag' into a 'pflag.FlagSet'. The "short" option is unset
|
|
// and the type is inferred using reflection.
|
|
func addFlagToPFlagSet(f *flag.Flag, fs *pflag.FlagSet) {
|
|
if fs.Lookup(f.Name) == nil {
|
|
fs.Var(wrapFlagValue(f.Value), f.Name, f.Usage)
|
|
}
|
|
}
|
|
|
|
// Adds all of the flags in a 'flag.FlagSet' package flags to a 'pflag.FlagSet'.
|
|
func AddFlagSetToPFlagSet(fsIn *flag.FlagSet, fsOut *pflag.FlagSet) {
|
|
fsIn.VisitAll(func(f *flag.Flag) {
|
|
addFlagToPFlagSet(f, fsOut)
|
|
})
|
|
}
|
|
|
|
// Add all of the top level 'flag' package flags to the top level 'pflag' flags.
|
|
func AddAllFlagsToPFlags() {
|
|
AddFlagSetToPFlagSet(flag.CommandLine, pflag.CommandLine)
|
|
}
|
|
|
|
// Merge all of the flags from fsFrom into fsTo.
|
|
func AddPFlagSetToPFlagSet(fsFrom *pflag.FlagSet, fsTo *pflag.FlagSet) {
|
|
fsFrom.VisitAll(func(f *pflag.Flag) {
|
|
if fsTo.Lookup(f.Name) == nil {
|
|
fsTo.AddFlag(f)
|
|
}
|
|
})
|
|
}
|